Hi there,

I’m looking to put a Paramix circuit in between a preamp and a cab sim in one box, so it will go pre amp->paramix->cab sim.  Essentially, I’d like the paramix to act like an FX loop in an amp, with a wet/dry blend.  I will be using three different 3PDT switches with true bypass on each circuit inside the box.   I’ve never put 3 circuits in a box before, and I’d like some advice on the paramix offboard wiring specifically related to grounding and not creating a ground loop.  I can see where input/output “tip” signals should go so all good there.  However, in the Paramix build doc it looks like there are extra ground pads from both the “In” and “Out” sections of the PCB that are grounded to the sleeve of the jacks, in addition to the main ground pad next to the +9V.  In my build, the Paramix circuit and bypass switch won’t be connected to an input and output jack, as it will be sandwiched between two other circuits.

My goal for the 3 circuits is to star ground everything to the DC jack sleeve via the main input jack of the pedal.    So circuit 1 (preamp) will be grounded via it’s PCB ground pad and the input jack and circuits 2 and 3 would share those grounds according to Madbean’s dual circuit wiring except with an extra circuit in the middle.  I’m fine with keeping the specified Paramix build doc bypass switch wiring the same, fwiw.  I just need to know where to connect the ground from circuit 1 (preamp) to which pad/location in the Paramix wiring scheme, and which location to take a ground from Paramix’s circuit to circuit 3 (the cab sim) without creating a ground loop.   Can I bring the ground from circuit 1 to the Paramix “Ground” pad, connect the ground from the Paramix “In” dual pad to the Paramix’s 3PDT bypass switch, and then take a ground from Paramix’s “Out” dual pad to circuit 3?   How do the ground pads that are part of the dual pads for “In” and “Out” relate to the overall “Ground” pad in the power section for the Paramix PCB?

Thanks!

• Dan