The M3 and M5 Sapphire both being rated to 32Hz is correct. Since the 2 woofers are identical, there is an amplitude lift on the M3 (in parallel below 90Hz) over the single woofer of the M5, but the bass cutoff point is the same.
Clayton
I'm no techie, but have two somewhat technical questions:
1. On the M5s, when you say they go down to 32, does that mean they are more or less flat or that they roll off earlier? Not a trick or gotcha question, I don't understand how these things are measured in the speaker world. My little REL T1 subwoofer's only goes down that far, and I'll likely be selling or repurposing it, if the bass is deep and articulate in the M5s in my little 11 by 14 listening room. But I do like a firm foundation, esp. with rich orchestral pieces.
2. Does a small room like mine actually make 1 a moot point? In other words, even if the M5 goes flat to 32, the room couldn't reproduce it because of sheer physics. I've tried to read up on this, but get conflicting answers on how room size interacts with long waves of low frequency bass. Maybe I've never, ever heard 32 with my REL because my room dimensions forbid it? If so, the M5s won't be able to trick mother nature.
Thanks!