The V4 is running though the bottom cabs and the Roadster the tops. I amp using this as a stereo rig(through the PA) and the V4 as a Synth/Keys amp as well. The V4 is a guitar amp. I used this amp as my very first modification Guinea pig. I installed a grounded ac cord and a master volume pot in the rear slave out hole. Not too difficult. It SCREAMS like a Marshall on steroids with big beefy 7027A tone! The Ampeg cabs are (from left to right) all original JBL 12's and X-pattern Mesa 70Watt V30's and Celestion GT75's. All 8 ohms. The synths sound HUGE and it's easier to set up than running a direct box. We just lug the cabs in, hook them up and the sound guy has two mics to worry about.
I think the Recto cabs would be too wide for the Fridges but It would be nice to have the towel rack and kick plate. We call the V4 cabs the "Ankle Breakers". No casters, taller than usual and chrome corners! Ouch!