sorry, but i dont really know. i just set my speakers to small (x-over is at 90hz on my receiver) and let the sub handle the rest. for movies, this works out great. but i turn down the bass for music. the m22s have very tight bass when i set them as large, though its extention isnt very low (rated to 40hz) and isnt very punchy. if you dont really listen to music that is bass-centered, then i would recommend putting the x-over at or around 40 because the m22s do handle stuff up to there fairly well. if you do listen to stuff like techno or rap, then i would just leave the m22s as small and let the sub take care of the thumping.
hopes this helps
note: im using a sawm40 w/ polyfil. i plan on getting an hsu vtf-3 or an svs of similar price/performance as soon as some kind person does a good, non-biased reviews
Robertto, Thought I'd add my observations since I had similar questions with my setup and spent a lot of time on it. I keep my amp on large, perhaps since I don't have great subs (dual KLH 10") but the M22's seem to handle all the program material without breaking a sweat. This allows me to keep the sub's crossover lower, around 60 hertz. I keep the gain control on the subs a little higher than I need, so for most material I have my amp's sub control around -3.5db. This way, I can turn the sub up if needed, and to compensate for volume, without having to touch the subs. This works well for me. Sounds great. If I had an adjustable x-over point on my amp, I would probably also set it at 40 htz, unless I had a really good sub, then I would experiment slightly higher as well.
Well, I'm not a big techo fan, that stuff can REALLY test the limits of a speaker, especially in the low end. I got my M22's two weeks ago, and I love them. They seem to sound better every day. But I listen mostly to rock/pop, jazz, and HT. Been buying A-DVD's all weekend, which sound tremendous! I'll be replacing my rears with Axiom soon, I have been won over by their detail, clarity, forward sound stage, and transparent sounding high-end. Curious, Robertto, how do you like them for Techno/Dance-type music?
Won't for about another 2hrs when i get home. Most techno I listen to really isn't techno, more jazz/funk Jamirique(sp), Moby Lenny have some pretty deep low. My base when adjusted to the proper level should handle that stuff fine. First I am going to test the speakers set to small then maybe large.