Another member's M2 system using Benchmark AHB2 amps:
https://www.audiosciencereview.com/f...s-w-subs.2369/
While not M2's the JBL 4722's I use have similar woofer tech and I drive them with Crown XLS 1502 DriveCore 2 Series amps:
https://www.crownaudio.com/en/products/xls-1502
There are a few models to choose from and can be bridged mono. If the fan has ever turned on, I can't hear it, even right up close to the amp. I am impressed with the sound quality, headroom and damping factor of these amps. The XLS 1502 puts out 575W into the 4 ohm load with the double 15" woofers per side. At extreme level's I can get the limiter to flash on drum transients, but adding another 1502 in bridged mode would be 1550W per channel.
I can't speak to the high frequency sound quality of the XLS amps, as I run the JBL 4722's biamp (
triamp with subs) and the amps are used to drive the bass cabs. Really impressed with the tight bass and impact. I upgraded the CD to JBL 2453H-SL and driving those with Nelson Pass flea watt
ACA amps directly connected to the CD's with a protection cap and no padding. Dead silent, no hiss, lovely SQ.
It would seem to me that a couple of bridged XLS 2502 with 1550W at 8 ohms per channel would give you plenty of headroom driving the M2 woofers. I have never heard the fan and if you check out Amazon reviews, the majority of folks are impressed with the SQ, especially at this price point
Good luck!