Velodyne Acoustics CHT- 8Q, CHT-10Q, CHT-12Q, CHT-15Q User Manual

CHT- 8Q CHT-10Q CHT-12Q CHT-15Q

eries

USER’S

MANUAL

Remote Controlled Home Theater Subwoofers

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CHT-Q Series User’s Manual

Table of Contents

ongratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Crossovers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Interconnect Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Restoring Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Care of Your Subwoofer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Protection Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Troubleshooting and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Velodyne Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

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CHT-Q Series User’s Manual

Congratulations!

ongratulations on your purchase of a Velodyne CHT-Q subwoofer. 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.

Note: Do not leave unit in direct sunlight or use in high humidity environments!!!

Warning!

To prevent fire or shock hazard, do not expose this product 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. Use caution when lifting or moving to avoid injury. Please save the carton and all packaging materials for future use. Record the serial number in the space provided on page 19 for future reference.

Product Features

• DSP-controlled

• Front mounted 8-segment LED display

• One-touch, 5-band graphic equalizer with microphone included

• 4 selectable pr

• Night-mode setting

• Mute control

• Built-in 180 watt (RMS) power amplifier (CHT-8Q)

• Built-in 195 watt (RMS) power amplifier (CHT10Q)

• Built-in 225 watt (RMS) power amplifier (CHT-12Q)

• Built-in 750 watt (RMS) power amplifier (CHT-15Q)

• Adjustable (40 to 120 Hz) low-pass crossover with Subwoofer Direct setting

• Speaker-level inputs

• Line-level inputs

• Signal sensing auto tur

• Variable volume control with digital LED readout

• Selectable phase contr

• Dual staggered low-pass crossover; 12 dB/octave initial, 24 dB/octave ultimate

• Anti-clipping circuit

• Over excursion protection

• Slot loaded bass reflex design

esets for customized listening mode

n on/of

ol (0, 90, 180, or 270 degrees)

f with bypass option

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CHT-Q Series User’s Manual

Prepare for Installation

Your new Velodyne subwoofer provides for a number of installation options. Read all of the i

nstallation information below in order to determine which installation option is best for your

system.

to prevent possible damage.

Remember to perform all installation procedures with system power turned off

Placement

The first step in installing your new CHT-Q sub is to determine where it will be placed in the room. Unpack the system carefully and use the following guidelines in order to find the best room placement option.

True subwoofers operate at extremely low frequencies which are primarily omni-directional. Keep in mind that frequency response and output level can be drastically influenced by placement, depending on the acoustic properties of the listening room. To obtain optimum output from your subwoofer, try placing it within a foot of a corner. This location will offer the greatest output levels and optimum low frequency extension. If at all possible, your subwoofer should be placed along a wall. The worst location for a subwoofer is 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 feed each subwoofer with one channel and place each subwoofer near the satellite of the same channel.

Depending on the size and type of fur possible. Finding the best location within your environment will likely require some experimentation. W best to you when seated in your typical listening position.

Regardless of where you install your Velodyne subwoofer, it must remain in an upright position (woofer facing forward). Using, shipping or storing the subwoofer in any other position for an extended period of time may result in damage to the unit not covered by warranty.

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 moistur routed in such a way that it will not be walked on, pinched or compressed in any way that could

esult in damage to the insulation or wir

Your Velodyne CHT-Q subwoofer is NOT magnetically shielded. Should you find it necessary to use it with an older CRT monitor or TV, keep it at least two feet from the monitor. Experiment

ect distance by minimizing distor

for cor

e suggest you experiment with the location during setup to find what sounds

e such as evaporative coolers, humidifiers, etc. The power cord should be

nishings in the r

tion of the pictur

oom, perfect placement may not be

e and colors.

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CHT-Q Series User’s Manual

Installation

Inputs

Your new subwoofer is equipped with speaker-level and line-level inputs. Use the LINE LEVEL jacks when connecting your subwoofer to a pre-amp, signal processor (such as LFE out), linelevel crossover, or receiver with pre-amp level outputs. When using the line level jacks, some receivers may not provide enough signal to have the unit’s auto-on feature operate properly. Additionally, this lack of signal may also cause the subwoofer to produce less output than it is capable of.

To alleviate this condition, we recommend the following steps:

1) If using line level jacks, BOTH THE LEFT AND RIGHT INPUT SHOULD ALWAYS BE USED – never use just the left or just the right input. If using line level connections from a preamp or signal processor, use both Left and Right inputs from your preprocessor or preamp and connect them to the Left and Right inputs on your subwoofer. (See figure 4 on page 10.)

2) If using a r subwoofer. The subwoofer’ volume). Adjust the LFE channel on your receiver or processor to achieve the desired bass output. See your receiver or processor’s owner’s manual for more information. (See figure 5 on page 11.)

eceiver with LFE out, be sur

s default volume setting is 30 on a 1-80 scale (roughly 1/3

e the LFE channel is sending adequate signal to the

Volume Control

This control allows you to balance the output from the subwoofer to the main speakers in your system. This contr and subwoofer when listening to music. The default volume setting is 30 on a

ning:

War

Some manufactur It is very important to verify that your receiver Sub-Out channel is set to the same output level as your front right and left channels. Refer to your receiver manual for the individual channel level adjustment procedure. If your receiver Sub-Out channel is set too low, the subwoofer may appear to have a weak output, it may sound noisy or distor may not operate properly.

ol should be set to achieve similar output levels fr

ers preset their receivers with the Sub-Out channel signal at a minimum level.

ted, and the Auto On/Of

om both the main speakers

1-80 scale.

f featur

Low-pass Crossover - 40 to 120 Hz

All inputs sum the left and right channels together, with the resulting signal passing through an adjustable low-pass crossover before being amplified. The crossover control allows you to adjust the upper limit of the subwoofer’s frequency response from 40 to 120 Hz. The subwoofer’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 ar output, you may wish to choose a higher frequency (such as 100 - 120 Hz) than you would with

ger speakers which have gr

lar 80 Hz. With larger speakers, you may want to set this even lower, for example 70 Hz.

eater low frequency output. The default crossover setting is

e smaller with limited low fr

equency

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CHT-Q Series User’s Manual

Phase Adjustment - 0°/90°/180°/270°

This control allows you to change the phase of the subwoofer’s output signal to correct for any p

ossible mismatch and resulting cancellation between the subwoofer and your main speakers/amplifier. To adjust, simply listen to the system with music playing, then depress the various phase switches on the remote control and listen for a change in mid-bass frequency output. The correct position will have a greater amount of apparent mid-bass frequency output. If the settings sound similar, we recommend the “0” position. See the remote control section for more information.

Auto Turn on Function

The subwoofer will turn itself on automatically when an audio signal is present. If no signal is present for approximately eight minutes, the unit will switch to standby mode (blank LED). While in standby mode, your subwoofer will draw very minimal power. Your sub is shipped in the “Always On” position. In order to activate the circuit, change the switch to “Stand-by”.

Warning:

If the Sub-Out channel signal level from your receiver is too weak, this feature will not operate properly and shut the subwoofer off while you are listening to it. To correct this, see the VOLUME CONTROL section on previous page.

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CHT-Q Series User’s Manual

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