Blackstar cab-wrongly put 16ohm head into stereo cab input-help!

[Twinfan]

Try swapping valves around, particularly preamp v1 - that may well be your crackle issue.

Connecting the wrong speaker load won't affect the preamp tubes.

Yeah I know that Frank, I was thinking the crackle was unrelated to the speaker load mismatch  ;)

[JacksonRR]

Actually the sound is more noticeable on the gain channel, so when i increase the channel volume to max and turn the master vol to 0 the noise is still there (yet reduced in volume) BUT when i turn the channel vol down to zero and turn the master vol all the way up i don't get any of the swishing sound. This tells me its the preamp tubes right?

Not necessarily, but more than likely. The best test to divide and conquer, would be to try another preamp, pedal or just straight plugged into the effects loop input, serial or set for 100% effects signal if parallel. This way you can just play the power amp and if nothing comes up, you can focus on what's before.

[Frank]

Try swapping valves around, particularly preamp v1 - that may well be your crackle issue.

Connecting the wrong speaker load won't affect the preamp tubes.

Yeah I know that Frank, I was thinking the crackle was unrelated to the speaker load mismatch  ;)

I know you know that! There's a couple of issues getting muddled in the thread, that's all.

[Twinfan]

Indeed - there's a lot going on!  :lol: