Operation; Lowpass Crossover Frequency Adjustment; Level Control - AXTON AXB20P Einbauanleitung

oPeratIoN

Turn-on your head-unit keeping your volume at the lowest setting. The green status LED on
the front of the amplifier should light up now. If not, turn-off your head-unit and re-check all
wiring to and from the amplifier for missing or faulty connections.
ProteCt = leD ProteCtIoN INDICator
This active subwoofer is equipped with an overload protection, immediately upon overloading
(due to short circuit or much increased temperature) the overload protection is activated, and
the red LED indicator is lit. Through this the amplifier is protected against damage. In case of
the thermal protection a certain short cooling time must be allowed after which the amplifier
automatically resumes operation.

loWPass CrossoVer freQueNCY aDJustmeNt

The lowpass cut-off frequency setting, marked as „LPF" on the active subwoofer, depends
on the bass response of the loudspeaker. As a rule of thumb, settings in a range between
80 to 100 Hz will render best sonic results. For an intermediate lowpass crossover setting to
attempt input gain and phase-shift control adjustments, go for a VR-pot set to approx. 80 Hz
– and after input gain and phase have been adjusted, it is advisable to fine tune the lowpass
crossover frequency for best possible sound quality.
Note: In general, setting the lowpass crossover frequency too low, will result in a weak and
muddy sounding bass, while setting this crossover frequency too high will result in a 'booming'
bass sound and reduced low end extension.

leVel CoNtrol

The input level control allows the system to work well within a wide range of output level.
Choose the adjustment in the way that you achieve a sound most possibly without any distor-
tion. As a guideline the following procedure is recommended: If you use several amplifiers, the
adjustment has to be made for each set separately. Tune the volume control of your car radio
to 2/3 of the maximum volume. Now turn the gain control of the amplifier from „Min„ to „Max„
direction, by playing some music with a significant bass content, until you can hear distortions.
Then again, reduce it somewhat. The gain control adjustment has been finished now.
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