Velodyne Acoustics VA-907.2 - Manual (Page 3)

Congratulations!
Congratulations on your purchase of a Velodyne VA-907.2 sub-
woofer system. This system represents the state of the art in
accurate low frequency reproduction. Read and follow the instruc-
tions below to insure safe and proper system operation.
Warning!
To prevent fire or shock hazard, do not expose this equipment to
rain or moisture. To avoid electrical shock, do not open 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.
2
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9
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continued. . .
continuously without any problems. The unit is equipped with a
signal sensing turn on/off that will automatically turn 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 VA-907.2 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 VA-907.2 subwoofer, please re-
check all systems. Following is a simple troubleshooting guide to
assist you.
1. Verify unit is plugged in and power outlet used is active.
2. Is power switch on?
3. Is auto turn on/off set properly?
4. Is unit receiving an input signal from your source?
5. Have all controls on subwoofer (volume, crossover, phase,
etc.) been properly set?
6. If unit has been running at high levels, one of the protection
circuits may be engaged.
Has the built-in amplifier overheated?
Has the speaker's voice coil started to heat up?
If the protection circuitry is active, the unit may cycle on and off until
operating parameters return to normal. Under more serious condi-
tions, the unit may shut off completely. Normal operation will return
upon cooling, but you may be required to turn the power off and then
on again to reset the unit.
The following conditions require service by a qualified technician:
1. The power cord has become damaged.
2. The unit does not appear to operate normally or exhibits a
marked change in performance.
3. The unit has been exposed to water.
4. Some part of the cabinet or circuitry is physically damaged.
Thank you for purchasing a Velodyne!
Product Features & Controls
● Built-in 100 watt (RMS) power amplifier
● Subwoofer Direct - switchable crossover bypass
● Adjustable (40 to 120 Hz) low-pass crossover
● Passive (85 Hz fixed) high-pass crossover
● 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)
● Anti-clipping circuitry
● Magnetically shielded for video use
● Dual staggered low-pass crossover; 12dB/octave initial,
24dB/octave ultimate
● Gain compression circuit to protect woofer from over excursion
● Input overload protection