s/500 dual to mono

[joegio]

Hi All

I am new to DIY and this is my first post.
I recently built a set of ALPHA-LS speakers (last set available from CSS).
Now I'm off to amplifer selection.
I was woundering if and how a Threshold s/500 could be converted to a mono or bridged configuration.

Thanks
Joe

[Nelson Pass]

Originally posted by joegio
I was wondering if and how a Threshold s/500 could be converted to a mono or bridged configuration.

If your load is very low impedance, you would consider simply
paralleling the inputs and outputs of the two channels after checking
for similar gain and offset between them.

If you want to bridge, you can either generate balanced signals (the
same signal but with + and - polarity) and feed them into the Left
and Right inputs, placing the speaker across the two (+) outputs
of the amplifier.

If you want to bridge internally, you can do so by feeding the output
of one channel back to the (-) input of the other channel through a
resistor equal in value to the high value feedback resistors used in
the loops of those two channels.

Which of those approaches is attractive to you?

[joegio]

Thank for the detailed options.

I believe the second approach looks to be the simplest and can be accomplished using a preamp with balanced outputs.

[joegio]

It took only a few hours to build an XRL to dual RCA splitter box and I am absolutely stunned by loud a clear my speakers could play.