electrical noise

I am seeing and hearing a fair bit of unintended noises coming from the USB-powered Audient ID4 mk. II Silence, normalised to 0dB: Zoom-in Observations so far: The noise can be heard when PC is idle. It gets worse when GPU is busy It gets better when CPU is stressed. Even then, there are...

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...

I have a Denon 4700 AVR in pre-out mode connected to an external amplifier with a high-level connection to an REL sub. When I used a stereo 3.5mm cable for the 12V trigger out to the amp it caused the subwoofer to make a popping sound when the external amp powered on and off via the 12V trigger...

So after a week of playing with the QCC china Modules i see they are varied in what they give you in functionality and issues The most annoying thing being noise issues with the new stuff and any amp that goes near the circuit The CSR8645 with the built in amp on the PCB you get no or...