Low level buzzing coming from tweeters.

I now have a low level buzzing coming out of my tweeters even when i am in mute. It happens even with the amp on and preamp off never had this before.Any suggestions would be great.Thanks in advance.

ebm01-01-2018 4:46pm

Showing 8 responses by atmasphere

atmasphere Details Discussions Posts This discussion Message User 11,606 posts 03-02-2018 at 09:36pm Copy Comment URL Report Comment Edit Delete IMO, you are best served by complying with NEC and local codes. That usually requires stakes in the ground bonded to the ground in the service panel. @cleeds Actually I agree 100% with the code thing. Installing non-code grounds is asking for trouble! In some areas, the ground is handled by a stake, but that can be problematic so often metal water pipes are used instead as they can be a more reliable ground (this is code in my town). If a stake is the only ground connection, the problem can be that if its a dry environment, it won't really be a good ground. I'm more concerned here about installations that I've heard of people doing where they ground a stake in the yard and then run their audio system grounds to it- a Bad Idea IMO/IME. Rep
atmasphere Details Discussions Posts This discussion Message User 11,606 posts 03-01-2018 at 05:07pm Copy Comment URL Report Comment Edit Delete FWIW, you are far better off if the ground is tied to the water mains as is traditional. Stakes in the ground tend to be variable, and if the ground connection is indeed on the water mains, the stake in the ground should not be used at all unless all your water connections involve plastic pipes.
atmasphere Details Discussions Posts This discussion Message User 11,606 posts 02-28-2018 at 05:48pm Copy Comment URL Report Comment Edit Delete The amps are on a dedicated 30 amp breaker, the rest of the system on a dedicated 20 amp. There is an outdoor imbedded ground for, I believe, the entire system. Is this a stake that someone put outside somewhere to make a ground?
atmasphere Details Discussions Posts This discussion Message User 11,606 posts 02-27-2018 at 07:09pm Copy Comment URL Report Comment Edit Delete Usually the AC power comes from two halves of the incoming 240V from outside the house. If the amps are on one half and the rest of the system on the other, sometimes you can get hum if the amplifier's grounding isn't really worked out all that well. So the extension cord may be going to an outlet on the same side of the AC power as the preamp's power is. If OTOH the preamp and amp share the same outlet than something else is at play.
atmasphere Details Discussions Posts This discussion Message User 11,606 posts 02-21-2018 at 07:22pm Copy Comment URL Report Comment Edit Delete Gotta be the amps? Yes.
atmasphere Details Discussions Posts This discussion Message User 11,606 posts 02-16-2018 at 10:28pm Copy Comment URL Report Comment Edit Delete @ncarv If a tube is doing this, it won’t be one of the output tubes. They can make cracking and popping sounds but a low level buzz is unlikely.
atmasphere Details Discussions Posts This discussion Message User 11,606 posts 02-14-2018 at 06:30pm Copy Comment URL Report Comment Edit Delete The amps are old VTL Deluxe 500's and, though the caps were replaced, there is some transformer hum. I'm wondering if it has just gotten worse over time and is transmitting to the speakers. Probably not. But depending on how the tubes are lit, if any of the tubes have developed leakage (as measured on a tube tester) that could easily be causing your problem.
atmasphere Details Discussions Posts This discussion Message User 11,606 posts 02-09-2018 at 09:38pm Copy Comment URL Report Comment Edit Delete @ncarv Short the inputs to the amps- if not shorted and no input, a buzz might be normal.

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