PowerBass ACA-250.1, Руководство пользователя

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This control allows you to match the input level of the amplifier to the output level of your head unit. Matching
the input can be accomplished in four simple steps:
1. Make sure that the remote gain control is not plugged in until after the master gain control is set.
2. Set the GAIN control on the amplifier to Min (completely counter clock wise).
3. Turn on the head unit and adjust volume to 2/3 maximum, and set the BASS and TREBLE to zero.
4. Adjust the LEVEL control clockwise until the sound just begins to distort, then back off slightly to cut
distortion and operate at optimum gain.
Remember, the GAIN control is not a volume control. Ignoring these four steps above may leave you with
damaged speaker and/or a damaged amplifier.
LPF (Low Pass Filter) Adjustment
The crossover frequency adjustment filters out frequencies that you don’t want your subwoofer(s) to repro-
duce. Using the LPF control, adjust the Low Pass Frequency to limit the amount of mid range you want going
to your subwoofer(s). Since musical tastes vary, adjust the crossover by ear while listening to the music of your
choice. Be sure to set the tone controls of your source unit to flat before adjusting the crossover.
NOTE: Because this amplifier is only designed for subwoofer applications, the low-pass filter is active at all
times. The crossover point is adjustable to allow more precise system tuning.
Sub Sonic Adjustment
The subsonic filter is a 12 dB/octave high-pass filter, with a fully variable cutoff frequency between 15 - 50 Hz.
When set at frequencies lower than 33 Hz, it conserves amplifier power without audibly affecting the quality
of the sub-bass output.
SET UP ADJUSTMENTS
Input Gain Adjustment
Fig.5 Gain Control
Fig.7 Low Pass Control
Fig.6 Sub Sonic Adjustment
15Hz
30Hz 250Hz
33Hz