Just bumping this thread as I have the same problem. Trying to run 2 amps in the 7 cable method. I guess its a routing error by me but I cannot figure out what I´m doing wrong. I cannot get signal from send 2 of the HX to the input on amp 2. Amp 2 ends up being slaved via output 2 on the HX to the fx return on amp 2. In other words, the preamp on amp 2 to ends up not being used...
Thx
Vidar