Velodyne Acoustics SPL-800i user manual Troubleshooting and Service, Subwoofer Direct

(such as 100-120 Hz) 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 80 Hz.

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 - 0°/180°

This control allows you to “reverse” the phase of the subwoofer’s output signal 180° to correct for any possible mismatch and 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.

Crossover Switch - INTERNAL X-OVER/

SUBWOOFER DIRECT

This switch allows the internal crossover circuitry to be removed from the signal path. This is required in certain installations which route the signal through external processors with a crossover circuit of their own, such as the new digital units. Simply move the switch to SUBWOOFER DIRECT to disengage the built-in crossover. For all other installations which do not have a separate electronic crossover, we recommend you leave the switch set to INTERNAL X-OVERto provide optimum performance.

Auto Turn on Function

With this function in the “auto” position, your subwoofer can be safely left with the main power switched on continuously. The subwoofer will turn itself on automatically when an audio signal is present. If no signal is present for approximately 10 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.

Power Switch

The master power switch is located on the lower half of the unit. This rocker style switch is the main on/off for the unit. This switch should be set to position 1 (up) for on, and 0 (down) for off. If the unit is to be left unused for an extended period of time, the master power switch should be turned off.

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TROUBLESHOOTING AND SERVICE

If you should experience a problem with the operation of your subwoofer, please check all of the following before seeking service. Following is a simple troubleshooting guide to assist you.

1.Verify that the unit is plugged in, power outlet used is active and supplying proper voltage.

2.Is the power switch on?

3.Is the auto turn on/off set properly?

4.Is the unit receiving an input signal from your source?

5.Have all controls on the subwoofer (volume, crossover, phase, etc.) been properly set?

6.If unit has been running at high levels for an extended period of time, one of the protection circuits may be engaged.

•Is the built-in amplifier extremely hot to the touch?

•Is your power line voltage sagging below acceptable levels?

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 should 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

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