Nat. I'm currently running 1 EP600, 2 EP500s and an Ultra in a quad setup. I've never had a problem with auto-start. The most important thing is to calibrate them properly. Also keep in mind the Axiom subs DSP chips react differently to single tone sine waves than analog subs when calibrating. For example some people report sudden surges in volume with slight changes in sub gain. It's easier to calibrate by raising gain above calibration reference then lowering sub gain at the processor/receiver to reference levels.

John