Coda C475 Guia do Utilizador descarregar pdf (Página 8)

8 C745 User Guide Version 1.0

Note: 1. Negative (-ve) output terminals must not be joined together, since they are not both at 0V.

2. Because the currents involved are very high, the speaker cables should conform to the

following minimum requirements, otherwise the losses will cause the cables to get hot and

audio power will be reduced:

C475 - 14 A into 4 Ohm speaker loads.

3. Do not connect the inputs/outputs to any other voltage source such as a battery, mains

source or power supply, regardless of whether the amplifier is turned on or off.

4. Do not run the output of any amplifier channel back into another channel’s input and do

not parallel or series-connect an amplifier output with any other amplifier output.

Operation

Switching on

At ‘switch-on’ the protection circuit will initially activate whilst the circuits stabilise. Assuming no faults

are detected after a few seconds, the red A/P LED will go off.

Panel controls and indicators

Level controls

These are analogue controls allowing precise level settings. Note that in ‘BRIDGED’ mode, both level

controls must be set to the same position.

Limiters

Each channel incorporates a high performance limiting circuit that prevents the outputs from

‘clipping’ when the maximum level is exceeded. They have been designed to be transparent to

signals below this level and the attack and release times have been optimised for them to be

unobtrusive when in operation.

Level Indicators

Each channel has an LED level ‘bar’, which shows green up to the -3 dB point, then orange and

finally a red limit LED. Note the limit LED has a different response time to the others and with fast

transients, can be ‘on’ even though some of the lower level LEDs are not.

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Coda C475 Guia do Utilizador Página 8