Hum in speakers

Discussion in 'Archived Threads 2001-2004' started by David Sorenson, Oct 12, 2001.

  1. David Sorenson

    David Sorenson Stunt Coordinator

    Joined:
    Jan 19, 2001
    Messages:
    92
    Likes Received:
    0
    Trophy Points:
    0
    I recently got a Rotel 965 receiver and paradigm studio 20's. I noticed a slight hum in the speakers, even with the volume turned to min. At Max it it louder. I don't remember hearing a hum on my old Marantz SR73 with Paradigm Mini Mk II's. What could be causing this?
    ------------------
     
  2. BryanZ

    BryanZ Screenwriter

    Joined:
    Dec 18, 2000
    Messages:
    1,213
    Likes Received:
    1
    Trophy Points:
    0
    Looks like you have a ground loop in there somewhere. Possibly even coming from your cable.
     
  3. David Sorenson

    David Sorenson Stunt Coordinator

    Joined:
    Jan 19, 2001
    Messages:
    92
    Likes Received:
    0
    Trophy Points:
    0
    I'm not too familiar with ground loop problems. The cables used on the system are all good quality...better than the stuff I used to have.
    ------------------
     
  4. Saurav

    Saurav Cinematographer

    Joined:
    Feb 15, 2001
    Messages:
    2,174
    Likes Received:
    0
    Trophy Points:
    0
    I think he meant "cable" as in "cable TV", not the cabling you're using in your setup. Try disconnecting the "cable TV" cable and see if the hum goes away.
     
  5. Jeremy Hegna

    Jeremy Hegna Supporting Actor

    Joined:
    Nov 28, 2000
    Messages:
    812
    Likes Received:
    0
    Trophy Points:
    0
    "Try disconnecting the "cable TV" cable and see if the hum goes away."
    If that doesn't work, buy a cheater plug for your amplifier cord. Just plug in the cheater, then to the wall and the buzz should be eliminated.
    Jeremy
     
  6. Henry W

    Henry W Stunt Coordinator

    Joined:
    Jan 31, 2001
    Messages:
    128
    Likes Received:
    0
    Trophy Points:
    0
  7. Chris Ryan

    Chris Ryan Agent

    Joined:
    Apr 14, 1999
    Messages:
    29
    Likes Received:
    0
    Trophy Points:
    0
    What exactly is a "cheater plug"?
    Chris
     
  8. Vasanth B

    Vasanth B Stunt Coordinator

    Joined:
    Aug 18, 2001
    Messages:
    61
    Likes Received:
    0
    Trophy Points:
    0
    A "cheater plug" is nothing more than a 3 prong to 2-prong (ungrounded) adapter. It allows you to plug a grounded 3-prong device into a ungrounded 2-plug wall socket. This effectively cuts the ground wire when used with a normal 3-prong socket so that you eliminate the ground loop by opening the circuit.
     
  9. Tom Morgan

    Tom Morgan Stunt Coordinator

    Joined:
    Aug 1, 1999
    Messages:
    119
    Likes Received:
    0
    Trophy Points:
    0
    When using a cheater plug *be careful*. I would hate to see anyone get shocked just because they touched their amp and another component at the same time. I might use one for troubleshooting but I would not leave one on my equipment. Isn't it illegal in some locations for safety reasons to use cheater plugs? If you have cable TV and that is what is causing the hum, call the cable company, they should ground their stuff properly and I think they are required to by law. If that does not work I would try the isolation transformers on the cable line. If you have DSS the transformers will not work because it needs to pass DC for the Sat. rec. Good luck and stay safe.
    ------------------
    [​IMG]
    Tom&Amy's DVD's
     

Share This Page