grounding & hum questions...

Discussion in 'AV Receivers' started by Aris A, Mar 15, 2004.

  1. Aris A

    Aris A Stunt Coordinator

    Joined:
    Mar 29, 2002
    Messages:
    55
    Likes Received:
    0
    Trophy Points:
    0
    I need some advice from all you tech savies out there. I have a Sherwood am9080 amp and I noticed a ground terminal at the back of it. Now do I still need to hook it up to a receptacle or the power cord ground is good enough?

    I do have a sub which constantly hum...any suggestions?
    Thanks.

    Aris
     
  2. Wayne A. Pflughaupt

    Moderator

    Joined:
    Aug 5, 1999
    Messages:
    6,208
    Likes Received:
    56
    Trophy Points:
    9,110
    Location:
    Katy, TX
    Real Name:
    Wayne
    Does the receiver have a phono input? That’s usually what ground terminals are for.

    The hum from the sub (assuming it’s not somehow defective) is usually caused by a ground loop. Typical sources are a cable TV feed, a satellite dish that has the grounding block connected somewhere else besides the house electrical ground, and lighting dimmers.

    Regards,
    Wayne A. Pflughaupt
     
  3. Aris A

    Aris A Stunt Coordinator

    Joined:
    Mar 29, 2002
    Messages:
    55
    Likes Received:
    0
    Trophy Points:
    0
    Wayne,

    The AM9080 is a power amp...sorry I forgot to specify. Any suggestions how to deal with the ground loop. thanks

    Aris
     

Share This Page