hum comming from speakers
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Joined: Mar 2006
Posts: 14
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OP
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Joined: Mar 2006
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When I turn down the volume I can here a hum from my new speakers. Is there a filter that will take care of this.
M80 V2,QS4
VP100, Panasonic 37" plasma HDTV
EP175 Denon 975, XBOX 360
Viper speaker cables
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Re: hum comming from speakers
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Joined: Dec 2005
Posts: 3,301
connoisseur
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connoisseur
Joined: Dec 2005
Posts: 3,301 |
What speakers are you using, and are you using an amp?
A computer once beat me at chess, but it was no match for me at kick boxing.
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Re: hum comming from speakers
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Joined: Mar 2006
Posts: 14
frequent flier
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OP
frequent flier
Joined: Mar 2006
Posts: 14 |
My speakers are
M80
QS4
VP100
EP175
Denon AVR 975 with all Viper speaker cables
M80 V2,QS4
VP100, Panasonic 37" plasma HDTV
EP175 Denon 975, XBOX 360
Viper speaker cables
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Re: hum comming from speakers
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Joined: Dec 2005
Posts: 3,301
connoisseur
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connoisseur
Joined: Dec 2005
Posts: 3,301 |
A computer once beat me at chess, but it was no match for me at kick boxing.
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Re: hum comming from speakers
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Joined: Mar 2006
Posts: 14
frequent flier
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OP
frequent flier
Joined: Mar 2006
Posts: 14 |
I will give it A try
Thanks
M80 V2,QS4
VP100, Panasonic 37" plasma HDTV
EP175 Denon 975, XBOX 360
Viper speaker cables
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Re: hum comming from speakers
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Joined: Jan 2002
Posts: 3,270
connoisseur
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connoisseur
Joined: Jan 2002
Posts: 3,270 |
Hi Frogspawn,
While you're at it, here are some updates to that article of mine on hum problems:
First, try disconnecting your subwoofer from the coaxial sub cable from your AV receiver. Does the hum go away? If it does, then the ground loop is entering from your AV receiver/video gear.
Before you try any of the hum isolation devices I recommend, first try plugging the subwoofer into a different AC outlet in the room, ideally one that is not on the same circuit as your AV receiver and video equipment (TV, DVD player, sat or cable TV box, etc.) That may solve the problem. If it doesn't, see if the back panel of your sub has a "ground-lift screw". It will be labeled as such. Just remove it. That may remove the hum.
If not, try these:
Cable-TV systems are seldom at "zero ground potential", which means you'll get ground-loop hum when you integrate any audio-video gear with a cable-TV or satelllite feed.
Try ordering one of these video ground isolators and install it in-line with the cable before it enters your set-top cable-TV box:
http://www.partsexpress.com/pe/showdetl.cfm&DID=7&Partnumber=180-075
IF that still doesn't elimiinate the hum, you could try one of these from Radio Shack, which goes between the subwoofer and the coaxial cable from your Denon:
http://www.radioshack.com/search/index.jspkwCatId=&kw=ground%20isolator&kw=Ground+isolator
I would first try the in-line video ground isolator from Parts Express.
Let me know how you make out. With persistence, all ground-loop problems can be solved.
Regards,
Alan Lofft, Axiom Resident Expert (Retired)
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Re: hum comming from speakers
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Joined: Apr 2005
Posts: 2,339
connoisseur
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Posts: 2,339 |
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Re: hum comming from speakers
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Joined: Mar 2006
Posts: 14
frequent flier
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OP
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The hum is comming from the Subwoofer. If I uplug the RCA cable to it the hum goes away. I will try the Coax filter first
M80 V2,QS4
VP100, Panasonic 37" plasma HDTV
EP175 Denon 975, XBOX 360
Viper speaker cables
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Re: hum comming from speakers
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Joined: Mar 2006
Posts: 14
frequent flier
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OP
frequent flier
Joined: Mar 2006
Posts: 14 |
This iteam
www.partsexpress.com/pe/showdetl.cfm?&DID=7&Partnumber=180-075
Is not compatable with DTV recivers. The signal on some of the channels will not pass through the device. Just a FYI
Last edited by Frogspawn; 03/18/06 05:19 AM.
M80 V2,QS4
VP100, Panasonic 37" plasma HDTV
EP175 Denon 975, XBOX 360
Viper speaker cables
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Re: hum comming from speakers
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Joined: Jul 2002
Posts: 958
aficionado
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aficionado
Joined: Jul 2002
Posts: 958 |
My sub causes a hum as well. I solved it with a 49 cent cheater plug.
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