The CA41 is a four channel amplifier. It is mostly
used with a front system connected to channels C/
D and a subwoofer connected to channel A/B. You
will find speaker wiring and filter setting example on
page 10. Please observe the proper settings of the
channel A/B LPF multiplier switch and of the channel
C/D HPF multiplier switch.
The CA41 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 11.
Channel A/B is equipped very much like the CA22
and CA23, 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/D , operate
from 4 kHz upwards using the HPF in multiplier po-
sition x 10 150 Hz – 5 kHz.
7
The CA51 is a five channel amplifier. On channel
A/B, C/D the filter configuration is exactly the same
as for CA41.
Channel E is a subwoofer mono channel with a
lowpass filter adjustable from 60 to 120 Hz. Channel
E has also a subsonic filter that can be switched IN-
OUT. The subsonic filter has a fixed frequency of
25 Hz. The CA51 has also a phase control variable
from 0 - 180 degrees.
CA22, 23, 31, 41 & 51
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
The CA31 is a three channel amplifier. It has a
variable high pass filter, 50-150 Hz, for channel A/
B. The C channel is for subwoofers and has a
subsonic filter, a variable low pass filter, 50-120 Hz,
and a phase control variable from 0 - 180 degrees.
The subsonic filter can be switched IN-OUT and has
a fixed frequency of 25 Hz.
Crossovers of CA31, CA41 & CA51
CA-51
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