Coda Audio C25 - Manual (Page 7)

C25 User Guide Version 1.0 7
Connections
Inputs
The inputs are made via 3-pin XLR connectors, which are electronically balanced and should be
connected via a high grade twin core screened cable, as follows:
PIN1 - Screen (see note)
PIN2 - Hot (signal +)
PIN3 - Cold (signal -)
For Unbalanced Inputs
The amplifier is designed to operate with fully balanced equipment and ground loops or loss of
performance may be experienced if connected to unbalanced sources. If it is unavoidable however,
the following wiring should be used. The cable should still be twin core plus screen.
PIN1 -
Screen - connected to the chassis of the unbalanced equipment - or left disconnected at the
unbalanced end.
PIN2 - Signal Hot
PIN3 - Signal Cold
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 input should be made to channel A only and the rear panel switch set for
bridged mode.
Outputs
The speaker outputs are via Neutrik™ Speakon connectors. Only 2 of the 4 poles are used. 2-pole
(NL2FC) or 4-pole (NL4FC) connectors can be used.
Terminations are as follows :- Pin +1 = +ve
Pin -1 = -ve
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:
C25 - 16A all into 4 Ohm speaker loads
Note: 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.
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.