It would take a heck of a lot of power to relax those aluminum drivers \:\) .

Scott, if it makes you feel any better, I drove an M80/M60/M22/M3/mystery speaker (1.25 Ohms nominal) all in parallel today from my cheap Denon. It was for a brief 15 seconds at about 75dB but it did it. Since all of the speakers were mine, I didn't want to experiment for too long. But if they were all mine, I would have kept playing.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated