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Rotel 5 channel amp causes hum through speakers

I have a recently purchased Rotel 200 wpc home theater amp which is plugged into a dedicated circuit through a monster- power line conditioner. There is a low hum through all speakers, which are Thiel 2.2 mains & thiel scs center & rears. The center is mounted right above my samsung dlp tv. All plugs are grounded, and have line conditioners. Help?
michaeljbrown
electric_monk
38 posts
 
Make sure it isn't happening with you TV on only. I find the same thing with my Parasound amp. TV on, hum, TV off, no hum. Some after market PC's such as PS Audio's nicer ones have a removable ground pin. Also, Ernie M (Subaruguru) sells a PC that has a disconnect on the ground. You can then use a good quality PC rather than put a cheater in the mix. I suggest the cheater as a cheap way to check if this is a potential fix however.
restonrex
3 posts
 
Had a similar problem which turned out to be the cable TV feed coming in my place. Once I placed a ground device on it, hum was gone.
bournnw
5 posts
 
Did you find the source of your problem? I have a low hum with my Rotel 5 channel, 200 watt amp. I have tried all the above, except the cheater plug, to no avail.

I tested the "little brother" to this amp--the 125 watt version--without a problem. Could the amount of additional power required to operate the bigger amp be part of the problem?

Please post if you've found a solution. I'm slowly being driven crazy by the alternating frustrations of hearing the hum and trying to eliminate it. Thanks.

Scott
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