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C475 User Guide Version 1.0 7

Note: This amplifier is wired to the latest industry recommendations. PIN1 is connected directly to

the chassis/mains earth. If ground loops (mains hum) are encountered remove the screen connection

from the other end of the cable and leave it open circuit. If problems persist, consult your

dealer/supplier.

Do not tamper with or alter any ground (earth) connections inside the amplifier.

For bridged operation use channels A & B (or C & D). Inputs should be connected to channel A (or

C). Pressing the A/B link switch (or C/D link switch) on the rear panel connects B amplifier to the A

input (or the D amplifier to the C input).

Input Link Switches

The three input link switches on the rear panel link the inputs of the channels to the one higher up the

hierarchy ladder. So the following combinations can be achieved.

A & B (input on A) B & C (input on B) C & D (input on C)

A & B & C (input on A) B & C & D (input on B)

A & B & C & D (input on A)

This switching, together with internal crossover cards (optional extras) provides a wide variety of input

connection options.

Outputs

The speaker outputs are via Neutrik™ Speakon connectors: 2-pole (NL2FC) or 4-pole (NL4FC)

connectors can be used.

Terminations (all connectors) are as follows: Pin +1 = +ve signal output

Pin -1 = -ve signal output

For ease of installing bi-amped or bridged speakers, output connector A also carries output B and

output connector C also carries output D. The terminations are as follows:

Output connector A Pin +1 = +ve channel A Pin -1 = -ve channel A

Pin +2 = +ve channel B Pin -2 = -ve channel B

Output connector C Pin +1 = +ve channel C Pin -1 = -ve channel C

Pin +2 = +ve channel D Pin -2 = -ve channel D

For bi-amped operation connect as above.

For bridged operation connect as follows:

Channels A & B +ve = channel B +ve (pin +1 on connector B or +2 on connector A)

-ve = channel A –ve (pin -1 on connector A)

Channels C & D +ve = channel D +ve (pin +1 on connector D or +2 on connector C)

-ve = channel C –ve (pin -1 on connector C)

Note: Both level controls must be set to the same position.

When operating in bridged mode, the minimum impedances are 8 Ohm.

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