Question about Audio Players & Recorders
I have a low hum with my Carver M 400 amp. How do I fix it?
Posted by Anonymous on
If the hum disappears when you unplug the input audio cables, you need to use BALANCED lines to the amp. Read up on balanced lines and XLR connectors and TRS connectors. Find the subjects of those on google.
Posted on May 16, 2010
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Posted on Jan 02, 2017
If it is accros both channels (on every imput) your best bet is to replace the large electrolytic capacitors in the power supply, these filter out the 50/60 Hz hum from the mains, so they might have failed. Electrolytic capacitors anywhere are good at causing hum!
If they are say 4700UF at 50Volts, you can replace them with any UF rating higher than that, and the same with the voltage. Never go lower than the ratings marked. Also keep an eye out for the temperature rating. It will be given marked "c". If it says 105C then replace with one the same, though it will work with a lower rating it will fail faster than normal. The only problem with electrolytic capacitors is 'space' to fit as they come in many different sizes. So bare that in mind when you a tracking down replacements.
Posted on Mar 22, 2010
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