Faint buzz in speakers
There is a very faint buzz coming from speakers with amp on, but with no music stream playing. Can only be heard with ear right up to drivers. No buzz with amp off or muted. Decent amp & cabling. Is this faint buzz likely still there under music when it’s playing? Numerous noise reduction devices deployed including dedicated circuit, robust grounding, balanced power transformer, various filters. Thoughts?
Two things to try. Turn off every other breaker in your home. if that makes the problem go away you may have some device introducing DC. This happens when a device/appliance sucks more on one side of the waveform than another. Often in very cheap DC supplies. If it's still buzzing, disconnect all inputs. |
@jmfinney I had exactly the same issue! After replacing US brand pre+amp with Accuphase C2420+AD2820 + P4500/A48, such noise disappeared! |
@OP Some amplifiers have small amounts of residual noise thought it should usually manifest itself as white noise, but there can be other noise as well. It is also possible that one or more of your noise reduction devices are causing the noise - including your balanced power unit. Take them all out of circuit and introduce them one by one. If the noise is still there after that, its most likely the amp itself. However, if you can't hear it from the listening position I wouldn't sweat about it. |
Before tackling the audio interconnects, disconnect any video or ethernet devices. An RCA out to a TV that has a satellite cable in or an HDMI from another device plugged in elsewhere can be the problem. The additional shielding on “better” ethernet cables, like CAT-7 instead of CAT-6, can also be the problem. Ethernet is itself by design fine. But the shielding on a cable can be the problem... Re: bug zapper comment above... yes, keep it off the house ethernet ;-) |
