Problem running stereo with GSP1101 and Mesa 50/50

[khall187]

I suppose this would apply to other FX units besides the GSP1101 as well.

My Mesa 50/50 rack has "Input A" and "Input B" as well as an "Output 1" and "Output 2"
I have a 2x12 stereo cab.


My goal: Run my amp in 'stereo' to my 2x12 so that when I use 2 microphones (one on left speaker, and one on the right speaker), I'm able to ask the FOH to pan each L/R to get a wide stereo effect with my delay/flange/etc. No different than 1000's of guys in the past.

My setup: ADA MP1 -> Input of GSP1101 -> L/R line out to "Input A" and "Input B" of my Mesa 50/50 -> Out1 and Out2 to my 2x12 wired in stereo

The problem: I'm not getting any stereo effects out of my cab. For instance, I have a 'panner' effect in the GSP1101 that is supposed to gradually pan the signal from left/right, however on my amp it'll push sound do one speaker, but then when panning to the opposite speaker it just goes silent, then back.


Am I mistaken that I do not have a proper 'stereo' rig? I do I need TWO amps? I thought with a Stereo amp I wouldn't need 2 amps to achieve this?

Any help would be appreciated!!!

PS I'm a new member but love the RT community!

 

[raymitchell]

Sounds like the output on the 1101 is configured to mono/copy left output to right output or someting thereabouts. As a quick test, you could plug the MP1 left right outs into the A & B inuts of the 50/50 and then go to a clean patch and apply the MP1's stereo chorus and see if it is indeed stereo. That way we'll know that the MP1 and 50/50 are behaving the way they should and that the issue lies with the output configuration of the 1101.

Just throwing ideas out there for ya.

P.S. You do not need another amp, the 50/50 is a stereo power amp, so, you're good to go there.

 

[khall187]

Good idea, I'll give that a try. Thanks for your input!

 

[shredhead7]

As was mentioned above, but I also have a Mesa 50/50. When running any patch, turn the volume knob on both channels on the 50/50 down (one at a time) to see what your levels are on each side. It could be that the crossover in your cab is bad, or you have a bad tube, or faulty cable. There are lots of things that it could be, but most likely it is an internal routing issue on the GSP.

I discovered that one of the pots on my triaxis was bad doing this exact thing, I was only getting a signal from one side of my pre.