Alpine SWD-2000 Mode D'emploi page 10

4. ADJUSTMENT
1. Set the gain to MIN, Bass EQ to 0dB, LPF to 75Hz before switching on the system.
2. Set the Bass/Treble adjustment to zero on the head unit. Set the volume to your average
listening level. It may help to use a music source that is familiar.
3. Next, gradually increase the gain level. Increase the level to the point where the sound of
your system, as a whole, is balanced. If the gain level is set too high, the subwoofer may
begin to distort. Distortion may also occur if the volume is set too high on the head unit.
Check that the other speakers have not begun to distort, before proceeding with the
adjustment. If the entire speaker system in the car is distorting, reduce the volume of the
head unit.
4. Once the gain has been set, adjust the L.P.F (Low Pass Filter) at a frequency which
compliments your speaker system. (We recommend using 75Hz as a starting point.)
5. Adjusting the L.P.F will change the output volume of the subwoofer. Repeat procedures 3
and 4 until the ideal setting is found.
6. Adjust the Bass EQ. It is possible to boost the low frequency output of the amplifier from
0dB (flat) to +12dB. Adjust the Bass EQ (centred at 50 Hz) to suit your personal taste.
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