ADJUSTING THE SYSTEM
Once the system is operational, the first thing to do, is set all crossover points to approximate settings. In the case of the basic subwoofer system, set the Low Pass filter crossover at 100 Hz or so. Set the Bass Boost equalizer control to 0 dB.
Now you should set the amplifiers LEVEL adjustment. The knob accessible on the front of the amplifier marked Input Level adjusts the input sensitivity from150mV to 9 Volts.
To adjust the input sensitivity, turn the control using a small flat head screwdriver fully counter clock wise to the minimum position. Do not apply any pressure while turning as this might break the control unit. Adjust your radio volume level to maximum marking and until audible distortion occurs. When you begin to hear any distortion in the sound, back down a notch and your amp is set. If no audible distortion occurs, begin to raise the amplifier gain until there is distortion and then turn it down a notch. It is helpful to have a second person to help you set the gain. When setting up a
The level control of any car amplifier should not be mistaken for a volume control. It is a sophisticated device designed to match the output level of your source unit to the input level of the amplifier. Do not adjust the amplifier gain to maximum unless your input level requires it.
If your unit has been professionally installed please do not change the gain settings set by the installer, he is the professional!
You system can also be extremely sensitive to noise when the LEVEL is set to maximum and does not match your input signal. The gain adjustments need to be made only once when first setting up the system.
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