I bought the Advance paris x-a160 power amplifier, used, on ebay.

It's phenomenal! I love it.

But I have a concern. When I first it on, the VU meters oscillating a bit for maybe 30 seconds, and then there is always a crackling sound out is the right channel speaker.

I swapped out the RCA cables that came with the wiim pro plus for audiophile RCA cables. I also swapped out the wiim pro plus for a wiim ultra bit there is no difference.

Is this something I should be concerned about?

I'm still within the return window.