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CX-A450:

Installation and Operation Manual

07-03-05 V3.0

7 100V Line operation

An optional four-channel, internally

mounted 40W, 70V/100V-line

transformer module (CXL-4160) is

available for the CX-A450. The

installer can select 70 or 100V

operation when installing the

CXL-4160 by means of soldered

links on the underside of the PCB. A

single channel externally wired 40W

70V/100V-line transformer module;

the CXL-40T, is also available. 70 or 100V operation from the CXL-40T is selected by

wiring the speaker network to the correct screw terminal (See Fig 4).

When a 70/100V line transformer is installed to a zone, the 65Hz high pass filter for that

zone must be switched on, the instructions below detail the procedure you must follow to

activate the appropriate filter

1) Turn the power off & remove the mains lead.

2) Remove the top panel from the unit.

3) Turn the relevant 65Hz high pass filter ‘on’ by moving the relevant jumpers to the ‘ON’

position (see list below).

J1 = Channel 1 Location of 65Hz Filter Jumper for Channel 2

J2 = Channel 2

(The other 65Hz jumpers are placed similarly around the PCB)

= Channel 3

J4 = Channel 4

4) Replace the top panel.

If a filter is not switched on, operation

at high input levels and low

frequencies may result in the

transformer saturating and the

amplifier’s VI and clip limiting

operating.

A 2U 19" rack panel (CXL-800) is

available which can accommodate up to 8 CXL-40T transformer modules

8 Bridged Mode Operation

The unit can be operated in Bridged Mode using any two channels (see Fig 6). The two

amplifiers that are to be bridged must have the same signal input fed to each of them and be

out of phase with each other. The input level controls of the two channels should both to be

set to the fully clockwise position.

Wiring Channels 3 and 4 in Bridged Mode

Fig 6

Black

Blue

SPEAKEROUTPUTS

MINIMUMLOAD4OHMS

OUTPUTRATING50W/4OHMS

CH1

CH2

CH3

CH4

CXL-40T

100V

Fig 4

CXL

40T Wired to Channel 4

Fig 5

1 2 3 4 5 6 7 8 9 10 11

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