2. amps-preamps
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What is causing the hum?

I hooked up my MC-12 to my Sherbourn amps for the first time last night. I noticed a very annoying hum and also, it seemed like I was not getting all of the power I needed to my Thiel Powerpoints. With the volume all the way up, the powerpoints were not overly loud. I would expect them to be, as the Sherbourns are 200watt amps at 8 ohms. Heck, my Yamaha receiver made the Thiels extremely loud at 50% on the volume control.

What gives? How do I get rid of this hum?
mm2862

Showing 1 response by racerx90

racerx90
26 posts
 
Also make sure you're not using Halogen lights on the same circuit.

My Rotel RB-1090 hummed so loud I thought it was going to take off. I ended up tracing the problem not to a ground loop, but by a Halogen light I was using in the room.

I could turn the light off and the hum would stop (dead quiet.) Then if I turned it back on, the hum was back. I ended up moving the light to a new circuit which cleared up the hum.

Good luck.
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