Rig Issues

[bodombeachterror]

Hey Guys

I'm facing an issue with my Blackstar for some odd reason. i hear some sort of a noise when i plug the ht 50 into the ht 412A cabinet. its some sort of a unpleasant sound that pops out after a few mins from the cabinet. So far when i use emulated out its perfect. Since two days i started using cabinet and this happens.

Could anybody suggest what could be the issue as i'm supposed to gig with it this sunday??

Cheers

[bodombeachterror]

This looks like an issue with the head itself mostly. Tried other heads on the cab and its fine. Guessing something wrong from the power amp section maybe, looks like

[Sonofarich]

Without more info...tubes would be a guess. If you have spares, swap them out to see if you can isolate the problem.