I've given serious consideration to selling my D2 12 and purchasing a 15. At the moment, however, I would only be able to throw 460 watts rms at the thing. My 12 in a 2 cube box at 28 hz gets louder than I ever need it to with that many watts but will the 15 respond the similarly? I do plan on upgrading to a 1000 watt amp sometime in the future but it wouldn't be for at least another couple of months. I would probably put the 15 in a 2 -2.5 cubic ft sealed box, but space really isn't an issue. Any help at all would be greatly appreciated! Thanks! Mike