Fix Amp Switching for Mesa Boogie Amps to Support 4 Cable Method
Appears an outboard DIY relay is need to make this work, see thread for discussion: http://line6.com/support/topic/16178-helix-4cm-amp-switch-mesa-v25-and-mesa-mini-rect-not-working/. Amp switching should be support for ubiquitous pro-level amps such as Mesa Boogie and other related.