Velodyne CT-I00/120 Subwoofer Owner’s Manual

: June 3, 2024
: Velodyne

Table of Contents

CT-I00/120 Subwoofer
Product Features & Controls
Installation
Line-level connection
Speaker-level connection
Interconnect cables
Placement
Care of your subwoofer
Troubleshooting & Service
Documents / Resources

CT-I00/120 Subwoofer
**Owner’s Manual

**

CT-I00/120 Subwoofer

Caution

To reduce the risk of electric shock, do not remove the cover (or back). No user-serviceable parts inside. Refer servicing to qualified service personnel.
The fighting flash with the arrowhead symbol is intended to alert the user to the presence of uninsulated ‘dangerous voltage’ within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the subwoofer.

Read Instructions – All safety and operating instructions should be read before the subwoofer Ls is operated
Retain Instructions – The safety and operating instructions should be retained for future reference.
Heed Warnings All warnings on the sulivocifer and in the operating instructions should be adhered to.
Follow Instructions – Al operating art use instructions should be followed
Water and Moisture- The subfolders houldnotbe used near water- form: ample, near a valuation. washbowl. kitchen sink, laundry tub, in a wet basement near a swimming pool, or the lice.
Ca itsand Stands -The subwoofers should be used only with a cardstock recommended by the manufacturer.
Wall or Ceiling Mounting – The stbmoler should be mounted to a wall or ming only as recommended by the manufacturer.
Ventilation – The subwoofer should be situated so that its location or position does not interfere with its proper ventilation. For example. the subwoofershotid not be situated on a bed or sofa. rug. or Miler surface that may docelhe vernalization openings or place in an installation such as a bookcase or about that may impede the ricer of air through the ventilation openings.
Heat – The subwoofer should be situated away from heat sources such as radiators. neat registers, stoves, or other subwoofers that produce heat.
Power Sources – The subwoofer should be connected to a poise( supply only of the type described O the operating instructions or as marked on the subwoofer.
Power-Cord Protection – Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point at vetch they exit from the subwoofer.
Caution: To prevent electrical shock, match the wide blade of the plug to be widely fully inserted.”Alcention: Pour eviter les chops electriques, introdulre tame la plus large de la fiche dans la bonne correspondante de Is prise et pousserjusguau fond’.
Cleaning – The subwoofer shard is cleaned only as recommended by the manufacturer.
Nonuse Periods- The power cord of the subwoofer should be unplugged from the Me outlet when left unused for a long period of time.
Object and Liquid Entry Care should be taken so that objects do not! al and kids are not spied on in the enclosure.
Damage Requiring Service – The smoother should be serviced by qualified service personnel when
a power-supply cord or pug has been damaged.
b. Objects have Wen or ficpuid has been spied Into the subwoofer
c. The subwoofer has been exposed to run it.
d. The subwoofer does not appear to operate normally or exhibits a marked Marge in performance.
e. The subwoofer has been dropped or damaged.
Serving – The user staid not attempt to service the sat/wader beyond what is described in the operating instructions.
All other services should be referred to guarded service personne4

Congratulations!

Congratulations on your purchase of a Velodyne subwoofer sys them, This system represents the state of the art in low-frequency reproduction, Read and follow the instructions below to ensure safe and proper system operation,
Warning!
To prevent fire or shock hazards, do not expose this equipment to rain or moisture. To avoid electrical shock, do not open the speaker enclosure or amp chassis cover. Please observe all warnings on the equipment itself. There are no user-serviceable parts inside. Please refer all service questions to your authorized Velodyne dealer.
Prior to installation
Please unpack the system carefully, Remove all staples used to seal the carton as they can scratch the cabinet. Please save the carton and all packaging materials for future use, Record the serial number in the space provided on the warranty card for future reference,

Product Features & Controls

Built-in 100-watt (RMS) power amplifier (CT -100)
Built-in 120-watt (RMS) power amplifier (CT -120)
Subwoofer Direct – switchable crossover bypass
Adjustable (40 to 120hz) low-pass crossover
Selectable (80 or 100hz) high-pass crossover (CT -120)
85 Hz high-pass crossover (CT -100)
Line-level inputs & outputs
Speaker-level inputs & outputs
Signal sensing auto turn on/off with bypass option
Variable volume control
Selectable phase control (0 or 180 degrees)
Dual staggered low-pass crossover; 12dB/ octave initial, 24dB/octave ultimate
Anti-clipping circuit
Over-excursion protection

Installation

Your new subwoofer system provides a number of installation options, Read all the installation information below in order to determine which installation option is best for your system, Re member to perform all installation procedures with system power turned off,
Inputs
Your new subwoofer is equipped with both speaker-level and line-level inputs, Use the LINE-IN jacks when connecting your sub woofer to a pre-amp, signal processor, or line-level crossover, The FROM AMPLIFI ER jacks connect directly to the speaker outputs of an integrated amplifier or receiver. Your amplifier section will notice no additional loading effects when you use these inputs because of their high impedance,
Note
Do not use both LINE-IN and FROM AMPLIFIER inputs simulta neously,
Volume control
This control allows you to balance the output from the subwoofer to the main speakers in your system, This control should be set to achieve a similar volume level from both the main speakers and subwoofer,
Low-pass crossover
Both sets of inputs sum the left and right channels together and the resulting signal is passed through an adjustable low-pass crossover before being amplified, The crossover control allows you to adjust the upper limit of the subwoofe~s frequency response from 40 to 120 Hz, The subwoofe~s response will begin rolling off above the frequency you set this control to,
You should set the crossover frequency to obtain a smooth and seamless transition from the subwoofer to the main speakers in your system, If your main speakers are smaller units with limited low-frequency output, you may wish to choose a higher frequency (such as 100-120hz) than you would with larger speakers which have greater low-frequency output. With larger speakers, you might start with this control set lower, such as 80hz,

Subwoofer Direct

A bypass switch is also provided if you wish to use an external crossover. If you are not using an external crossover, we recommend that you use the one provided within the unit for optimum performance.

Phase adjustment- 07180.
This control allows you the “reverse the phase of the subwoofer’s output signal 180′ to correct for any possible mismatch & resulting cancellation between the subwoofer and your main speakers/ amplifier. To adjust, simply listen to the system with music playing. Then move the switch from one position to the other and listen for a change in low-frequency output. The correct position will have a greater amount of apparent low-frequency output.

Auto turn-on function
With this function in the “auto’ position, your CT-100 or CT-120 can be safely left with the main power switch on continuously. The subwoofer will turn itself on automatically when an audio signal is present. If no signal is present for approximately 15 minutes, the unit will switch to standby mode. While in standby mode, your subwoofer will draw very minimal power. This function can be disabled by leaving the switch in the °on’ position.
High pass crossover switch
(CT-120) This switch selects the frequency for the high pass crossover. This crossover is functional on both line and speaker-level outputs. Smaller speakers with limited low-frequency output may prefer the higher 100hz setting which will reduce the low frequencies sent to them. Larger speakers with greater low-frequency output may be able to handle the 80hz setting without strain.
Power switch
The master power switch is located on the right half of the unit. This rocker- style switch is the main on/off for the unit. This switch should be set to position 1 for on (up), and 0 for off (down).

Line-level connection

Figure 1 shows a connection to a pre-amp ifs main outputs and returning them to your amplifier inputs.
When installed in this fashion, your satellite speakers will be crossed over at 80/1 OOHz (or 85Hz for CT -100) which removes the lower bass from your amplifier and speakers, enabling them to do a better job reproducing high frequencies. By utilizing this method, you will have a bi-amplified system, gaining improved power and headroom for your system.
Subwoofer outputs
The Velodyne subwoofer is designed to operate using the full-range audio signal for input when using the built-in crossover.

Velodyne CT-I00120 Subwoofer - Figure 1

Some processors/receivers have a “subwoofer out” jack that is internally filtered and designed to be used with a conventional amplifier and speaker. In some rare cases, combining both an external crossover and the one internal to the subwoofer may result in low output and increased noise. In these installations, you may need to bypass the internal crossover in either the processor or Velodyne subwoofer. In some installations, simply setting one crossover to a higher frequency (such as 120 Hz) will restore
maximum performance.
To bypass the subwoofer’s internal crossover when the unit is being fed a low pass signal from another crossover, simply locate the switch marked X-over, OUT – IN on the rear panel of the subwoofer and set to the OUT position. This will eliminate the internal crossover from the signal path.
Note …
If not using an external crossover, you should use the built-in crossover for optimal performance.

Speaker-level connection

Figure 2 shows an easy way to connect your Velodyne subwoofer directly to your receiver or integrated amplifier.
When connected in this fashion, your satellite speakers will be crossed over at 80/1 OOHz (or 85Hz forCT-100), which removes the lower bass from your speakers, enabling them to do a better job reproducing high frequencies.
You may also connect your satellites directly to your receiver or amplifier along with the subwoofer if you wish to bypass the internal high-pass crossover.
Caution!!!
To avoid damage to your main amplifier, be sure to maintain the correct polarity when making all connections. Red (positive) to red, and black (negative) to black. Be sure that all connections are tight, and that there are no loose strands or frayed wires_

Velodyne CT-I00120 Subwoofer - Figure 2

Interconnect cables

When installing your new Velodyne subwoofer using line-level connections, you should always use shielded phono cables. There are many decent cables available today, most of which will work perfectly well. We do recommend that you keep the length of the cable as short as possible to avoid any potential noise problems.
When using speaker-level connections, use a decent-quality speaker cable that mates well with the connectors. Be very careful to avoid any loose strands or frayed wires which may result in a short, which may damage your equipment. Cables of extremely large size are typically not required. Extremely large gauge wire may not properly fit in the binding posts, resulting in a poor connection and possible short circuits.

Placement

True subwoofers operate at extremely low frequencies which are primarily Omnidirectional. While it is recommended that the subwoofer be placed on the same plane as the satellite speakers, room and system conditions often dictate otherwise. Keep in mind that frequency response and output level can be drastically influenced by placement, depending on the acoustic properties of the listening room. Typically, the optimum location for a subwoofer is tucked away in a corner of your listening room. This location will
usually offer the greatest output levels and optimum low-frequency extension. The worst location for a subwoofer it typically far away from any walls, and close to the center of your room. Avoid these locations when possible. When using a pair of Velodyne subwoofers in stereo, it is preferable to place each subwoofer by the satellite of the same channel. Typically, a minimum distance of 1 to 2 feet from your TV to the subwoofer will be adequate to avoid any magnetic interference.
Caution!
This subwoofer has electronics built into the cabinet. Do not place the cabinet next to sources of heat such as furnace registers, radiators, etc. Do not place the unit near sources of excessive moisture such as evaporative coolers, humidifiers, etc. The power cord should be routed in such a way that it will not be walked on, pinched, or compressed in any way that could result in damaging the insulation or wire,

Care of your subwoofer

Do not use any harsh detergents or chemicals to clean the cabinet.
Abrasives, detergents, or cleaning solutions may damage the finish on the cabinet. We recommend using a damp cloth to clean the cabinet.
During normal conditions, the subwoofer may be left on continu ously without any problems. The unit is equipped with a signal sensing tum on/off that will automatically tum on the unit when a signal is present at the inputs and turn off the unit after several minutes when there is no longer any signal at the inputs.
If you plan to leave the unused for an extended period of time, we recommend that you turn off the unit by the master power switch on the rear panel.

Troubleshooting & Service

Before seeking service for your subwoofer, please re-check all systems. Following is a simple troubleshooting guide to assist you.

Verify unit is plugged in and power outlet used is active.
Is the power switch on?
Is auto turn on/off set properly?
Is the unit receiving an input signal from your source?
B. Have all controls on the subwoofer (volume, crossover, phase, etc.) been properly set?
If the unit has been running at high levels, one of the protection circuits may be engaged. Has the built-in amplifier overheated?
If the protection circuitry is active, the unit may cycle on and off until operating parameters return to normal. Under more serious conditions, the unit may shut off completely. Normal operation will return upon cooling, but you may be required to tum the power off and then on again to reset the unit.

The following conditions require service by a qualified technician:

The power cord has become damaged.
The unit does not appear to operate normally or exhibit a marked change in performance.
The unit has been exposed to water.
Some part of the cabinet or circuitry is physically damaged.

Thank you for purchasing a Velodyne!

SPECIFICATIONS	CT-100	CT-120
Cabinet (H,W,D)	17″xl ex17.5′	1815055(18.75′
Frequency Response	28hz-120hz +/- 3 dB	25hz-120hz +/- 3 dB
High Pass Crossover	Passive 85 Hz
(6 dB/octave slope)	80hz or 100hz

Specifications are subject to change without notice.

FOR YOUR RECORDS.. ……………
DATE PURCHASED…………
DEALER…………
SERIAL#…………………..
‘ NOTE : Please complete and return your warranty card within ten (10) days.

if you know subwoofers, you know about Velodyne.”
– Corey Greenberg
Home Theater Technology/February 1995
it delivered room-shaking bass and dramatically demonstrated the effectiveness of a single subwoofer placed to one side of the room.’
– Julian Hirsh
Stereo Review. January 1997
Other Velodyne Subwoofer Products:

F-Series
FSX-12
FSR-10
FSR-12
FSR-15
FSR-18| VA-68X11
VA-8100X
VA-1012X11
VA-1215X11
---|---
VA Series
VA-806
VA-907.2
VA-1210
VA-1512| HGS Series
HGS-10
HGS-12

Velodyne Acoustics, Inc.
1070 Commercial St. Suite #101
San Jose, CA 95112
408.436.7270 voice
408.436.7276 fax
Web Site:http://www.velodyne.com
E-mail:velodyne@earthlink.net
Printed on recycled paper.