Colin Wonfor’s Clinic: Transformer noise through speakers when switched off!

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Colin Wonfor

Dear Colin, step up transformer noise. I purchased an amp from Europe that needs 240v [ I am on north American voltage].. I bought a step up/step down transformer to equalize the voltage. it works, but the transformer produces noise through the speakers, even when the amp is turned off. the transformer I bought was $60.. do I need one specific for audio applications? Any suggestions? Thanks for any help

You note said noise when OFF makes me think maybe the transformer is to close to the speakers and you might be getting magnetic coupling. It should make no sound OFF. Please check and disconnect the speakers from the amp and come back to me with result.

Thank you for the question.

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