M2 Extra Go Juice

Anyone here know how to hot-rod an M2? I've seen mention of this as possible but nothing beyond that. The speaker build I'm doing is a little power hungry, 40w bare minimum.

I'm all setup to build a couple M2x, can I go "turbo?"
 
@Zen Mod, you came up with an awesome hack for an opamp negative rail about a year ago; this for an M2 battery power build I was doing.

If I can talk you into detailing how to turbo the M2 and bring it full circle, I'll owe you big time! Can you elaborate with the details?