Hi everyone, I purchased a new computer from Amazon in September and when I connected it to my amplifier and switched the amp on, there was a crackling sound coming from the speakers, regardless of how high I set the volume. Using the scroll wheel on my wireless mouse intensified the sound which evidenced that it caused interference. The company that sold the computer (through Amazon) suggested using a shielded cable, which I tried but it made no difference. I sent the computer back and got a different one from Amazon and now I have the exact same problem. The amp is an SPL 300 series connected to two Kef speakers and the computer brand is OCHW, with an AMD processor. Does anyone have any advice about getting rid of the noise?