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In Reply to: Amplifier transformer hum: what to do? posted by Feanor on June 24, 2004 at 09:55:00:
If you have tried all the things mentioned by other posters and still have the problem you may want to try an AH! AC Offset Killer which you can get from Upscale Audio ($189). It's designed to remove any DC from the AC line which can cause torrodial transformers to hum. It worked for me. You can read about it at Upscale's website. Be advised that this device, if used with a large, Class A biased amplifier will squash the hell out of dynamics as well as get extremely hot. A small amp may not suffer this. If it doesn't work for you I understand that you can ship it back for a refund. You will also need a power cord as this device doesn't come with one.If your amplifier is large and you are interested, I can tell you how I used two of these wired in parallel to bring the dynamics back to life. I have an audiophile buddy who has a Master's Degree in Electrical Engineering from Duke University who helped me with this. It's too long-winded to explain here so if you want to e-mail me I can give you more details. Be advised that the project is not for a novice or faint of heart but it works. You will have to take the innards out of both units and of course blow any warranties that ever existed.
Best Of Luck
Woodrow
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- Re: Amplifier transformer hum: what to do? - Woodrow 08:28:31 07/02/04 (0)
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