You bias just like any other amp....Going by memory here but...Pull the bottom panel off to get to the bias trim pots..Should be a hole on each side of the amp through the PCB...bias one side...rinse and repeat on the other side. If your using a bias rite or similar...I used to just put the amp up on it's side, Bias one side at a time and make sure you have a speaker cab hooked up at the proper ohm's setting. Leave the side not being biased on standby. Or if you have a 4 head bias right...do them both at the same time if you have 2 cabinets so that each side of the amp has a load on it...Hope this helps
