Crossovers of CA40
The CA40 is a four channel amplifier. It is mostly
used with a front system connected to channels
C and D and a subwoofer connected to channel
A + B. You will find speaker wiring and filter set-
ting example on page 9. Please observe the pro-
per settings of the channel A & B LPF multiplier
switch and of the channel C & D HPF multiplier
switch.
The CA40 can also be used to feed a 2–way front
system with active crossovers between midbasses
and tweeters. This is described in a speaker wiring
and filter setting example on page 10.
Channel A and B is equipped very much like the
CA20 and CA21, however the LPF has a multiplier.
Thus the frequency range of the LPF can be varied
from 50 Hz – 500 Hz in the x1 position or 500 Hz –
5 kHz in the x10 position. This way we can use this
amplifier to feed a 2-way system, where the
midbasses are feed from 80 Hz – 4 kHz.
The tweeters connected to channel C and D ,
operate from 4 kHz upwards using the HPF in
multiplier position x 10 150 Hz – 5 kHz. The Lowpass
filter is switched off.
Multiply
x1 x10
80/800Hz
Off On
200/2(k)Hz
50/500Hz
500/5(k)Hz
LPF
HPF
50/500Hz 220/2(k)Hz
15/150Hz 500/5(k)Hz
Off On
Multiply
x1 x10
7
Crossovers of CA50
The CA50 is a five channel amplifier. On channel A, B,
C &D the filter confoguration is exactly the same as
for CA40.
Channel E is a subwoofer mono channel with a lowpass
filter adjustable from 50 to 500 Hz. Channel E has
also a subsonic filter that can be switched IN-OUT.
The subsonic filter has a fixed frequency of 25 Hz.
CA20, 21, 40 & 50
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