User Guide

Circuit Control Cards
Removal of a Circuit Control Card
1. Unlock the catches left and right on the base of the card
(Fig. 8).
Fig. 12
8
The operating range of the amplifier is determined by repla-
ceable Circuit Control Cards (CCC). If no special require-
ments regarding the CCC’s are specified when ordering, the
amplifier is supplied as standard with CCC 1.
CCC 1 is plugged in at socket position 3 which means that
the amlifier and its outputs are operating in the full range
(see list on page 9). If CCC 1 is inserted at socket position
2, as described in Fig. 9 to 12, the amplifier operates with a
subsonic filter having a rate of change of 30 dB/Oct. from
26 Hz, compared withe 18 dB/Oct. from 26 Hz in the case
of position 1.
The various Circuit Control Cards available are indicated in
the list on page 9.
Example: If you wish to use the module as a subwoofer
amplifier, with the subwoofer being operated at 90 Hz, you
find the corresponding Circuit Control Card from the list (in
this case CCC 5) and insert the card in your BRAX amplifier
at position 2 of that channel which is to control the subwoo-
fer - the left channel in the case of the mono mode (bridge
mode). Now the amplifier will only process frequencies up to
90 Hz, with any frequencies above that value being suppres-
sed at the rate of change of 18 dB/Oct. The remainder of the
signal (residual aggregate dignal above 90 Hz) is now applied
to the output of the amplifier. These residual signal can, for
example, be supplied to another amplifier (linear feed) in pro-
per phase relation for the mid range. At positions 1 and 2, the
residual aggregate signal of the amplifier module is always
applied to the amplifier outputs.
Example:
Low pass amplifier = Amplifier module output at high-pass.
Full range amplifier = Amplifier module output at full range.
At positions 3 and 4, the amplifier and also its outputs opera-
te in the full range mode.
Handling the Circuit Control Cards
Inserting the Circuit Control Card
1. Choose the position number from the CCC list which
corresponds to the required function of the amplifier, and
insert the card in the base so that the position number on
the card is located at the top at the housing cover next to
the arrows (see Figs. 11 and 12).
2. Insert the card at an angle of approx. 15°
so that it fits properly into the socket.
Press the card between the clips so that
it is secure in the base (Fig. 10).
2. Tilt the card approx. 15° in order
to detach it from the base.
Fig. 8
Fig. 9
Fig. 11
Fig. 10