Using autotransformers


It has been suggested to me that the best way to avoid incoming voltage irregularities from the street to my Krell mono blocks is to add an autotransformer to each amp's dedicated 20 amp line.

It was also not recommended that I use ordinary voltage regulators because they reduce sound quality.

Have any of you had experience with autotransformers in your system? If so I would like to hear your feedback on this.
puerto

Showing 1 response by almarg

Perhaps Puerto is referring to something like this, which is essentially a motor-driven variac/variable autoformer/variable autotransformer, with a control circuit that causes the output voltage to be automatically readjusted whenever it deviates from some nominal value by more than a small amount.

I have used one in the past for non-audio purposes. During times when the motor runs, it makes way too much noise for it to be positioned within earshot of the listening room.

I have no idea what its effects on the sonic performance of an amplifier would be, if any. But I would imagine that whatever effects it might have would vary depending on the design of the specific amplifier.

Regards,
-- Al