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Cab clone strangeness - low freq. pulsating feedback

Posted: Mon May 06, 2019 6:38 am
by mace
Hi, Last gig was at a club and a strange thing happened for a second time. I was using the cab clone on the Mark V for the drummer's monitor only (small place). On about the 2nd or 3rd song there was this feedback sound coming out of the PA. It seemed to be happening when I played (mics were muted) so I turned off the Mark V. The feedback was still there. I then unplugged XLR cable from the Cab Clone and the feedback stopped. This exact same thing happened the last time we played at this same venue. I wouldn't have thought to unplug the XLR even after the Mark V was off but I remembered that this happened before. I remember thinking "the amp is off, the feedback can't be from me". But it was!

It is as if some signal is being induced in the Cab Clone either from a very loud bass guitar standing wave (seems not likely) or some kind of weird signal is going into the Cab Clone from the mixer board from the XLR cable.

I've gigged with the cab clone dozens of times, at stupid loud volumes sometimes, and this venue is the only place that this feedback or pulsating resonance has occurred. I'm curious what it could be.

Has anyone experienced anything like this? I do have the audio of the gig and I'll post the feedback sound when I can figure out where to upload it.

Thanks!