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Setting up the multi channel power amplifier
8
Outputs
The following table gives details of the output connections:
Use this output To connect to this
CHANNEL 1 to Loudspeakers of 4Ω to 15Ω, using
CHANNEL 5 either plug or bare wire connections.
The recommended assignment of channels, to make best use of
the capacity of each power supply, is as follows:
Channel Assignment
CHANNEL 1 Main left
CHANNEL 2 Main right
CHANNEL 3 Centre
CHANNEL 4 Rear left
CHANNEL 5 Rear right
Alternatively, channels 1/2 and 4/5 can be used in bridged
output mode; see To wire to A500 Loudspeakers in bridged
mode, page 12.
Each channel of the 558 Multi Channel Power Amplifier provides
twin outputs for bi-wiring. On speakers that provide separate
connections to the bass/mid and tweeter units this allows the
units to be connected independently to the multi channel power
amplifier, for optimum sound quality.
Alternatively, for loudspeakers providing a single pair of inputs,
either of the output terminals can be used.
Inputs
The following two alternative audio inputs are provided for each
channel:
Use this input To connect to this
UNBALANCED A preamplifier, using phono connectors
and high-quality screened cable.
BALANCED A balanced analogue output, using
XLR connectors:
1 (Green) = GND
2 (Red) = +ve
3 (Black) = -ve
Select the appropriate input using the INPUT SELECTOR for
each channel.