Today and tomorrow I am swamped with meetings. But I want to get the word out for all those who may be considering 125s.

I have them in 2.2, music only, in a 1920 cu ft living room in conjunction with M2OW. The living room is open to the rest of the house. I have no bass management other than the bass control on my Chromecast Audio and bass control on my Pioneer. Each of them is being fed from the Pioneer pre-amp outs (left out to left sub and right out to right sub). I have them set to 80Hz cross-over which is just perfect for all Axiom on-walls.

They are tight, smooth, totally musical. They put my previous (cheap) subs to shame. One is a Yammie and the other is a Sony (that I heavily modified to make sound better). Links below.

Charles, one for my room would be no problem. Plenty of tight, clean power. I have each of them set to 4 on the dial and have the bass cut to my M2OW so as not to tax the mid-woofer. Bass management of course would be better but you know what? I don't need it. Everything that is well-recorded plays full but tight and controlled.

Damn, Victor Wooten sounds so awesome. Kraftwerk, Dan Fogelberg, Yazoo, Queen, Red Hot Chili Peppers...all full, tight, nice mid-bass and controlled lows even at volumes that I'd never play. The new subs have made a previously good presentation even better. Now it just sounds so much cleaner and tactile.

Screw M5s and EP500s. Just go M2s and 125s for music. LOL!

I plan on taking them downstairs and comparing with my dual 500s.

https://www.amazon.ca/Yamaha-Corporation-America-SW315-Subwoofer/dp/B00009W8XH

http://www.audioreview.com/product/speakers/subwoofers/sony/sa-wm40.html

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