tube amp head → Suhr Line-Out Box → stereo fx → Matrix stereo power amp → 3 4x12 cabs. (center cab fed from Suhr’s speaker thru)
This has always worked great, in that once I get unity volume between the Tube Amp & Matrix, I never have to touch the Matrix volume again - the tube amp volume will then act as an overall master volume raising & lowering all 3 cabs in unison. Perfect.
This changed when I added the PS-100 (using its line out) and removed the Suhr Line Out Box. Now when I change the tube amp’s volume, the wet cab volume no longer follows it. That requires me to readjust the Matrix volume to once again achieve unity volume.
This is a deal breaker for me. Any idea why this happening and if there’s a way to make it behave more similar to the Suhr Line Out box?
The power station’s line out will produce a signal proportional to your head’s output volume. That should feed your stereo FX unit.
The problem I think, is that you are using the PS-100 for your dry signal; this is an entirely separate amplifier. So you have an extra volume control to adjust now.
Once you set the volume to the way you like and the whole rig sounds good. What happens when you turn your amp down? Do you find that the wet signals reduce faster than the dry? Is that the issue?
If I have not understood, please sketch (by all means, badly) a rig connection diagram.