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Oscillation from 2 head rig
Posted: Fri Sep 06, 2019 9:15 pm
by WORMDIRT
So I'm running 2 heads into a single stereo cab and I'm getting crazy oscillation
I tried using a stereo pedal, Daisy chaining from the inputs different cables all the usual suspects. I've done many multiple head rigs and have never had the problem. What gives?
I figured you guys have the most multi-head rigs per capita haha and might have some insight
Re: Oscillation from 2 head rig
Posted: Fri Sep 06, 2019 11:00 pm
by whoismarykelly
Is it a sealed cabinet? I would not run separate heads into a single cabinet. Phase issues can wreak havok.
Re: Oscillation from 2 head rig
Posted: Fri Sep 06, 2019 11:04 pm
by WORMDIRT
It is a sealed cab.
It squeals as I turn up the volume, even with a tuner on.
I'm not too stressed about phase, I can whip up a box to reverse the phase no problem
Re: Oscillation from 2 head rig
Posted: Sat Sep 07, 2019 12:36 am
by crochambeau
Are you absolutely certain the two halves of the cabinet are electrically isolated?
I trust each amp on its own behaves okay on a similar load isolated from others. It sounds like the oscillation occurs when no signal is at input?
Does the oscillation occur when nothing is plugged into the input?
Re: Oscillation from 2 head rig
Posted: Sat Sep 07, 2019 1:49 am
by WORMDIRT
crochambeau wrote:Are you absolutely certain the two halves of the cabinet are electrically isolated?
I trust each amp on its own behaves okay on a similar load isolated from others. It sounds like the oscillation occurs when no signal is at input?
Does the oscillation occur when nothing is plugged into the input?
Damn that's a good point. Both jacks ground to the plate they're mounted to. I bet plastic jacks would 100% solve the issue.
They play nice until I plug a cable in and are fine on their own.