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Unread Jun 6th, 2007, 02:03 PM   #1 (permalink)
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Default White noise in speakers

Hey all. I've got a standard Teac stereo receiver (nothing special) and a pair of JBL bookshelf speakers. I recently moved and when I set up my system again, I get a lot of static coming from the speakers. No matter what input I'm using (CD, Radio, Input from computer) or volume level, I get a steady, and noticeable amount of feedback coming through. I've restripped all of my speaker wiring and I'm not sure what else the problem could be.

Thanks for any help,

JJ
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Unread Jun 6th, 2007, 08:41 PM   #2 (permalink)
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Is the amp fed from the same receptacle as the other gear? Is your definition of 'white noise' high frequency or a low frequency hum?
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Unread Jun 6th, 2007, 10:59 PM   #3 (permalink)
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Does the noise increase with volume or is it constant? Either way, something got knocked loose inside and it will need to be serviced. Sounds like a volume potentiometer.
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Unread Jun 6th, 2007, 11:53 PM   #4 (permalink)
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Quote:
Originally Posted by kandiravah
Is the amp fed from the same receptacle as the other gear? Is your definition of 'white noise' high frequency or a low frequency hum?
white noise is white noise => all frequencies mixed.
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Unread Jun 7th, 2007, 12:26 AM   #5 (permalink)
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No, the volume of the feedback in the speakers doesn't change when I change the volume. Whether the volume is set to max or min or whatever input it's set to (CD, Aux, Radio) I get the same static. Its not a hum, just static.
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Unread Jun 7th, 2007, 03:52 AM   #6 (permalink)
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'k.....i think i'd disconnect all the inputs at the back of the receiver....if the noise stays......your amp's apparently gotten dribbled one too many times before shooting......if the static goes away, then reconnect each input one at a time until the noise appears.....the input you just connected is the source.

However, i'm betting with all inputs disabled, the static stays.....the volume control is in a stage ahead of the final amplifier, and if the static doesn't change with the volume control, then the amp's got a problem between the output stage and the volume control stage, or in the output stage itself..... If it's only one channel affected, then i would suspect a driver stage or output transistor array that's gone noisy or a bypass capacitor went west. If it's in both channels, i would suspect power supply probs in the amp.

If the static disappears with the inputs connected, then that's a horse of a different color
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Unread Jun 7th, 2007, 06:50 AM   #7 (permalink)
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Like kandiravah and Toxis I fear for the worst, sounds like a poti prob but just for good measure, shift your speakers and Amp around in your room. A friend of mine had interference caused by some piping running thru the wall where his stuff was placed.

Just hope you don't have a Poltergeist...
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Unread Jun 7th, 2007, 07:44 AM   #8 (permalink)
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Quote:
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Just hope you don't have a Poltergeist...
Yeah or maybe it's the bugs planted by the FBI that are interfering
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Unread Jun 9th, 2007, 11:47 PM   #9 (permalink)
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Quote:
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Yeah or maybe it's the bugs planted by the FBI that are interfering
+1 just because your paranoid doesn't mean there's not somebody out to get you....
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Unread Jun 10th, 2007, 03:21 AM   #10 (permalink)
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damn. and the milk looks outdated too
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Unread Jun 10th, 2007, 10:40 AM   #11 (permalink)
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Quote:
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damn. and the milk looks outdated too
See, i told you it's the feds. That always happens when they are after me too!
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Unread Jun 10th, 2007, 11:03 PM   #12 (permalink)
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That's a strange problem. It must be interference.
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Unread Jun 11th, 2007, 10:17 PM   #13 (permalink)
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check your wires. I had the same problem when my decks ran through my computer. Just a terrible hum. Got the cables replaced and everything's been fine ever since. I'd also mess with some of the electronics in the room. My cellular phone causes a terrible interference everywhere i go. I can hear it through my car stereo, television set. Even my monitor starts computer monitor starts blinking like crazy when i get a call and the cell's next to it. Or maybe, it's your someone from the other side trying to reach you
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Unread Jun 11th, 2007, 11:38 PM   #14 (permalink)
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I get a pretty good hum through my stereo speakers when I have my computer audio running through a selector box to the receiver. I have several things hooked up to my stereo through this selector box. It's kinda weird how only the computer audio buzzes out of all the things hooked to the box. When I have just the computer audio cables hooked directly to the receiver it doesn't buzz. I wish I could use the little selector box without the buzz!! It's like all the cables from the other components are backfiring into the computer or something isn't grounded properly.
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Last edited by Trance88 : Jun 11th, 2007 at 11:43 PM.
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Unread Jun 13th, 2007, 03:12 PM   #15 (permalink)
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i think your going deaf mate..
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Unread Jun 13th, 2007, 03:13 PM   #16 (permalink)
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Quote:
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See, i told you it's the feds. That always happens when they are after me too!


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Unread Jun 22nd, 2007, 09:21 PM   #17 (permalink)
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Doesn't all noise/sound make up white noise? Like all colors make up white light?
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Unread Aug 14th, 2007, 12:04 AM   #18 (permalink)
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Hey all, just so you know, I took the receiver into the shop, and it turns out a cold solder joint on a resistor was causing the interference...


...or maybe thats what CSIS is telling them to tell me....
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Unread Aug 14th, 2007, 03:23 PM   #19 (permalink)
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glad u found a solution
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Unread Sep 24th, 2010, 07:06 AM   #20 (permalink)
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Can anyone help me please? I've just bought a pair of QSC K8 speakers. I'm using my laptop to run the music from. My problem is that i'm getting white noise through the speakers. As soon as I pull the power lead out of the laptop it stops. I've tried plugging straight into a 13 amp rather than on an extention lead. I've also tried using another laptop and I got the same white noise. I didn't have the system turned up loud either, as I turned up the volume the white noise increased. On my old set of speakers I did have a certain amount of white noise but not like this and that was only when I had the volume turned up very loud.

I would really appreciate any help, Thanks
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