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F
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C OnTrOLS . & . A DJUSTMEnTS
Sequence . o f . A djustments
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.
Active . H ighpass . a nd . L owpass . F iltering
The AXTON models A1350, A260, A2180 and A495 do not only offer
conventional fullrange amplification: You also have the choice of high-
pass 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
30
30
A1350-495 Manual D+E+F.indd 30
All manuals and user guides at all-guides.com
between10 and 16 cm diameter) - which do not give you strong bass
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.
1 .
CrOSSOVEr .FrEQUEnCy . S ETTInGS . .
. . . . . . . . . . . . . . . . . ( FILTEr) . F rEQ . . H IGHPASS . & . L OWPASS
Before you can effect the respective input sensitivity / gain adjustments
(LEVEL) 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). For .best .results .all .crossover .settings .should .usually .be .
played . b y . e ar rather than by guessing a frequency value!
Do . n ot . f orget . t o . s et . t he . a mplification . m ode . s witches . i nto . t he . r e-
quired . p osition, . i .e . . H IGHPASS . o r . L OWPASS! Any frequency setting
on the filtering controls will be inactive if the amplification mode switch
remains in position FULL!
For . a ppropriate . c rossover . f requency . s election, . a ll . t one . c ontrols .
(Bass, .Mid, .Treble, .Sub) .and .all .fader .and .balance .controls .etc . .
on .the .head .unit .have .to .be .brought .to .their .neutral .or .center .
position!
The "Loudness" function should also be deactivated.
07.09.2007 12:23:51 Uhr
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