[dyohn]

If you don't want to go big the DPL 10 works pretty well in a 1.5 cuft sealed enclosure fully stuffed with about 100 watts input. A quick Unibox model has it peaking at about 103dbSPL @ 45Hz with an fb of 35Hz and f3 of 28Hz. Should sound decent in room.

 

[dyohn]

I'd be very concerned with the high QTS at that point though. It will be a boomier sub. I think a parametric eq is a must for this sub.

Yes, Qts is a little over 1 with that small an alignment.

 

[dyohn]

Actually the DPL-10 in a 1.5cuft sealed enclosure is not all that boomy. Here's the Unibox prediction:

 

[dyohn]

For a HT sub there are better choices.

Oh absolutely! I was simply trying to let the OP know that if money is an object or if he's already obtained the driver how it could be used with decent results.