CX-A4
I
NSTALLATION AND OPERATION MANUAL
7
13 Bose
Equalisation Modules
Each channel on the CX-A4 can have Bose
equalisation so
that its output will be compensated correctly for a wide range
of Bose
speakers. The Bose
equalisation module for the
CX-A4 is a two channel device the CX-A4 requires three
modules to be installed to allow compensation on every
channel of the amplifier.
The Bose
equalisation module is available in two
configurations:
Model 8
– Suitable for Bose
Model 8 Speakers
Model 32
– Suitable for the Bose
Model 25, 32 and 102
speakers
Notes:
•
A Bose
equalisation module cannot be installed to channels with a VCA module
installed.
•
A Bose
equalisation module consisting of a model 8 channel and a Model 32 channel
can be manufactured upon request. Contact our technical department for more details.
14
Installing Optional Modules
There are three optional modules for the CX-A4; the VCA-2, VCAL-1 & the Bose
equalisation module. Components supplied with the various modules are listed below:
VCA-2:
Two 40mm M3 hex spacers, one plastic insert & two 3-pin screw terminal plugs.
VCAL-1:
Two 40mm M3 hex spacers & two 3-pin screw terminal plugs.
Bose
EQ:
Two 25mm M3 hex spacers.
The CX-A4 connectors to install the VCA modules are to the rear of the amplifier on the
input PCB clearly marked on the PCB as ‘CON X TO VCA MODULE’ where ‘X’ is 1 or 2
see below: -
CON
1
= Channel 1&2
CON 2
= Channel 3&4
When installing modules, follow the instructions below carefully. Incorrect installation can
cause damage.
1. Turn the power off and remove mains cable.
2. Remove the top panel.
3. Select the CX-A4 connector you wish to install the module to (see notes above) and
remove the jumpers from it.
4. When installing a VCAL-1 or VCA-2, remove the relevant rear panel blanking plate.
5. When installing a VCA-2, push the plastic plug into the rear panel ‘clip protect’ hole.
6. Two M3 fixing screws can be found adjacent to the CX-A4 connector. Remove and
retain these two screws then fix the M3 hex spacers in their place.
7. When installing a Bose
equalisation module, configure the relevant 65Hz filter to ‘IN’
and connect a CXL-100 100V line transformer (see section 6)
8. Push the 10-way plug onto the CX-A4 connector with the plug aligned so the cable
approaches it from the rear of the chassis and check that the connector mates with all
10 pins (important orientation diagrams can be seen on the following page).
9. When installing a VCAL-1 or VCA-2,
position the 3-pin sockets and switch(es) of the
VCA through the cut-outs in the rear panel.
10. Align the two holes in the module over the top of the two spacers.
11. Secure the module with the two M3x6 screws (removed earlier).
12. Fit the top panel.
15-07-02 V9
