Hi all this is my first post hope you can help.I am building a power amp which would usually use a transformer supplying 40-0-40v from it. I have several good quality transformers supplying 37-0-37v my question is as I am only 3v down on spec will this just lower the total output from the amplifier circuit. The capacitors on the power supply are 6x 4700μf at 63v as I have not been active in the electronics world since 1976 I am a little rusty to say the least thanks;Dave.