DD-12 Vs. DD-15

While I am sure that the DD-15 is, indeed, more than up to just about any job, I would just add that the DD-12 that I have in my system is also quite the overachiever. My room is not huge, but it does have significant bass-suck issues, and the DD-12 corrected all of those for me, and is barely coasting along (compared to its capabilities).

Either would be a good choice, I'll wager.

If music is primary - go with the 12 or a pair of 12's. It will be faster and you will not lose much, if anything for movies.

Provided both are well designed, a 12" would not be "faster" than a 15". The Velodyne DD-18 and the Bag End S18E, for example, are as fast as they need to be to keep up with any speaker, even Quads.