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Setting up the Stereo Power Amplifier
13
● Fit the phono shorting plugs supplied with the Stereo Power
Amplifier to the unused phono input or inputs.
You can bi-wire in bridge mode by using the other pair of red
terminals to connect separately to the loudspeaker treble unit.
To bi-amp to two A500 Loudspeakers
557 Stereo Power Amplifier
A500 LoudspeakerA500 Loudspeaker
557 Stereo Power Amplifier
Extremely high sound quality can be achieved using two
separate 557 Power Amplifiers, one to drive each loudspeaker.
The two channels in each amplifier are used to drive the LF and
HF units in each loudspeaker.
● Switch the BRIDGE MODE on both amplifiers to the OFF
position.
● Connect the left audio output from the preamplifier to both
inputs on one amplifier.
● Connect the right audio output from the preamplifier to both
inputs on the other amplifier.
● If necessary, remove the links bridging the LF and HF
terminals on the back of each loudspeaker.
● Connect the red and black terminals from the LF and HF units
on one loudspeaker to the red and black terminals on each
channel of one amplifier.
● Likewise, connect the LF and HF units from the other
loudspeaker to the other amplifier.