Ok. I have two solid state mono amps that someone gave me. New/unused. In my small shop here at home I also have a transformer from a PS Audio 100c. It appears to be a 110vac / 40-0-40 / +/-58vdc setup. HOWEVER, I want to know can I replace the bridge rect and the caps and reduce my dc voltage to use on my new mono boards? They call for a maximum of +/-45vdc @ 2.5 amp. Bottom line ........ can I use this transformer to supply these boards? The transformer has dual outputs for 2x mono amps.
As such you can. The +/-60Vdc have to be converted to around 40Vdc-42Vdc. That is a lot for a linear regulator with that current. You will most likely need a Buck converter. The best would be a Buck converter (down to around 45Vdc) followed by a linear post-regulator (taking the remaining drop).
However, it may not be cheaper than buying a new transformer.
Alternatively you need a pre-transformer to reduce the primary voltage. It is less expensive than buying a new transformer.
NB: Is your net voltage (wall plugs) 110/115V or 230/240V?
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You can, technically, but it´s more complex/expensive than either getting a couple modules which stand higher voltage or a lower voltage rated transformer.
Not sure about your "junk box" contents but you may pull and use a transformer from any dead/abandoned/junked amplifier, say 60 to 120W per channel , which will have , say, +/- 36 to 42V rails.
Free or for a couple bucks, maybe $20 if a garage sale or Salvation Army special.
Or visit your friendly local Tech and ask for abandoned non repaired stuff.
Lots of people reject estimates, abandon stuff and buy new instead, .... don´t ask me how I know
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