If you reed the post he did swap monoblock
"swap the mono block - still the same noise"
Ok in order try these they cost nothing.. The way a mechanic would kinda do it..
1. Noisy valve, ay? You have a tube making noise? (Swap valves left to right for a check)
2. The mono blocks aren't on the same plug? Make sure they are plugged into the same rail on the meter. For now the same wall plug, or maintainer will work.
3. Make sure the IC (source to preamp AND preamp to amp) are tight, clean, and plugged all the way in.
4. Get a cheater plug for the ground. Eliminate the ground with the cheater, ONE amp at a time. Repair the ground loop as needed. add a ground wire between the two amps, chassis to chassis.
You gave a good report, OP a lot better than most..
I'll give it a guess, a noisy valve, or a ground loop issue between the two monoblocks..
Happy hunting.
Regards
"swap the mono block - still the same noise"
Ok in order try these they cost nothing.. The way a mechanic would kinda do it..
1. Noisy valve, ay? You have a tube making noise? (Swap valves left to right for a check)
2. The mono blocks aren't on the same plug? Make sure they are plugged into the same rail on the meter. For now the same wall plug, or maintainer will work.
3. Make sure the IC (source to preamp AND preamp to amp) are tight, clean, and plugged all the way in.
4. Get a cheater plug for the ground. Eliminate the ground with the cheater, ONE amp at a time. Repair the ground loop as needed. add a ground wire between the two amps, chassis to chassis.
You gave a good report, OP a lot better than most..
I'll give it a guess, a noisy valve, or a ground loop issue between the two monoblocks..
Happy hunting.
Regards