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CONTROLS & ADJUSTMENTS
C609 5-Channel System Amplifier
The AXTON C609 is a powerful 5-channel system amplifier. One single
C609 allows for an easy-to-install, speaker-dedicated amplification
of a complete 5-channel speaker system, i.e. with two stereo pairs of
independently controlled satellite speakers (front and rear) and one
mono subwoofer.
The integrated, separately adjustable HIGHPASS and LOWPASS cross-
over filters of the C609 enable you to drive the connected speakers in
the specific frequency range where they will perform best.
Dashboard, door and rear shelf speakers of 10-16cm diameter will never
have a good low-end bass reproduction anyway. Therefore the C609
front and rear satellite channels will only be playing in the midbass
and mid/high frequency range. This so-called highpass filtered or HPF
amplification mode aIso puts less electrical and mechanical ‚strain‘ on
the speaker units, resulting in an increased power handling capacity. The
subwoofer output will only receive lowpass filtered (LPF) signals resul-
ting in the subwoofer only playing in the low-end bass frequency range
without any unwanted‚ booming‘ into the mid/high frequencies.
1
CROSSOVER FREQUENCY SETTINGS
HIGHPASS FRONT & REAR, LOWPASS SUB
Before you can effect the respective input sensitivity or gain LEVELs
you first have to select the system appropriate crossover frequencies.
For best results all crossover adjustments should usually be effected
by ear.
For appropriate crossover frequency selection, all tone controls (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.
Depending on the actual cone surface area, voice-coil diameter and
the rated power handling of the ‚satellites‘ it is recommended to set the
high-pass crossover / cut-in frequency between 40 and 240 Hz.
If the satellite highpass frequency is set too low, the mid-bass repro-
duction will be increased, but at the same time the power handling
capacity of the satellites will decrease. If the highpass frequency is set
too high, the mid-bass reproduction will become ‚thinner‘ while the
power-handling capacity of the satellites will increase.
As a general guideline, below you find a practice-proven list for appro-
priate satellite HPF crossover / cut-in frequencies covering the most
widely used dashboard, door and rear-shelf speaker diameters:
Front Satellite Speakers HIGHPASS FREQ.
10 cm Ø Coaxials or 2-Way Compos 90-120 Hz
13 cm Ø Coaxials or 2-Way Compos 80-100 Hz
16 cm Ø Coaxials or 2/3-Way Compos 70 - 80 Hz
Rear Satellite Speakers HIGHPASS FREQ.
10 cm Ø Coaxials or 2-Way Compos 100-150 Hz
13 cm Ø Coaxials or 2-Way Compos 120-130 Hz
16 cm Ø Coaxials or 2/3-Way Compos 100-130 Hz
C609 Manual DE.indd 26C609 Manual DE.indd 26 15.02.2005 10:34:06 Uhr15.02.2005 10:34:06 Uhr
26


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