Allison audio RM-160 rack connection

[hyde maintenance]

I recently picked up a few more Gain Brains and have decided to load up the Allison rack I've had kicking around forever.

I noticed that there was signal bleed and interaction between Gain Brains. When I checked it out I found that all of the low (pin 3 I guess) terminals are common both in and out.
I'm guessing this is the problem. Should I lift the 'low' pin and run them hot + ground?
Any other suggestions?

Thought I'd check here before digging around 'experimenting' for an hour or two (I seem to do enough of this already).

Thanks

[A.David.MacKinnon]

Is that the first generation Gain Brain? My 1st gen Gain Brains and Kepex's are unbalanced and only have audio connections for +, ground and key input. Make sure you (or the previous owner) haven't linked the key inputs on all the modules.

[hyde maintenance]

Yes these are the first ones.

I'm using the in and out only and haven't wired up the keys at all.

The molex diagram screened on the back of the PS rack shows a balanced connection- high, low, and ground, for each of the 3 connections (in, out, and key). I'm guessing there's no balancing circuitry in the rack itself so I'm not sure what this is all about.

I'm going to lift low and see if it clears it up.

[hyde maintenance]

Well no luck.

It seems to need both high and low to get signal, but this also gives cross talk. I've tried lifting each lead as well as switching their positions and then lifting them individually.

The closest thing to 'working' I get is lifting the low (cold) leads and bridging them (found this out by accident). The cross talk goes away but it makes the comp seem kind of funky.

I'm a little stumped.

[hyde maintenance]

Thanks to Doug Williams over on the prodigy board.

Low to ground in one spot.

Everything is gooood.