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8030A intermittent hum/hiss

fabio, modified 5 Years ago.

8030A intermittent hum/hiss

Youngling Posts: 1 Join Date: 11/30/16 Recent Posts
Hi,
one of my 8030A makes a mid freq hum/hiss noise: it is intermittent (i.e. goes on for some minutes, then stops, then starts again). It only does that when connected to a source which is connected to ground (e.g. preamp, TV, audio card, mixer) but it does not if I connect a "floating" source (e.g. iPad, iPhone).
Of course I tried changing audio and power cables, with no success.
Has this happened to anyone? Suggestions?

Thanks!
manutal, modified 5 Years ago.

Re: 8030A intermittent hum/hiss

Jedi Knight Posts: 180 Join Date: 4/25/14 Recent Posts
That's the problem with the analog side. The monitors can easily take disturbance from pretty much whatever. Had the same problem before I went digital. I had problems when I had a computer(PC) via hdmi to the pre-amp, it hissed and hummed.

try to move the cables away from eachother. the signal cable away from any power cables etc.
I noticed when I move the cable the humm/hiss from the monitor changes.