Tinkered on a bi-amp rig
Was in a semi-creative mood. Tried with just the OB1-500 heads, but I was not very happy with the results.
I am using the RPM as the dirty, the RBI as the clean channel. Each goes to a dedicated OB1-500. Both OB1-500 amps are set to "clean". The RPM and RBI receive their signals from a Palmer GA-03 Y-splitter from the pedal board.
I sidechained the clean, unaffected signals from the RBI and RPM to the DBX266XL. The RPM/RBI out signals of both go through the individual channels on the DBX. Each channel out on the DBX goes to an OB1.
I am running the compressors for each channel at 2:1...I tried it "Off" (since I already have one on my board), but it sounds better when engaged.
Clean is at the bottom of each section
Dirty is at the top of each section.
Cabs are rated each at 800 watts (AES) and 8 ohms. Each OB1-500 will deliver around 350Watt at 8 Ohms
There will still be a slight hiss at elevated volumes. But the gate takes care of this for the most part. I can live with that.
Definitely wall-shaking.