How do I go about doing this? The instructions are confusing. I supposed I have three choices: 1. XLR out to power amp in 2. Effects send to power amp in 3. Slave out to power amp in Right now I have an XLR cable running from the preamp of my Mesa to the RMX 850. Yet somehow I don't have any sound. I turned the level up and still no sound. I was told this is the best way to do it by the guy at GC and can't figure it out, even with the dip switches set to what I believe is correct. I have channel 2 features set to off and 1-7 of the dip switches set to the right. This means I am bridged with parallel inputs on. The strange thing is that when I plug cab #1 into my Mesa head I get sound and the signal LEDs light up on the RMX. What type cable do I use to go from slave out to power amp? Shielded instrument cable or unshielded speaker cable? I'm completely lost guys.