significant noise coming from inside the amplifier Loxjie A30, Topping PA3s

[Mitchell]

I sent back the topping PA3s thinking I had gotten a bad one ... this amplifier, a different make and model Loxjie A30 is doing the same thing.. I know i need to investigate the wall outlet ground connection. seems to be the only answer.

any one had similar experience? this noise is coming strictly from inside the amp, only when there is a load on the output. goes away when the speaker is disconnected

need to figure this out because it sounds fantastic but i can't tolerate the noise.

 

[AnalogSteph]

That has to be the output inductors making noise, depending on whatever frequency the oscillator happens to be running at. Possibly a disadvantageous combination with speaker / cable impedance. Very hard to get rid of, generally.

 

[AnalogSteph]

Here's a potential solution to your problem. It's sort of the opposite of what I thought was going on.

 

[Mitchell]

Here's a potential solution to your problem. It's sort of the opposite of what I thought was going on.

I'm trying to find inductors similar to those for sale in the US. I hardly even understand inductors. Do the specs on the inductor matter, will the wrong ones affect the audio signal?

 

[Mitchell]

I'm trying to find inductors similar to those for sale in the US. I hardly even understand inductors. Do the specs on the inductor matter, will the wrong ones affect the audio signal?

Here's a potential solution to your problem. It's sort of the opposite of what I thought was going on.

nevermind, i sent the damn thing back. So my Definitive Tech SM55's are too difficult of a load for the A30, fine.