Hey folks- Yet another amp question. Due to my location in the theatre orchestra pit, I'm having a hard time hearing myself over the trombones and keyboards. I'm thinking of bringing in my Workingman's 12 to use as monitor. I'd like to still use the volume control on it, so what would be the way to hook it up to my Landmark 300? The landmark has pre-amp out, do I run a patch cable from that to the input on the Workingman's 12, or to the effects return on the Workingman's pro? Thanks!