spl 2489 Surround Monitor Controller User Manual
- June 5, 2024
- spl
Table of Contents
User Manual
Surround Monitor Controller
Model 2489
Model 2489
One-point stereo and 5.1 Volume control, source and speaker management 5.1
Manual Surround Monitor Controller SMC
Model 2489
Version 1.0 – 6/2004
R & D: Wolfgang Neumann
The information in this document has been carefully compiledand verified and
is assumed to be correct. However, Sound Performance Lab (SPL) reserves the
right to modify the product described in this manual at any time without
prior notice. This document is the property of SPL and may not be copied or
reproduced in any manner, in part or fully, without prior authorization by
SPL
Limitation of Liability:
In no event shall SPL be liable for any damages, including loss of data, lost
profits, cost of cover or other special, incidental, consequential or indirect
damages arising from the use of the unit, however caused and on any theory of
liability. This limitation will apply even if SPL or an authorized dealer has
been advised of the possibility of such damage
Introduction
The SPL Surround Monitor Controller (SMC) is a one-point analog volume control and switching matrix for system-independent 5.1 SUrround and stereo monitoring. Designed to provide only the necessary functions with excellent audio quality, the SMC offers a uniquely cost-effective stereo and surround speaker and source management solution for essentially any audio application
• Surround and stereo production
• DVD-V, DVD-A, SACD and DTS authoring
• Film and video postproduction
• Video and game production
• A/V and multimedia production
• Audiophile home entertainment systems
The advantages of the SMC become especially apparent in combination with modern audio and video production tools such as ProTools™, Nuendo™, Cubase™, Logic™, Deck™, etc. Monitor levels and source management can be handled independently of the software and with virtually no loss in quality. You no longer need to set up additional aux sends or an alternative surround master for monitoring. In addition, you won’t have to worry about over- or underdriving the converters due to monitor levels.
One of the SMC’s biggest advantages is the possibility to manage several input sources: comparing and monitoring SACD or DVD material is much easier than having to import all of your audio files and set up monitor mixes – not to mention the conversion of multichannel audio.
Surround Monitor Controller 2489
Standard A/V receivers are often used for this task. The problem with this is that the audio has to be either AD/DA converted or manipulated by signal- degenerating control circuitry (VCAs, DACs etc.) for volume control, so you never hear the unadulterated audio – especially frustrating when you’re working on SACD or DVD-A projects.
In addition to a surround speaker set, a stereo pair can be connected to and managed by the SMC. A Sub-D input connector provides six surround and two stereo input channels. Eight additional RCA connectors allow easy connection of SACD, DVD, CD or DAT players. A slave output allows the stereo or surround input signal to be routed directly to a recording device. Volume control is handled by a discrete six-layer potentiometer and all switching functions by extremely durable precision push buttons.
SPL’s renowned electronic balancing circuitry forms the basis for the SMC’s I/O architecture. Its extended frequency range up to 100 kHz, exceptional dynamic spectrum and excellent common mode rejection ensure specs that exceed SACD standards, as only highest quality analog circuitry can provide.
The SMC’s rugged and ergonomic steel-blue desktop enclosure with its slanted front panel harmonizes perfectly with desktop production environ- ments.
Surround Monitor Controller 2489
IMPORTANT:
Before connecting the SMC or any other equipment turn off all power at all units.
It makes good sense to think about where you place your SMC before connecting it. It should be positioned so that you can easily reach it, but there are other considerations. Try not to place it near heat sources or in direct sunlight, and avoid exposure to excessive vibrations, dust, heat, cold or moisture. It should also be kept away from transformers, motors, power amplifiers and digital processors. In addition,please:
- Do not open the case. You may risk electric shock and damage to your equipment.
- Leave repairs and maintenance to a qualified service technician. Should foreign objects fall inside the case, contact your authorized dealer or support person.
- To avoid electric shock or fire hazards, do not expose your unit to rain or moisture.
- In case of lightning, unplug the unit. Always unplug the cable by pulling on the plug only; never pull on the cable.
- Never force a switch orknob.
- Use a soft, lint-free cloth to clean the case. Avoid cleaning agents as they may damage the unit.
Power Supply
The SMC’s power supply was carefully engineered to provide clean and consis-
tent current – an important prerequisite for excellent audio. Built around a
toroidal transformer, the power supply generates a minimal electromagnetic
field with no hum or mechanical noise. The output side is filtered by an RC
circuit to extract noise and hums inherent in commercial AC power.
All audio-related components are fed by two separate voltage regulators to
minimize disturbance from other components.
An AC power cord is included for connection to the standard 3-pron g IEC
connector. The transformer, power cord and IEC connector are VDE, UL and CSA
approved. The AC fuse is rated at 315mA (230V version) or 630mA (115V
version).
Rear panel/connections
Graphics courtesy of TASCAM Germany (www.tascam.de) and Christian Preissig, media dell‘ arte – text&ton, E-Mail: [email protected]
The SMC enclosure is EMC-safe and effectively shielded against HF
interference.
Nonetheless, you should carefully consider where you place the unit to avoid
electrical disturbances. The SMC and all devices to be connected should be
turned off before connections are made or change to avoid damage to your
speakers and ears.
Inputs and outputs
INPUT A & INPUT C (Sub-D 25; analog)
This Sub-D connector provides balanced connections for INPUT A & INPUT C
(INPUT A for six surround channels, INPUT C for two stereo channels). Use this
connector for your multichannel source, i.e. DAW or DA converter.
SLAVE OUT (Sub-D 25; analog)
The SLAVE OUT provides a direct output of the INPUT A & INPUT C signals for
connection to external equipment e.g. recorders, leaving the converter outputs
free.
INPUT B & INPUT D (RCA)
Eight RCA input connectors are available for six surround channels and two
stereo channels. INPUT B provides surround connection for SACD or DVD players,
while INPUT D provides connection for stereo sources such as DAT or CD
players.
Tip: If a recording device is connected to the SLAVE OUT, its outputs can
be connected to INPUT B for tape monitoring purposes.
SURROUND and SPEAKER OUTPUTS (1/4“ TRS)
Eight balanced, 1/4″ TRS connectors allow connection of a six-channel surround
speaker set and a stereo speaker pair. Use standard mono 1/4” plugs for
unbalanced connections.
Sub-D 25 connector pin configuration
The pin configuration complies with the TASCAM standard.
Operation
Volume Control
The volume is centrally controlled for all channels via a discrete six-level
potentiometer with an extremely linear curve. The potentiometer controls the
audio signals directly without any signal-degenerating circuitry such as VCAs
or DACs, which tend to create tolerances between channels as well as
distortion. The white circle with the potency scale can be easily marked
using a pencil.
Source Buttons Surround A/B and Stereo C/D
The source buttons Surround A/B and Stereo C/D allow easy switching between
surround and stereo sources (inputs). Two surround and two stereo sources are
available.
The middle button selects between surround and stereo sources. When depressed
(in), the stereo sources are active; when not depressed (out) the surround
sources are selected.
The left button selects either surround source A (out) and B (in), while the
right button selects either stereo source C (out) or D (in).
Monitor Mode Buttons (Mono, Dim, Mute All)
The Monitor Mode buttons provide various monitoring functions: MONO L/R, MONO
LS/RS, DIM -20 and MUTE ALL.
MONO L/R and MONO LS/RS switches the front L and R channels and the rear LS
and RS channels to mono, respectively, and can be used to check phase
correlation. The MONO LS/RS mode has no effect when a stereo speaker pair is
selected.
DIM lowers the monitor volume by -20 dB without changing the volume pot
setting, for example to control a mix at low volume (or to answer the phone…).
MUTE ALL does exactly what it says: it mutes all speaker outputs.
Speaker Buttons
The speaker buttons enable each surround speaker output (L, C, R, LS, RS,
LFE) and the stereo pair output to be switched on (pressed) and off
independently.
Tip: If you are not using a surround speaker set, you can connect two
stereo speaker pairs to the SMC. Simply connect one pair to the Stereo Speaker
Outputs and the second pair to the Surround Speaker Outputs L and R.
Technical Specifications
Input Impedance
Balanced
Unbalanced
Output Impedance
Balanced
THD+N
-10 dB (Input level0 dB
+10 dB
+18 dB
+22 dB
Noise, A-weighted
Maximum Input Level
Dynamic Response
Common Mode Rejection
@ 100 Hz
@ 1 kHz
@ 10 kHz
@ 100 kH
Frequency Response
Phase
Phase (linear)
Dimensions
Weight| (Sub-D) 50kOhms
(RCA) ›10 kOhms
(1/4“ TRS) ‹600 Ohms
0.04 %
0.01 %
0.006 %
0.002 %
0.1 %
-98 dB
+22 dB
120 dB
›70 dBu
›70 dBu
›60 dBu
›50 dBu
10 Hz-100 kHz (-3 dB)
-36° (10 Hz-120 kHz, -3 dB center frequency)
20 Hz-100 kHz
91 x 272 x 220 mm (3 9/16″ x 10 11/16″ x 8 21/32″)
2.3 kg (5 lbs)
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SPL reserves the right to make technical changes without prior notice. SPL
Warranty
All SPL products come with a two-year manufacturer’s guarantee against defects
in material or assembly from the date of purchase.
End users are supported in the two-year guarantee through their distributor or
dealer. In such cases, please contact your dealer for full guarantee
conditions and service.
Direct SPL product support requires product registration. Please fill out the
guarantee card enclosed in the package legibly in printed letters and send it
directly to SPL.
Or use the online registration form that may be reached at www.soundper-
formancelab.com (international clients)
or www.spl-usa.com (US clients).
Notes ____
< Manual SMC, Model 2489
Surround Monitor Controller 2489
Documents / Resources
| spl
2489 Surround Monitor
Controller
[pdf] User Manual
2489, Surround Monitor Controller, 2489 Surround Monitor Controller,
Controller, Monitor Controller
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References
- SPL – Sound Performance Lab
- SPL USA Online Store – SPL USA Online Store
- Tascam Europa | Audio-Aufnahmegeräte für Rundfunk, Tonstudio und Musiker