Operation Manual

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reproduction anyway - will only be playing in the midbass and mid/
high frequency range. This so-called highpass filtered or HPF amplifi-
cation mode also puts less electrical and mechanical 'strain' on your
coaxials and component speaker systems, resulting in an increased
power-handling capacity.
In LOWPASS mode the respective speaker output will only receive
low-pass filtered (LPF) signals resulting in the subwoofer only playing
in the low-end bass frequency range without any unwanted 'smearing'
into the mid/high frequencies.

 

Before you can effect the respective input sensitivity / level adjustments
(GAIN) you first have to select the system appropriate crossover fre-
quencies for all speakers connected by way of the respective filtering
controls marked HIGHPASS and LOWPASS (depending on amplifier
model). 
 rather than by guessing a frequency value!

 Any frequency setting
on the filtering controls will be inactive if the amplification mode switch
remains in position FULL!




The "Loudness" function should also be deactivated.



Depending on amplifier type (mono, 2-channel, 4-channel or a com-
bination thereof), amplification mode (fullrange, highpass or lowpass)
and connecting mode (stereo or mono bridged) it is possible, that only
part of the adjustments described in this manual section are applicable
to your individual car audio system.
If you are using your amplifier in conventional fullrange mode (eg. with a
soundboard), you may skip paragraph "1. Crossover Frequency Settings"
and go directly to "2. Sensitivity Adjustments".
In case you are using your new amplifier(s) in a multi-channel amplifier
system with highpass-filtered front and/or rear satellites and/or a
lowpass-filtered subwoofer, we recommend you to read the complete
section "Controls & Adjustments" before you start adjusting any of the
frequency or level controls.
However, it is recommended to keep to the practical and logical se-
quence of the frequency and level adjustments as described in this
manual section.

The AXTON models A1500, A2150 and A485 do not only offer conven-
tional fullrange amplification: You also have the choice of highpass or
lowpass amplification mode, enabling you to drive your car audio speakers
in the specific frequency range where they will perform best.
In HIGHPASS mode, the dashboard, door and rear shelf speakers (usually
between10 and 16 cm diameter) - which do not give you strong bass