It would be handy. I just brought my gp12smx250 in for a complete rehab. It was functional but most of the board connections were loose or out of spec. In the course of repairs, the DI out turns out to be unbalanced. really bad design. its an xlr out, with pin 1 hot, pin 2 ground and pin 3 is open, nothing on it. Hums bad. I had a 1/4 in TS jack out added so that I can take the line out to a DI box to convert it to balanced. The thing that gets me is that there are about 50 different variations of that circuit depending on which year it was produced. My build date on that amp is 12/11/94. Im assuming that its one of the first variations of the SMX series heads. Ive seen a 95 that had the proper balanced DI out and was stereo with the biamping out and etc. of the other gp12 smx series amps. I also have an AH400 gp 7sm that I use. (yeah, I play with two trace elliots
That has none of the compression, crossover etc of the smx. I believe the build date is 92 or 91 on that.
So.....A definitive list of what amps with what features were produced during what years would be helpful as hell. That way my tech could get the right schematics. For instance what years were the series 6 produced, what years were features changed, What years were the SMX series produced, what features were added and removed.