Problems

I just moved, and despite packing all my own gear, I have no idea how rough the movers were with it. Since arriving, some issue have cropped up:
1). Using the Frankenstein monoblock amps, after about 20-30 minutes of use, a loud crackling emits from the right speaker. This comes and goes intermittently, and won't stop until everything is powered down. I switched up outlets, and it remains the same. Checked all the connections- all seem secure. Suppose I should swap out the IC's and see if the noise comes from the other side or the same side, right?
2). I tried using the MastersounD amp. After about 10 minutes, the left channel starts cutting in and out. Switched IC inputs, and the problem stays on same side.
3). I excluded the EAR preamp from the circuit, using the MastersounD as an integrated amp. Left side still cuts in and out.
4). The only common denominator here is using the Ayon CD5 as a source. Have a hard time believing there's a bad tube in there- there are less than 1000 hours on those tubes.

I have a hard time believing there are problems in more than one component. That would be very unusual.

Any thoughts or suggestions to try and narrow this down? I do have a turntable I could use as the source and see what happens as well.

Very frustrated.....