View Full Version : Annoying "buzz" coming from speaker tweeter
Lately noticed a quite annoying high frequency "hum" or "buzz" coming from the tweeter of my right speaker. It starts when I power up the system from cold and lasts a good 20-25 minutes before going completely. After that, and when system is properly warmed up, no problem whatsoever. :scratch:
Any ideas, troubleshooting or remedies?
Cheers
John
Wives normally emit high pitched noises when you go near your hifi:lol::D
PaulStewart
06-03-2012, 02:00
Swop the cables, if the problem moves to the other one, the fault is further up the chain. Is it only with one source? If it is and the fault moved when you swopped speaker cables over, then the fault is in the amp and and could be a component breaking down. Again swop cables, this way you can see if it is in the pre or one of your monoblocks. If you isolate the problem to the speaker, it could be a distorted coil in the tweeter that sorts its selfvwhen they warm up, but I think it's more likely to be somewhere up the chain.
Hope this helps
Swop the cables, if the problem moves to the other one, the fault is further up the chain. Is it only with one source? If it is and the fault moved when you swopped speaker cables over, then the fault is in the amp and and could be a component breaking down. Again swop cables, this way you can see if it is in the pre or one of your monoblocks. If you isolate the problem to the speaker, it could be a distorted coil in the tweeter that sorts its selfvwhen they warm up, but I think it's more likely to be somewhere up the chain.
Hope this helps
Is this a tube or sand amp?
Hey guys,
Thanks for the input. The hum comes up when I switch the system on, and on all sources (CD, Tuner and T/T) - I will try switching the cables around and maybe try and use one amplifier at a time to see whether the fault lies there.
How do you explain the fact that the hum disappears after a little while?
Is this a tube or sand amp?
I thought valve/tube amps were made of sand too - I think that's where the glass comes from?????
As for the OP's problem. It's going to be a matter of disconnecting all the sources and powering them down. Turn the amp on with no sources and volume down. Is this buzz still there? If so, switch off, swap the power amps L to R and switch on - what happens (be careful, since older versions of these amps had VERY fragile output stages)? If issue isn't there, at all, reconnect one source at a time etc.etc...
Housework - try to ensure mains and signal leads are separated. If they cross, try to make it as near to 90 degrees as possible...
I thought valve/tube amps were made of sand too - I think that's where the glass comes from?????
As for the OP's problem. It's going to be a matter of disconnecting all the sources and powering them down. Turn the amp on with no sources and volume down. Is this buzz still there? If so, switch off, swap the power amps L to R and switch on - what happens (be careful, since older versions of these amps had VERY fragile output stages)? If issue isn't there, at all, reconnect one source at a time etc.etc...
Housework - try to ensure mains and signal leads are separated. If they cross, try to make it as near to 90 degrees as possible...
Cheers
I'll try that.
http://www.fixya.com/support/t1541794-loud_buzzing_upon_starting_after_10
This sounds similar to when I had a valve integrated - turned out to be just a slightly dirty connection on one of the tubes and some removing and reseating a few times cleaned it off and was fine again.. Was in the pre-amp section I think. Is your
That might correlate with it being there while things get to a certain temp (and the metal expands etc) which manufactuers often quote as being about 20 minutes when talking about warm up time (ones that say they are perfect as soon as temps are equalised).
Edit: Err... I see you have a solid state setup. Still sounds like either a connector externally or internally that needs re-seating or could be a slightly dry joint on the circuit even that could get worse over time (I'd say that would be worst case). So try connecting and disconnecting anything that is constant in the chain that has a warming up period (I guess that's pretty much only power amp and pre, including battery connections on the pre).
Many, many thanks for your advice guys. I started by disconnecting and reconnecting all cables (including the power ones) - considering the mass of spaghetti that resides in the back of my system that was a task of Herculean proportions...All seems to be back to normal now - hope it stays that way...
dirty valve pins sounds like rustling leaves
a single channel hum from tweeter sounds rather more specific ..
maybe a dying cap in power amp ?
try swaping the speakers over [swap speaker cables at amp ] see if buz moves
if stays with speaker ..could be a dying tweeter
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