which sub to get

I just purchased a SVS SB13 Ultra and it adds to my musical enjoyment.

Some of these comments are just canned responses that probably don't apply here. OP specifically says it's for near-field listening in a small room, so I would think that he should be able to get good results from 1 sub.

I think there's a great case to be made for multiple subs, but in MOST rooms, especially if mostly near field listening, you really can easily get away with one...if it's a well designed sub like REL makes. "Aural cues" that determine soundstage accuracy aren't in the bass domain really, and note that a REL sub when utilizing the "high level" signal from the power amp won't relieve the main amp's task, but will certainly SEEM like it is. I have skinny tower speakers with a front firing REL behind one speaker and it loads my large-ish room just fine...a lucky acoustic profile in this room helps everything, and I do have to adjust the sub level here and there.

WOLF_garcia wrote " I do have to adjust the sub level here and there." I totally agree. It is absolutely important to
to set volume precisely. Most audiophiles set volume too
high, presumably because they want to hear strong, powerful bass all the time. A properly adjusted sub do not call attention to itself all the time; only when the music demands it.

Every REL sub I have heard has sounded very nice. A Revel b15 is a heck of a sub AND with its built-in EQ should be able to integrate well.