I'm using an integrated PrimaLuna EVO 200 with Spatial Turbo speakers (open baffle). I have a mix of crackle and hum from the right channel. The TT, amp, CD player are all connected to the same power outlet source. The crackle and hum is from the right speaker only and it is intermittent without any pattern that I can notice. So the crackle and hum is not all the time.
What I've done without any luck:
I changed the speaker cables.
I swapped the speakers from left to right - crackle and hum is still from the right channel. So, it is not a speaker issue, I think.
I've unplugged the sub.
This seemed to have happened after one KT88 and auto bias fuse blew. Those were replace with a new fuse and EL34's
I'd appreciate any advice or tips or things to try out.
Thanks.