Subwoofers on hard wood floor, should i put them on a square peice of carpet?

Discussion in 'GENERAL AV Discussions' started by amayseng, Jan 11, 2018 at 8:27 AM.

  1. amayseng Junior Audioholic

    amayseng
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    Yep that is it. When I unplugged one subwoofer the hum goes away. When i plug it back in the hum returns.

    I only have one outlet on that wall can I use a power condotioner or anything?
    Setup:
    Tv
    Ps4
    Router
    Modem
    Av
    2 subwoofer tramsmitters.
  2. amayseng Junior Audioholic

    amayseng
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    Turning down the gain decreases hum.
  3. lovinthehd Audioholic Warlord

    lovinthehd
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    I figured the transmitters and the bulk of your gear are on the same single outlet mentioned, but if you have wireless receivers figure your receivers/subs are placed elsewhere? You can always try a cheater plug on the sub end, if they're three prongers, to see if you can eliminate the hum that way before taking a more permanent measure (or not, if that solves the problem but of course that has risk).
  4. amayseng Junior Audioholic

    amayseng
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    Yes the subs are on 2 different walls/outlets and the av/tv and such is on another separate wall/outlet.
    What is a cheater plug?
    The subs plugs are only 2 prongs
  5. amayseng Junior Audioholic

    amayseng
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    Nm 3 prong to 2 prong. Gotcha
  6. lovinthehd Audioholic Warlord

    lovinthehd
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    Then the cheater plug wouldn't help as it converts a three prong to a 2 prong. One of these.

    You may still be dealing with ground loop hum, tho.
  7. amayseng Junior Audioholic

    amayseng
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    Its gotta be the Sunfire wireless system. Even with one sub i am getting the humming.
    With the klipshs built in wireless subs they dont hum. Using the sunfire it hums
    Defective product?
  8. lovinthehd Audioholic Warlord

    lovinthehd
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    Could be it's simply more susceptible to hum but I don't really know...
  9. amayseng Junior Audioholic

    amayseng
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    Ya i was running 2 klipschs wireless built in and 2 transmitters no hum perfect.
    Got the polk running off sunfire wireless and left one klipsch with it and hum.
  10. amayseng Junior Audioholic

    amayseng
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    And some bumbling coming through as well. I'd say def the transmitter. I expected more from Sunfire.
  11. lovinthehd Audioholic Warlord

    lovinthehd
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    Sunfire isn't particularly worthy IMO, at least not since Bob Carver left. Why do you think the issue is at the transmitter end and not the receiving end?
  12. amayseng Junior Audioholic

    amayseng
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    My house is old and I just realized that I was already using the cheater plugs to plug my surge protectors into the outlet however using the cheater plug which is two prong I never screwed the ground into the outlet with the screw which I read will ground the plug. Is this why I'm having ground Loop hum? I am away from home therefore I have not tried it but when I get home I'm going to put the screw through the cheater plug into the outlet to grounded. Do you think this is why? Thank you again for all your help I truly appreciate it
  13. amayseng Junior Audioholic

    amayseng
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    I'm I'm not sure which unit is causing problems however I am receiving another receiver tomorrow and I will swap it out and make an assessment
  14. lovinthehd Audioholic Warlord

    lovinthehd
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  15. amayseng Junior Audioholic

    amayseng
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    Both subs are on separate walls and both of those walls are separate from the wall/outlet that tehe reciever,tv,transmitter, router and such are plugged into.

    So each sub has their own wall and outlet from the main unit.

    If that makes sense
  16. lovinthehd Audioholic Warlord

    lovinthehd
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    That doesn't mean that exempts them from ground loop hum issues....
  17. amayseng Junior Audioholic

    amayseng
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    Ok so if I am running one or two Klipsch subs which are built in wireless and 150w rms each there is NO hum anywhere.

    When i run one Polk which is 300w rms on Sunfire wireless there is hum.

    If the Polk is wired no hum.

    Has to be the Sunfire.

    I am going to try audioengine they have hundreds of users and good reviews.
    Last edited: Jan 14, 2018 at 9:49 PM
  18. TheWarrior Audioholic Samurai

    TheWarrior
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    The wireless controllers are probably one component too many on one circuit. When you have that many electronic devices sharing the same signal, and the same ground, you can induce a hum.

    It doesn't matter if you are using separate outlets, you are using one circuit which is connected to one ground. That shared ground is the issue, and why you need multiple circuits.
  19. amayseng Junior Audioholic

    amayseng
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    Ok but whwn I remove the Sunfire wireless transmitter then plug back in the klipsch and use that wireless transmitter and sub there is no hum. Switch back to the sunfire and hum returns.
  20. TheWarrior Audioholic Samurai

    TheWarrior
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    Ohhhhhh you have two wireless transmitters going!

    If the subs have them built in, why would use an external one?

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