BIAMP SYSTEMS SPM723 Programmable Stereo Preamp Mixer Instruction Manual
- June 13, 2024
- BIAMP SYSTEMS
Table of Contents
SPM723 Programmable Stereo Preamp Mixer
Product Information
| Product Name | SPM723 Programmable Stereo Preamp/Mixer |
|---|---|
| Manufacturer | Biamp Systems |
| Address | 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A. |
| Affiliate | Rauland-Borg Corp. |
| Website | https://manual-hub.com/ |
| Contact Number | 503-641-7287 |
| Print Update | September 7, 2005 |
Front & Rear Panel Features
The SPM723 Programmable Stereo Preamp/Mixer has the following
front and rear panel features:
Front Panel Features:
-
Activity LED: This red LED indicates when control information
is being received via RS-232. -
On Indicator: When the power transformer is plugged in, and AC
power is applied to the SPM723, the red On indicator remains lit.
When power is removed, all ‘current’ settings (sources, levels,
tone, etc.) will be stored in non-volatile memory and recalled when
power is restored. During Setup the SPM723 may instead be set to
always recall Preset #1 when power is turned back on (see Setup on
pg. 10).
Rear Panel Features:
-
AC Power Cord: The power transformer provides 27 Volts AC to
the SPM723, and is detachable via a 5-pin DIN connector. The SPM723
has two internal ‘self-resetting’ fuses (there are no user
serviceable parts inside the unit). If the internal fuses blow,
they will attempt to re-set after a short period. However, this may
be an indication that the SPM723 requires service. -
Link Switch: The Link Switch is used when connecting multiple
devices in a ‘Link Port to Serial Port’ configuration (see Link
Port above). From the factory, the Link Switch is released (out).
When connecting multiple devices, the Link Switch must be depressed
(in) on all devices except the final device in the system (the
device with no Link Port connection). -
Logic Outputs: This 9-pin Sub-D connector provides Logic
Outputs 1~8 (see Logic Outputs on pg. 15). Logic Outputs may be
used to control external switching circuits, such as relays or
other BIAMP products. These outputs are typically used to provide
simultaneous audio & video source selection, by controlling an
external video switching device. -
Logic Inputs: This 9-pin Sub-D (female) connector provides
eight logic inputs for controlling the SPM723 via contact closures
(see Logic Inputs on pg. 14). Logic Input functions are programmed
via software (see Setup on pg. 9). NOTE: From the factory, Logic
Inputs 1~8 have no pre-programmed function. -
Main & Zone Outputs: These plug-in barrier strips provide
the balanced stereo line-level Main & Zone Outputs. For
balanced output, wire high to (+), low to (-), and ground to (d).
For unbalanced output (-6dB gain), wire high to (+) and ground to
(d), leaving (-) unconnected. Main & Zone Outputs can be set
for stereo or mono operation, and include signals from Line Inputs
1~7 and Mic/Line Inputs 1 & 2, as determined via software (see
Setup on pg. 4).
Product Usage Instructions
To use the SPM723 Programmable Stereo Preamp/Mixer, follow these
instructions:
-
Ensure the AC power cord is securely connected to the power
transformer and the SPM723. -
Connect the Logic Inputs to external devices using contact
closures. These inputs can be programmed to control various
functions of the SPM723 via software. -
Connect the Logic Outputs to external switching circuits, such
as relays or other BIAMP products, if needed. -
Connect the Main & Zone Outputs to your audio system. For
balanced output, wire high to (+), low to (-), and ground to (d).
For unbalanced output (-6dB gain), wire high to (+) and ground to
(d), leaving (-) unconnected. -
Adjust the settings for sources, levels, tone, etc. using the
controls on the front panel of the SPM723. -
If desired, set the SPM723 to always recall a specific preset
when power is turned back on. Refer to the Setup section on page 10
of the user manual for instructions.
SPM723
Programmable Stereo Preamp/Mixer
Operation Manual
Biamp Systems, 10074 S.W. Arctic Drive, Beaverton, Oregon 97005 U.S.A.
an affiliate of Rauland-Borg Corp.
www.biamp.com
print update September 7, 2005
TABLE OF CONTENTS Front & Rear Panel Features Setup Logic Inputs Logic Outputs RS-232 Control Specifications & Block Diagram Warranty
pgs. 2 & 3 pgs. 4~13
pg. 14 pg. 15 pgs. 16 & 17 pg. 18
SPM723
INTRODUCTION
The SPM723 provides seven stereo line inputs, two mono mic/line inputs, and
three stereo outputs. Complete programmability and control of the SPM723
includes independent left/right levels for each input and output, mic/line
routing & priority, automatic/manual program ducking, mic/line & output tone
adjustment, and 16 memory presets. The SPM723 is extremely versatile, with
software customized setup, making it ideally suited for many applications
including meeting rooms, restaurant/bars, and retail stores.
SPM723 features include: settings programmed via BiampWin PC control software
seven stereo line inputs, with individual volume & mute surround sound’ support assigns input 6 to the aux output input 7 assignable stereo unbalanced or mono balanced input 7 ‘override’ select via external switch or input signal two balanced mic/line inputs, with HPF & phantom power mic/line inputs include individual trim, tone, volume & mute stereo inputducking’ via external
switch or mic/line signals separate left/right or stereo ganged’ faders on all inputs independent stereo main & stereo zone balanced outputs balanced stereo aux output, with independent source select outputs include 3-band, mid- sweep stereo tone adjustment outputs independently assignable for stereo/mono operation separate left/right or stereoganged’ faders on all outputs signal
level meters on input 7, mic/line inputs, & all outputs mixing of multiple
input signals or selection of single source store & recall up to sixteen non-
volatile memory presets remote control via RS-232 & programmable logic inputs
Windows® 95/98/NT/2000/XP software & cable included incorporates AES
recommended grounding practices marked and UL / C-UL listed power source
covered by Biamp Systems’ five year warranty
1
FRONT & REAR PANEL FEATURES
activity
on
SPM723
FRONT PANEL FEATURES
REAR PANEL FEATURES
Activity LED: This red LED indicates when control information is being
received via RS-232.
On Indicator: When the power transformer is plugged in, and AC power is
applied to the SPM723, the red On indicator remains lit. When power is
removed, all ‘current’ settings (sources, levels, tone, etc.) will be stored
in non-volatile memory and recalled when power is restored. During Setup the
SPM723 may instead be set to always recall Preset #1 when power is turned back
on (see Setup on pg. 10).
AC Power Cord: The power transformer provides 27 Volts AC to the SPM723, and
is detachable via a 5-pin DIN connector. The SPM723 has two internal `self-
resetting’ fuses (there are no user serviceable parts inside the unit). If the
internal fuses blow, they will attempt to re-set after a short period.
However, this may be an indication that the SPM723 requires service.
Serial Port: This 9-pin Sub-D (male) connector provides an RS232 Serial Port
for remote control via computer or third-party controllers (see RS-232 Control
on pg. 16). The Serial Port has the following pin assignments (left-to-right &
top-to-bottom): Pin 1) not used; Pin 2) Receive Data (RxD) input; Pin 3)
Transmit Data (TxD) output; Pin 4) Data Terminal Ready (DTR) output; Pin 5)
Ground; Pin 6) not used; Pin 7) Request To Send (RTS) output; Pin 8) not used;
Pin 9) not used. BiampWin software and a null-modem cable are provided for
programming (see Setup on pg. 4). NOTE: The Serial Port can also transmit
commands received via the Logic Inputs (see Setup on pg. 9).
Link Port: This 9-pin Sub-D (female) connector provides a Link Port for RS-232 control of multiple BIAMP products (see RS-232 Control on pg. 16). The Link Port of one device simply connects to the Serial Port of the next device (and so forth). Link cables are available as an option (Biamp #909-0057-00). NOTE: All but the final device in a system should have the Link Switch pressed in (see below). The Link Port has the following pin assignments (right-to-left & top-to-bottom): Pin 1) not used; Pin 2) Transmit Data (TxD) output; Pin 3) Receive Data (RxD) input; Pin 4) not used; Pin 5) Ground; Pin 6) not used; Pin 7) not used; Pin 8) not used; Pin 9) not used. NOTE: The Link Port will also transmit commands received via the Logic Inputs (see Setup on pg. 9).
Link Switch: The Link Switch is used when connecting multiple devices in a `Link Port to Serial Port’ configuration (see Link Port above). From the factory, the Link Switch is released (out). When connecting multiple devices, the Link Switch must be depressed (in) on all devices except the final device in the system (the device with no Link Port connection).
2
FRONT & REAR PANEL FEATURES
SPM 723 ~ 27V
50/60 Hz 27 watts class 2 wiring
serial port
logic outputs
link port
link
logic inputs
override sig pres mute sig pres mute sig pres
L
R
L
R
L
R
LR
L
L
L
zone output
main output
aux output
override
R
line
7 inputs 6
5
R
4
3
R
2
1
mute mic/line 2 mute mic/line 1
Logic Outputs: This 9-pin Sub-D connector provides Logic Outputs 1~8 (see
Logic Outputs on pg. 15). Logic Outputs may be used to control external
switching circuits, such as relays or other BIAMP products. These outputs are
typically used to provide simultaneous audio & video source selection, by
controlling an external video switching device.
Logic Inputs: This 9-pin Sub-D (female) connector provides eight logic inputs
for controlling the SPM723 via contactclosures (see Logic Inputs on pg. 14).
Logic Input functions are programmed via software (see Setup on pg. 9). NOTE:
From the factory, Logic Inputs 1~8 have no pre-programmed function.
Main & Zone Outputs: These plug-in barrier strips provide the balanced stereo
line-level Main & Zone Outputs. For balanced output, wire high to (+), low to
(-), and ground to (d). For unbalanced output (-6dB gain), wire high to (+)
and ground to (d), leaving (-) unconnected. Main & Zone Outputs can be set for
stereo or mono operation, and include signals from Line Inputs 1~7 and
Mic/Line Inputs 1 & 2, as determined via software (see Setup on pg. 4).
Aux Output: This plug-in barrier strip provides the balanced stereo line-level
Aux Output. For balanced output, wire high to (+), low to (-), and ground to
(d). For unbalanced output (-6dB gain), wire high to (+) and ground to (d),
leaving (-) unconnected. Aux Output can be set for stereo or mono operation,
and includes signals from Main & Zone Outputs, as determined via software (see
Setup on pg. 7).
Line Inputs 1~6: These RCA connectors provide the unbalanced stereo Line
Inputs 1~6.
Line Input 7: This plug-in barrier strip provides the unbalanced stereo Line
Input 7. Line Input 7 can instead be set for balanced mono input, via software
(see Setup on pg. 4).
Override: This plug-in barrier strip provides Line Input 7 Override, which is
a priority selection of that input over all other stereo line inputs. Wiring
(sig pres) to (override) causes automatic override whenever signal is present
at Line Input 7. Manual override instead uses a contact-closure wired between
(override) & (d). Override functions are determined via software (see Setup on
pg. 13).
Mic/Line Inputs 1 & 2: These plug-in barrier strips provide the balanced mono
inputs for Mic/Line 1 & 2. For balanced input, wire high to (+), low to (-),
and ground to (d). For unbalanced input, wire high to (+), and ground to both
(-) & (d). Mic/Line 1 & 2 functions are determined via software (see Setup on
pg. 6).
Mute: These plug-in barrier strips provide for `talk-over’ ducking of the
stereo line input signals. By wiring (signal present) to (mute), automatic
ducking will occur whenever signal is present at the respective Mic/Line
Input. Manual ducking instead uses a contact-closure wired between (mute) &
(d). Mute functions are determined via software (see Setup on pgs. 11 & 12).
3
SETUP
SPM723 parameters are all adjustable using the BiampWin software and null-
modem cable provided with the unit. The BiampWin software provides programs
for various BIAMP products, including the SPM723. The SPM723 program includes
seven control screens, which are described on the following pages. Once the
software is started (and Comm Port Configuration is set), the control screens
are accessed via the drop-down menus at the top of the opening screen. The Mix
screen appears whenever an SPM723 file is opened, and it has four tabs: Main
Program, Zone Program, Mic/Line 1 / Mic/Line 2, & Aux Output. The Configure
SPM723 menu offers additional screens for Button Definitions, Logic Input
Definitions, & Configuration Options. The File menu provides functions such as
save, open, download, etc. The Settings menu recalls the Comm Port
Configuration screen. The Window menu arranges active product screens. The
Help menu explains available adjustments. To install BiampWin Software: Select
Run’ fromStart’ menu, and browse to ‘BiampWin’ on appropriate drive. System
Requirements: Windows® 95/98/NT/2000/XP with 8MB of available hard disk space
(serial port required for on-line’ operation). MAIN PROGRAM SCREEN The Main Program tab on the Mix screen provides level faders & mute buttons for mixing Line Inputs 1~7 to the Main Output. The faders on each input can be assigned for separate left/right or stereo ganged operation. Line Input 7 includes a signal level meter, and can be assigned as either a normal unbalanced stereo line input or as a special balanced mono line input. The Main Output section also provides faders which can be assigned for separate left/right or stereo ganged operation, and includes a mute button, a 3-band mid-sweep EQ, and a signal level meter. In addition, the Main Output may be switched from stereo operation to mono operation (a mono sum of the left/right signals then appears at both outputs). The bottom of the screen shows on/off status of the eight Logic Inputs and the eight Logic Outputs. Sixteen buttons are provided for recalling non-volatile memory presets. A separate Store button provides a menu for storing settings into the sixteen memory preset locations. Presets contain settings affecting all inputs/outputs. The title bar at the top of the Mix screen shows Device #, custom Device Name, & model of product being controlled. BiampWin software can operateoff-line’ (no product connected) by opening a new’ file for the desired product. The Device # foroff-line’ files is assigned sequentially as
a negative number.
4
SETUP
ZONE PROGRAM SCREEN The Zone Program tab on the Mix screen provides level
faders & mute buttons for mixing Line Inputs 1~7 to the Zone Output. The
faders on each input can be assigned for separate left/right or stereo ganged
operation. Line Input 7 includes a signal level meter, and can be assigned as
either a normal unbalanced stereo line input or as a special balanced mono
line input. The Zone Output section also provides faders which can be assigned
for separate left/right or stereo ganged operation, and includes a mute
button, a 3-band mid-sweep EQ, and a signal level meter. In addition, the Zone
Output may be switched from stereo operation to mono operation (a mono sum of
the left/right signals then appears at both outputs). The bottom of the screen
shows on/off status of the eight Logic Inputs and the eight Logic Outputs.
Sixteen buttons are provided for recalling non-volatile memory presets. A
separate Store button provides a menu for storing settings into the sixteen
memory preset locations. Presets contain settings affecting all
inputs/outputs. The title bar at the top of the Mix screen shows Device #,
custom Device Name, & model of product being controlled. BiampWin software can
operate off-line’ (no product connected) by opening anew’ file for the
desired product. The Device # for `off-line’ files is assigned sequentially as
a negative number.
5
SETUP
MIC/LINE 1 / MIC/LINE 2 SCREEN The Mic/Line 1 / Mic/Line 2 tab on the Mix
screen provides level faders & mute buttons for mixing Mic/Line Inputs 1 & 2
to both the Main & Zone Outputs. The faders on each input can be assigned for
separate left/right or stereo ganged operation. Each Mic/Line Input includes
adjustable Gain, with a Peak indicator and a signal level meter. Gain adjusts
the input to compensate for different signal levels. For best performance,
adjust Gain so the Peak indicator flashes on occasional peaks in signal level
(8dB before clipping). Each Mic/Line Input also includes selection boxes for
Enable, High Pass Filter, & Phantom Power. Enable Main allows that Mic/Line
Input signal to be available for mixing to the Main Output. Enable Zone allows
that Mic/Line Input signal to be available for mixing to the Zone Output.
NOTE: Enable Main & Enable Zone also affect the ability for the associated
Mic/Line input to initiate ducking’ (see Miscellaneous Screen on pg. 10). High Pass Filter reduces the Mic/Line Input low frequency signals 6dB/octave @ 110Hz. Phantom Power turns on +24 Volt at the Mic/Line Input, for powering condenser mics. EQ provides Bass & Treble equalization (tone control) for each Mic/Line Input. Main Mic Priority selects which Mic/Line Input (if any) shall have priority over the other Mic/Line Input, at the Main Output. Zone Mic Priority selects which Mic/Line Input (if any) shall have priority over the other Mic/Line Input, at the Zone Output. NOTE: Mic/Line Input signals are mixed to the outputspost-fader’. Therefore, Main/Zone Output EQ and fader
settings do NOT affect Mic/Line Input signals which appear at the outputs. The
bottom of the screen shows on/off status of the eight Logic Inputs and the
eight Logic Outputs. Sixteen buttons are provided for recalling non-volatile
memory presets. A separate Store button provides a menu for storing settings
into the sixteen memory preset locations. Presets contain settings affecting
all inputs/outputs. The title bar at the top of the Mix screen shows Device #,
custom Device Name, & model of product being controlled. BiampWin software can
operate off-line’ (no product connected) by opening anew’ file for the
desired product. The Device # for `off-line’ files is assigned sequentially as
a negative number.
6
SETUP
AUX OUTPUT SCREEN The Aux Output tab on the Mix screen provides faders which
can be assigned for separate left/right or stereo ganged operation, and
includes a mute button, a 3-band mid-sweep EQ, and a signal level meter. In
addition, the Aux Output may be switched from stereo operation to mono
operation (a mono sum of the left/right signals then appears at both outputs).
Unlike the Main/Zone Outputs, the Aux Output does not allow input signals to
be mixed directly to it. Instead, the Aux Output only allows Source Selection
of input signals, as they appear at the Main and/or Zone Outputs. NOTE:
Mic/Line Input signals are mixed to the Aux Output pre-fader’. Therefore, Aux Output EQ & fader settings, as well as Mic/Line EQ & fader settings, BOTH affect Mic/Line Input signals which appear at the Aux Output. One exception to this Source Selection routine is Input 6 (Surround), which allows Input 6 to be mixed directly to the Aux Output for surround sound applications. Under these circumstances, the Input 6 faders on the Main Program screen are used instead to feed Input 6 exclusively to the Aux Output (not to the Main or Zone Outputs). The Input 6 faders on the Zone Program screen become disabled. With appropriate signals applied to Input 6, the Aux Output can then be used to provided the additional 5th & 6th (center & sub) outputs necessary for surround sound. Other inputs receive the signals representing Front L & R and Rear L & R, which would then be mixed to the Main & Zone Outputs (see Applications on pg. 21). NOTE: To select Input 6 (Surround), it must first be enabled via the Miscellaneous Screen (see Miscellaneous Screen on pg. 10). The bottom of the screen shows on/off status of the eight Logic Inputs and the eight Logic Outputs. Sixteen buttons are provided for recalling non-volatile memory presets. A separate Store button provides a menu for storing settings into the sixteen memory preset locations. Presets contain settings affecting all inputs/outputs. The title bar at the top of the Mix screen shows Device #, custom Device Name, & model of product being controlled. BiampWin software can operateoff-line’ (no product connected) by opening a new’ file for the desired product. The Device # foroff-line’ files is assigned sequentially as
a negative number.
7
SETUP
BUTTON DEFINITION SCREEN The Button Definitions screen is accessed through the
Configue SPM723 menu, and is used to assign specific actions’ to remote control buttons. Although the SPM723 does not accept commands from push-button remote controls directly, it can receive individual ASCII characters (via RS-232) from other BIAMP products or third-party control systems. From the factory, Remote Control Buttons have equivalent ASCII characters permanently assigned to them (see RS-232 Control on pg. 16). Therefore, a Remote Control Button can be assigned specificactions’, which the SPM723 will then perform
whenever the equivalent ASCII character for that button is received. From the
factory, Remote Control Buttons have no pre-programmed functions. However,
using the Button Definitions screen, each Remote Control Button may be
assigned various actions’. Remote Control Buttons selects which button is to be defined. Equivalent ASCII Character displays the permanent ASCII character for the selected button. Store Preset allows store actions for Presets 1~16 to be assigned to the selected button. Recall Preset allows recall actions for Presets 1~16 to be assigned to the selected button. Logic Outputs allowson’,
off’, &toggle’ actions for Logic Outputs 1~8 to be assigned to the selected
button. Echo Character displays the `echo’ character for the selected button.
NOTE: Echo Characters are permanent for Remote Control Buttons, and can only
be changed for Logic Inputs (see next page). Main Volume & Zone Volume allow
specific volume & muting actions for Line Inputs 1~7, Mic/Line 1 & 2, Main
Output, & Zone Output to be assigned to the selected button. Aux Volume allows
specific volume & muting actions for Aux Output to be assigned to the selected
button. Clear allows all actions assigned to the selected button (or all
buttons) to be cleared. Help provides additional instruction. Try It causes
the actions currently assigned to the selected button to be performed by the
SPM723. Close will close the Button Definitions screen.
8
SETUP
LOGIC INPUT DEFINITION SCREEN The Logic Input Definitions screen is accessed
through the Configure SPM723 menu, and is used to assign specific actions’ to the Logic Inputs. Logic Inputs allow remote control of the SPM723 via external circuits, such as switches, contact-closures, active driver circuits, and/or open-collector’ logic outputs (see Logic Inputs on pg. 14). From the factory,
Logic Inputs 1~8 have no pre-programmed functions. However, using the Logic
Input Definitions screen, each Logic Input may be assigned various actions’. Logic Inputs selects which Logic Input is to be defined. NOTE: Since Logic Inputs are controlled by switches, contact-closures, etc., each Logic Input may be assigned certain actions to perform when the switch isopened’, and
different actions to perform when that same switch is closed’. Store Preset allows store actions for Presets 1~16 to be assigned to the selected Logic Input. Recall Preset allows recall actions for Presets 1~16 to be assigned to the selected Logic Input. Logic Outputs allowson’, off’, &toggle’ actions
for Logic Outputs 1~8 to be assigned to the selected Logic Input. Echo
Character allows the echo’ character for the selected Logic Input to be changed. NOTE: This is the RS-232 ASCII character which will be transmitted via the Serial Port/Link Port whenever that Logic Input is switched. From the factory, no echo characters are assigned to Logic Inputs 1~8. Changing the Echo Character is used primarily for customizing remote control commands amongst various RS-232 controlled products within a system (see RS-232 Control on pg. 16). Main Volume & Zone Volume allow specific volume & muting actions for Line Inputs 1~7, Mic/Line 1 & 2, Main Output, & Zone Output to be assigned to the selected button. Aux Volume allows specific volume & muting actions for Aux Output to be assigned to the selected button. NOTE: Although Logic Input volume actions include arepeating’ (volume ramp) function, they will not
continuously repeat the echo character via RS-232. Clear allows all actions
assigned to the selected Logic Input (or all Logic Inputs) to be cleared. Help
provides additional instruction. Try It causes the actions currently assigned
to the selected Logic Input to be performed by the SPM723. Close will close
the Logic Input Definitions screen.
9
SETUP
MISCELLANEOUS SCREEN The Configuration Options screen is accessed through the
Configure SPM723 menu, and the Miscellaneous tab on the Configuration Options
screen is then used to select options which customize the operation of the
SPM723. At the top of the Miscellaneous screen, the Serial Number and Firmware
Version of the particular SPM723 will be displayed. The BiampWin software can
operate off-line’ (with no product connected) by opening anew’ file for the
desired product. The Serial Number & Firmware Version are not displayed for
new’ (offline) files. Device Name allows a custom name to be given to the SPM723, by entering up to 30 characters of text. The Device Name will be stored in the SPM723 memory, and will be displayed on the title bar of the Mix screen whenever that SPM723 is accessed using the software. Device Number opens a drop-down menu which allows assignment of anaddress’ number (0~63)
to the SPM723, for computer control of multiple units. Surround Sound Support
enables Input 6 source selection on the Aux screen, which allows the Aux
Output to provide the additional independent outputs necessary for surround
sound applications (see Aux Screen on pg. 7) Power-Up Status determines what
settings the SPM723 will automatically recall whenever power is turned on.
From the factory, the SPM723 is set to recall the settings which existed prior
to power being shut off. Recall Preset 1 at Power Up will instead cause the
SPM723 to recall this specific preset at power-up. Main Program Page-Over
Ducking and Zone Program Page-Over Ducking determine the amount of attenuation
applied to stereo Line Input 1~7 signals, and how quickly they return to
normal level, when ducking has been triggered (see Mute on pg. 3). Duck Amount
opens a drop-down menu of 41 attenuation choices (0dB~80dB). Ramp Rate opens a
drop-down menu of 200 return rate choices (1dB~200dB per second). NOTE: A
Mic/Line Input must be enabled to an output before it can trigger ducking at
that output (see Mic/Line Screen on pg. 6). Restore Defaults opens a pop-up
menu, which allows the Miscellaneous options (or all Configuration Options) to
be set back to their factory defaults. Help provides additional instruction.
Close will return you to the Mix screen.
10
SETUP
MUTE 1 / MIC 1 SCREEN The Configuration Options screen is accessed through the
Configure SPM723 menu, and the Mute 1 / Mic 1 tab on the Configuration Options
screen is then used to select options which customize the function of the
Mic/Line 1 Mute terminal (see Front & Rear Panel Features on pg. 3). Mute 1
Input Causes Gated Operation of Mic 1 toggles assignment of gating to the
Mic/Line 1 signal. Gating allows that mic/line input signal to remain off,
until triggered on either manually (via contact-closure) or automatically (via
signal present) at the Mute 1 terminal. Mute 1 Input Causes Page-Over Duck of
the Main Program Source toggles assignment of ducking at the Main Output. Mute
1 Input Causes Page-Over Duck of the Zone Program Source toggles assignment of
ducking at the Zone Output. Ducking is a temporary attenuation of the stereo
Line Input 1~7 signals at that output, which is triggered manually (via
contact-closure) or automatically (via signal present) at the Mute 1 terminal.
NOTE: A Mic/Line Input must be enabled before it can trigger ducking (see
Mic/Line Screen on pg. 6). Mute 1 Hold Time opens a drop-down menu of 256 hold
time choices (0~63.75 seconds). NOTE: Hold Time determines how long mute
functions remain in effect after triggering (manual or automatic) is released.
Hold Time is not the same as Ramp Rate, which determines how fast a signal
returns to normal after Hold Time has elapsed. Mute 1 Behaves Like a
Programmable Logic Input will disable the Mute 1 functions described above,
and instead allow the Mute 1 terminal to be used as a logic input, which can
then be programmed like a remote control button (see Setup on pg. 8). However,
a logic input can have two button definitions’, one for when the circuit is closed’ (activated) and another for when the circuit is opened’ (released). Therefore, drop-down menus of the forty possible control buttons are provided for both theclosing’ & the `opening’ of the logic input circuit. The logic
input can still be triggered manually (via contact-closure) or automatically
(via signal present). Restore Defaults opens a pop-up menu, which allows the
Mute 1 / Mic 1 options (or all Configuration Options) to be set back to their
factory defaults. Help provides additional instruction. Close will return you
to the Mix screen.
11
SETUP
MUTE 2 / MIC 2 SCREEN The Configuration Options screen is accessed through the
Configure SPM723 menu, and the Mute 2 / Mic 2 tab on the Configuration Options
screen is then used to select options which customize the function of the
Mic/Line 2 Mute terminal (see Front & Rear Panel Features on pg. 3). Mute 2
Input Causes Gated Operation of Mic 2 toggles assignment of gating to the
Mic/Line 2 signal. Gating allows that mic/line input signal to remain off,
until triggered on either manually (via contact-closure) or automatically (via
signal present) at the Mute 2 terminal. Mute 2 Input Causes Page-Over Duck of
the Main Program Source toggles assignment of ducking at the Main Output. Mute
2 Input Causes Page-Over Duck of the Zone Program Source toggles assignment of
ducking at the Zone Output. Ducking is a temporary attenuation of the stereo
Line Input 1~7 signals at that output, which is triggered manually (via
contact-closure) or automatically (via signal present) at the Mute 2 terminal.
NOTE: A Mic/Line Input must be enabled before it can trigger ducking (see
Mic/Line Screen on pg. 6). Mute 2 Hold Time opens a drop-down menu of 256 hold
time choices (0~63.75 seconds). NOTE: Hold Time determines how long mute
functions remain in effect after triggering (manual or automatic) is released.
Hold Time is not the same as Ramp Rate, which determines how fast a signal
returns to normal after Hold Time has elapsed. Mute 2 Behaves Like a
Programmable Logic Input will disable the Mute 2 functions described above,
and instead allow the Mute 2 terminal to be used as a logic input, which can
then be programmed like a remote control button (see Setup on pg. 8). However,
a logic input can have two button definitions’, one for when the circuit is closed’ (activated) and another for when the circuit is opened’ (released). Therefore, drop-down menus of the forty possible control buttons are provided for both theclosing’ & the `opening’ of the logic input circuit. The logic
input can still be triggered manually (via contact-closure) or automatically
(via signal present). Restore Defaults opens a pop-up menu, which allows the
Mute 2 / Mic 2 options (or all Configuration Options) to be set back to their
factory defaults. Help provides additional instruction. Close will return you
to the Mix screen.
12
SETUP
CHANNEL 7 OVERRIDE SCREEN The Configuration Options screen is accessed through
the Configure SPM723 menu, and the Channel 7 Override tab on the Configuration
Options screen is then used to select options which customize the function of
the Override terminal (see Front & Rear Panel Features on pg. 3). When Channel
7 Override is released, the previously selected Stereo Line Inputs for each
output will again be selected. However, these signals will initially be
attenuated, and will then return to their normal levels as determined by the
following parameters. Main Duck Amount & Zone Duck Amount open drop-down menus
of 41 attenuation choices (0dB~80dB) for the stereo Line Input signals at the
associated output. Main Duck Ramp Rate & Zone Duck Ramp Rate open drop-down
menus of 200 return rate choices (1dB~200dB per second) for the stereo Line
Input signals at the associated output. Override Hold Time opens a drop-down
menu of 256 hold time choices (0~63.75 seconds). NOTE: Hold Time determines
how long override remains in effect after triggering (manual or automatic) is
released. Hold Time is not the same as Ramp Rate, which determines how fast a
signal returns to normal after Hold Time has elapsed. Ch.7 Override Input
Behaves Like a Programmable Logic Input will disable the Channel 7 Override
functions described above, and instead allow the Override terminal to be used
as a logic input, which can then be programmed like a remote control button
(see Setup on pg. 8). However, a logic input can have two button definitions’, one for when the circuit isclosed’ (activated) and another for
when the circuit is opened’ (released). Therefore, drop-down menus of the forty possible control buttons are provided for both theclosing’ & the
`opening’ of the logic input circuit. The logic input can still be triggered
manually (via contact-closure) or automatically (via signal present). Restore
Defaults opens a pop-up menu, which allows the Channel 7 Override options (or
all Configuration Options) to be set back to their factory defaults. Help
provides additional instruction. Close will return you to the Mix screen.
13
LOGIC INPUTS
Eight Logic Inputs are available on a rear panel 9-pin Sub-D (female)
connector. Logic Inputs allow remote control of the SPM723 via external
circuits, such as switches, contact-closures, active driver circuits, and/or
open-collector’ logic outputs. From the factory, Logic Inputs 1~8 have no pre-programmed function. However, each Logic Input may be assigned different actions’ using the BiampWin software and serial cable provided with the
SPM723 (see Setup on pg. 9). Since Logic Inputs are controlled by switches,
contact-closures, etc., each Logic Input may be assigned two functions (one
for switch closed’ and one for switchopen’).
Logic Inputs have the following pin assignments (right-to-left & top-to-
bottom): Pins 1~8) Logic Inputs 1~8; Pin 9) Ground.
54321 9876
logic inputs
pin #1 = Logic Input 1 pin #2 = Logic Input 2 pin #3 = Logic Input 3 pin #4 = Logic Input 4 pin #5 = Logic Input 5
pin #6 = Logic Input 6 pin #7 = Logic Input 7 pin #8 = Logic Input 8 pin #9 = ground
When nothing is connected to a Logic Input, an internal pull-up resistor keeps
it at a high’ idle state (+5.0 VDC). The Logic Input is activated when its input goeslow’ (less than +0.8 VDC), and is de-activated when its input goes
high’ (greater than +2.4 VDC). A Logic Input is controlled in one of three ways: 1) Use an NPN styleopen-collector’ logic output from an external
device (such as a BIAMP PMX84 or DRC4+4) to short the Logic Input to ground.
2) Use a switch, relay, or other contact-closure (such as from a third-party
controller) to short the Logic Input to ground. 3) Use an active TTL output
driver circuit (such as from a third-party controller) to actively drive the
Logic Input to a high’ orlow’ state.
Multiple contact-closures or `open-collector’ logic outputs may be wired in
parallel to a single Logic Input (see diagram below). Logic Outputs and
contact-closures should be rated for at least 5 Volts / 1mA operation. Low-
current / dry-contact closures are recommended for reliability. Active output
driver circuits should not exceed a signal range of 0~5 Volts DC, and should
have a minimum pulse width of 100 milli-seconds. Logic Input impedances are
approximately 10k ohms.
multiple switches to single Logic Input
14
LOGIC OUTPUTS
The SPM723 provides eight logic outputs on a rear panel 9-pin Subminiature D (male) connector. Logic Outputs can be used to control external circuits such as relays, indicators, etc. (see diagrams below). However, the SPM723 Logic Outputs are most often used to provide simultaneous audio & video source selection, by controlling an external video switching device which has logic inputs or other means of control via external contact-closures (logic outputs). Multiple Logic Outputs may be combined (wired in parallel) to control a single circuit.
The SPM723 Logic Outputs are open collector’ outputs. Each Logic Output is an NPN transistor with the collector being the output and the emitter being ground (see diagram below). When a Logic Output is turned on, the transistor provides a path for DC current to flow. The Logic Outputs do not provide any voltage or current. They act only as switches (with a common ground return). To activate external relays, an external power supply must be used (see diagram below). The Logic Output transistors are rated up to a maximum of 24 VDC and 50 mA per output (24 volt relay coils maximum). However, +12 Volts DC is sufficient power for most applications. When using the Logic Outputs to control relays, protection diodes must be used to suppress high voltage transients that are generated when the relays turn off (see diagram below). Any of the 1N4004 family of diodes (1N4001, 1N4002, 1N4003, 1N4004, 1N4005, 1N4006, 1N4007, or equivalent) will provide proper protection. When a Logic Output goes on, the associated relay may be wired to perform on, off, or ‘A/B’ switching functions. To use logicon’ to turn on (or activate) a device, wire
across the normally open’ relay contacts, in series with the device (or control voltage source). To use logicon’ to select between A’ orB’
signals (inputs or outputs), wire one signal to the normally closed’ relay terminal and the other signal to thenormally open’ relay terminal, with the
common relay terminal providing the feed (input or output).
12345 6789
logic outputs
logic out Logic Out 1 Logic Out 2 Logic Out 3 Logic Out 4 Logic Out 5 Logic
Out 6 Logic Out 7 Logic Out 8
ground
pin number pin #1 pin #2 pin #3 pin #4 pin #5 pin #6 pin #7 pin #8 pin #9
5 9
4
8
3 7
2 6
1
9-pin cable-end
SPM723
Logic Output #1
Logic Output Controlling Relay
Pin #1
+12 Volts DC Power Supply
-+
Pin #9
1N4004 Diode
12V Relay
Contacts
normally closed common
normally open
Coil
SPM723
Logic Output #1
Logic Output Controlling LED Indicator
Pin #1
+12 Volts DC Power Supply
-+
Indicator Panel
1.2k ohms
LED Pin #9
15
RS-232 CONTROL
The SPM723 has an RS-232 Serial Port, which allows it to be controlled by a computer (see Front & Rear Panel Features on pg. 2). In addition to the BiampWin software, the SPM723 offers two other methods of computer control.
Control Button Emulation: This method allows the computer to imitate the operation of an infrared transmitter or wall-mount control panel. Although the SPM723 does not accept infrared or wall-mount remote controls itself, it can still receive ASCII characters (via RS232) which emulate the buttons on these types of remote controls. From the factory, remote control buttons have equivalent ASCII characters permanently assigned to them (see table below). Therefore, actions can be assigned to remote control buttons in the same way they are assigned to Logic Inputs. Then, using this method, the computer can output ASCII characters which are equivalent to the commands generated by those standard remote control buttons. Control Button Emulation allows the computer to utilize up to forty button definitions (unlike standard remote controls, which have only twenty-eight buttons).
Advanced Computer Control: This method provides advanced commands, which allow the computer to retrieve or edit various SPM723 settings. The computer may also emulate control buttons. Using this method, the computer may designate up to sixty-four devices, and may also provide `real-time’ display of various settings.
This manual only describes the Control Button Emulation method of computer control. For details regarding Advanced Computer Control, please download the SPM723 Computer Control manual (723host.PDF) from the `resources’ page of our web site (www.biamp.com).
Each control button on an infrared transmitter or wall-mount control panel corresponds to one character in the standard ASCII character set. The character equivalents are summarized in the following table. This table includes all forty possible buttons, their button numbers, their ASCII code equivalents, and their factory default button definitions (no operation assigned).
button 01 B no operation assigned button 02 C no operation assigned button 03 D no operation assigned button 04 E no operation assigned button 05 F no operation assigned button 06 G no operation assigned button 07 H no operation assigned button 08 I no operation assigned button 09 J no operation assigned button 10 K no operation assigned button 11 L no operation assigned button 12 M no operation assigned button 13 N no operation assigned button 14 O no operation assigned
button 15 P no operation assigned button 16 Q no operation assigned button 17 R no operation assigned button 18 S no operation assigned button 19 T no operation assigned button 20 U no operation assigned button 21 V no operation assigned button 22 W no operation assigned button 23 X no operation assigned button 24 Y no operation assigned button 25 Z no operation assigned button 26 [ no operation assigned button 27 no operation assigned button 28 ] no operation assigned
button 29 ^ no operation assigned button 30 _ no operation assigned button 31 ‘ no operation assigned button 32 b no operation assigned button 33 c no operation assigned button 34 d no operation assigned button 35 e no operation assigned button 36 f no operation assigned button 37 g no operation assigned button 38 h no operation assigned button 39 i no operation assigned button 40 j no operation assigned
The computer can initiate any functions or actions that a standard control
can, by simply transmitting the equivalent control button ASCII character.
When interfacing the SPM723 to a computer, the computer must be aware that the
SPM723 will echo’ all characters it receives (both from computer and Logic Inputs) via the Serial Port Transmit Data (TXD) output signal. However, from the factory, the SPM723 Logic inputs are programmed with noecho character’
assigned to them.
16
RS-232 CONTROL
Serial Port: The 9-pin Sub-D (male) connector on the SPM723 rear panel provides the RS-232 compatible serial interface signals used for computer control. The SPM723 Serial Port transmits serial data on pin 3 (TxD), receives serial data on pin 2 (RxD), and provides a ground on Pin 5. The Data Terminal Ready (DTR) & Request To Send (RTS) output signals are connected to the +12 Volt power supply (through a resistor) and are always asserted when the SPM723 power is on. NOTE: The Serial Port may also transmit commands which are received via the Logic Inputs, depending upon the echo character assignments (see Setup on pg. 9).
12345 6789
serial port
pin #1 = not used pin #2 = Receive Data (RxD) input pin #3 = Transmit Data (TxD) output pin #4 = Data Terminal Ready (DTR) output pin #5 = ground
pin #6 = not used pin #7 = Request To Send (RTS) output pin #8 = not used pin
9 = not used
The SPM723 only requires receive data (pin 2), transmit data (pin 3), and signal ground (pin 5) to be connected for successful data communications (see cable diagram below). However, the PC may require that signals be present on the data set ready, clear to send, or carrier detect inputs, as well as the receive data, transmit data, and signal ground pins. Success or failure depends entirely on the actual computer hardware and software being used. When trying to solve an interfacing problem, the most important thing to remember is that an output of one device should connect to one or more inputs of the other device, and that two outputs should never be connected together. Also, keep in mind that the RS-232 specification calls for the cable length to be no greater than 50 feet (although it is not unusual to be able to operate over distances of 150 to 250 feet), and the connectors must be of the appropriate gender (male or female) to mate properly. For best results, a shielded cable should be used, with the shield connected to chassis ground. Since the SPM723 serial interface ground is also tied (indirectly) to the analog signal ground, undesirable ground loops may occur when the SPM723 is connected to a PC (if the system grounding is not carefully designed). For best performance, the PC ground and the chassis ground of the SPM723 should be at the same potential, and the PC should get AC power from the same source as the SPM723 (and any other audio equipment which is connected to the SPM723). Since most lap-top computers are isolated from earth ground, this should rarely pose a problem.
Serial Port Data Communications Parameters: The SPM723 communicates through the Serial Port at the factory default rate of 38400 bits per second, with 8 data bits, 1 stop bit, and no parity. The SPM723 utilizes a subset of the standard 7-bit ASCII character set. The eighth data bit of each character (the most significant bit) should always be 0. The computer should not echo the characters it receives. The computer should not be set for either hardware (DTR) or software (XON/XOFF) flow control. The baud rate may be changed to either 2400, 9600, or 19200 bits per second by means of the software (see Setup on pg. 4). NOTE: Baud rate may need to be changed when the SPM723 is being used in RS-232 systems with other products having a lower maximum baud rate.
Link Port Connections: The 9-pin Sub-D (female) connector on the SPM723 rear panel provides the RS-232 compatible serial interface signals used for linking multiple BIAMP® products within a system. The Link Port of one device simply connects to the Serial Port of the next device, and so forth (see diagram below). Link cables are available as an option (Biamp #909-0057-00). NOTE: All but the final device in a system should have its `Link’ switch pressed in (see Front & Rear Panel Features on pg. 2). The Link Port may also transmit commands which are received via the Logic Inputs, depending upon the echo character assignments (see Setup on pg. 9).
54321 9876
link port
pin #1 = not used pin #2 = Transmit Data (TxD) output pin #3 = Receive Data (RxD) input pin #4 = not used pin #5 = ground
pin #6 = not used pin #7 = not used pin #8 = not used pin #9 = not used
PC
CD RxD TxD DTR gnd DSR RTS CTS
RI
serial port Serial Cable serial port SPM723
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
(shield)
1
1 n/a
2
2 RxD
3
3 TxD
4
4 DTR
5
5 gnd
6
6 n/a
7
7 RTS
8
8 n/a
9
9 n/a
male female
female male
SPM723 link port
n/a 1
1
TxD 2
2
RxD 3
3
n/a 4
4
gnd 5
5
n/a 6
6
n/a 7
7
n/a 8
8
n/a 9
9
female male
Link Cable serial port unit 2
(shield)
1
1 n/a
2
2 RxD
3
3 TxD
4
4 DTR
5
5 gnd
6
6 n/a
7
7 RTS
8
8 n/a
9
9 n/a
female male
17
SPECIFICATIONS & BLOCK DIAGRAM
__ SPECIFICATIONS
Frequency Response (20Hz-20kHz @ +4dBu):
+0/-0.5dB
THD + Noise (20Hz-20kHz @ +4dBu):
< 0.05%
Output Noise (20Hz-20kHz @ nominal levels):
< -73dBu
Equivalent Input Noise (20Hz-20kHz, 150 @ Mic/Line Input):
-127dBu
Maximum Gain (Mic/Line Input to Main/Zone Outputs):
75dB
Input Trim Gain Range:
Mic/Line Inputs
+60dB to -6dB
Input Impedance:
Mic/Line Inputs (balanced)
6.6k ohms
Stereo Line Inputs 1~6 (unbalanced)
10k ohms
Line Input 7 (stereo/unbalanced)
10k ohms
Line Input 7 (mono/balanced)
20k ohms
Maximum Input:
Mic/Line Inputs (balanced)
+24dBu
Stereo Line Inputs 1~6 (unbalanced)
+18dBu
Line Input 7 (stereo/unbalanced mono/balanced)
+18dBu
Output Impedance: Main Output (balanced) Zone Output (balanced) Aux Output
(balanced)
Maximum Output: Main Output (balanced) Zone Output (balanced) Aux Output
(balanced)
Phantom Power (Mic/Line Inputs only): Power Requirements: Power Consumption:
Dimensions:
height (1 rack space) width depth Weight:
200 ohms 200 ohms 200 ohms
+24dBu +24dBu +24dBu +24 Volts DC 110/220VAC 50/60Hz 27 Watts max.
1.75 inches (89mm) 19 inches (483mm) 11 inches (191mm)
< 10 lbs. (3.86kg)
stereo line input (1~5)
x5 stereo line input 6
main zone
main aux
zone
surround
stereo line
main
+6dB
input 7
mono/
stereo zone
SPM723 Block Diagrm
main
EQ
zone
EQ
main
mic/line input 1
trim hpf EQ
zone
+24V
main
mic/line
input 2
trim hpf EQ
zone
aux output source select
mono/ stereo
main output
mono/ stereo
zone output
switches and
controls
serial in/out
uC
mute logic mic 1 mic 2 ch. 7
logic out
8
logic in
8
mic 1 mic 2 ch 7 main zone aux
meter inputs
EQ
mono/ stereo
aux output
+24V
18
WARRANTY
BIAMP SYSTEMS IS PLEASED TO EXTEND THE FOLLOWING 5-YEAR LIMITED WARRANTY TO THE ORIGINAL PURCHASER OF THE PROFESSIONAL SOUND EQUIPMENT DESCRIBED IN THIS MANUAL
1. BIAMP Systems warrants to the original purchaser of new products that the
product will be free from defects in material and workmanship for a period of
5 YEARS from the date of purchase from an authorized BIAMP Systems dealer,
subject to the terms and conditions set forth below.
2. If you notify BIAMP during the warranty period that a BIAMP Systems
product fails to comply with the warranty, BIAMP Systems will repair or
replace, at BIAMP Systems’ option, the nonconforming product. As a condition
to receiving the benefits of this warranty, you must provide BIAMP Systems
with documentation that establishes that you were the original purchaser of
the products. Such evidence may consist of your sales receipt from an
authorized BIAMP Systems dealer. Transportation and insurance charges to and
from the BIAMP Systems factory for warranty service shall be your
responsibility.
3. This warranty will be VOID if the serial number has been removed or
defaced; or if the product has been altered, subjected to damage, abuse or
rental usage, repaired by any person not authorized by BIAMP Systems to make
repairs; or installed in any manner that does not comply with BIAMP Systems’
recommendations.
4. Electro-mechanical fans, electrolytic capacitors, and normal wear and tear
of items such as paint, knobs, handles, and covers are not covered under this
warranty.
5. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.
BIAMP SYSTEMS DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING,
BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
6. The remedies set forth herein shall be the purchaser’s sole and exclusive
remedies with respect to any defective product.
7. No agent, employee, distributor or dealer of Biamp Systems is authorized
to modify this warranty or to make additional warranties on behalf of Biamp
Systems. statements, representations or warranties made by any dealer do not
constitute warranties by Biamp Systems. Biamp Systems shall not be responsible
or liable for any statement, representation or warranty made by any dealer or
other person.
8. No action for breach of this warranty may be commenced more than one year
after the expiration of this warranty.
9. BIAMP SYSTEMS SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS OR LOSS OF USE ARISING OUT OF
THE PURCHASE, SALE, OR USE OF THE PRODUCTS, EVEN IF BIAMP SYSTEMS WAS ADVISED
OF THE POSSIBILITY OF SUCH DAMAGES.
Biamp Systems 10074 S.W. Arctic Drive Beaverton, Oregon 97005
503-641-7287
585.0160.00
Declaration of Conformity
Biamp Systems, Inc., as the manufacturer, hereby declares that the following
described product, in our delivered version, complies with the provisions of
the DIRECTIVES except as noted herein. In case of alteration of the product,
not agreed upon or directed by us, this declaration is no longer valid.
Product Model: ADVANTAGE SPM723 Product Description: Digitally Controlled Stereo Preamp/Mixer
Applicable EC Directives: EMC Directive (89/336/EEC), LVD Directive (73/23/EEC)
Applicable Harmonized Standards: EN55103-1 emissions EN55103-2 immunity EN60065 safety
Special Considerations for Product Environment or Compliance:
Shielded cabling must be used for system connections. The apparatus is deemed incapable of producing harmonic emissions or flicker levels sufficient enough to interfere with other apparatus as noted in EN61000-3-2 and EN61000-3-3.
This apparatus operates from a removeable external power source at voltages below the levels encompassed by the LVD. The external power source complies with the applicable requirements of EN60065. The apparatus itself is outside of the scope of the LVD and presents no hazardous voltages, as defined in the LVD. For compliance, the apparatus shall be powered only from the separate CE marked Biamp Systems power source.
RF interference conducted through interconnect cabling may cause varying degrees of random signal degradation. The effect of increased noise or distortion due to this interference is typically masked by the desired signal. In no instance is operation inhibited.
The Technical Report/File is maintained at:
Biamp Systems, Inc. 10074 S.W. Arctic Drive Beaverton, OR USA 97005 phone: 503-641-7287 fax: 503-626-0281 e-mail: biamp@biamp.com
Authorized Representative: Steven Hedgepeth
Authorized Representative Signature: Issued: June, 2000
References
- Biamp - Connecting People Through Extraordinary Audiovisual Experiences
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