BEST SUB FOR HT:MUSIC 50-50 with CM9/CMC2/CM5

That room will probably be very, very tough for deep bass; smallish and square. Whichever sub you choose, you might want to think about digital room EQ (included with the Velodyne DD series).

Good Luck

Marty

Do you have a budget?

SVS make awesome subs, even the drivers are built in house.

I have the same speakers I have a Martin Logan depth i. But I will be trying the supercube 4000 in a week. I will tell you the winner after I try both.

Without a budget and the word, "best," in your question these AGone links should provide a quick variety of size, price, and features, that may suit your needs. Happy shopping.

http://app.audiogon.com/listings?search_text=velodyne%20&page=1&no_listing_types_auctions=false&no_listing_types_classifieds=false&items_per_page=50&location_filter_radius=25&filter_category_id%5B%5D=30&min_condition=1&max_condition=11&listing_types_auctions=1&listing_types_classifieds=1

http://app.audiogon.com/listings?search_text=JL%20audio&page=1&no_listing_types_auctions=false&no_listing_types_classifieds=false&items_per_page=50&location_filter_radius=25&filter_category_id