buzz, hum from speakers

pmckeealaska
pmckeealaska Posts: 808
edited November 2006 in Speakers
I Have a noticible buzz/hum coming from my two main speakers. They are connected to a dedicated 2 channel Rotel amp and not powered by my receiver which I have been having problems with. When I turn off the amp, the buzz goes away, so I know the amp is the source. Any suggested soultions? Thanks.
Music and Movie Rig

Samsung 40" HDTV 1080p
LSi25 Front Speakers
LSiC Center Channel
LSiFX Surrounds
Rotel RB 1080 2-Channel Amp
NAD T763 Reciever
Denon DVD 2900 Universal Player
Audiosource 10 Band Digital Equalizer
Audioquest CV-8 speaker cables
Audioquest Sub-X subwoofer cables
Audioquest King Cobra Interconnects
Monster AVS 2000 Voltage Stabilizer
Playstation 3 120GB Slim
Post edited by pmckeealaska on
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Comments

  • dkg999
    dkg999 Posts: 5,647
    edited November 2006
    If the amp is connected to the receiver, and you have cable TV or sat dish, then you may have a ground loop issue. You can buy a ground loop isolater that goes in your coax from the cable or sat dish that will probably solve the problem. Another thing to look into is power line noise.
    DKG999
    HT System: LSi9, LSiCx2, LSiFX, LSi7, SVS 20-39 PC+, B&K 507.s2 AVR, B&K Ref 125.2, Tripplite LCR-2400, Cambridge 650BD, Signal Cable PC/SC, BJC IC, Samsung 55" LED

    Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC
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  • zombie boy 2000
    zombie boy 2000 Posts: 6,641
    edited November 2006
    Just because the hum goes away when you turn off the amp, doesn't mean the problem is with the amp. First start by checking all electrical items around the house. Turn 'em off one by one and see if the hum disappears with any of them.

    For example, my system hums like a Buddhist monk whenever a cell phone is in use -- even in the next room.
    I never had it like this where I grew up. But I send my kids here because the fact is you go to one of the best schools in the country: Rushmore. Now, for some of you it doesn't matter. You were born rich and you're going to stay rich. But here's my advice to the rest of you: Take dead aim on the rich boys. Get them in the crosshairs and take them down. Just remember, they can buy anything but they can't buy backbone. Don't let them forget it. Thank you.Herman Blume - Rushmore
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  • pearsall001
    pearsall001 Posts: 5,093
    edited November 2006
    Sounds like time for a cheater plug.
    "2 Channel & 11.2 HT "Two Channel:Magnepan LRSSchiit Audio Freya S - SS preConsonance Ref 50 - Tube preParasound HALO A21+ 2 channel ampBluesound NODE 2i streameriFi NEO iDSD DAC Oppo BDP-93KEF KC62 sub Home Theater:Full blown 11.2 set up.
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  • scottnbnj
    scottnbnj Posts: 709
    edited November 2006
    sometimes buzz can just be wire management and/or routing. i try to keep power cords, speaker cable and ic's away from each other and uncoiled, if they have to cross within a few inches of each other, try to route them at 90 degree angles. if you haven't done it recently, this might be a good excuse to clean and reseat connections too. cheap and bad wires can buzz too.

    zombie boy, i had a motorola v400 cellphone that did that and had some other problems if it wasn't turned off every couple of days.

    )
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  • amulford
    amulford Posts: 5,020
    edited November 2006
    Damn, you just ain't having any luck are you?

    That buzz could be a number of things. You could be getting induction, like scott says. Might be a bad ground or loop. Or maybe something on your grid.

    Are you using that M still?
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