Looking for a good small subwoofer...


A friend bought two smallish horn speakers, wants to beef up the bass with a pair of small subs, (preferably piano black) with built in amps and active crossovers to send line-level high-pass signal back to his EL84 class-A amp to the main  speakers.
These aren't going to get super loud, just fill in some low bass.

Any ideas?

Thanks,
Steve.

swann

I also have the mk10 speedwoofer . Paired with elac 2.0 unifed ub52 speakers  love the sound. 

Had a dynamo 800x from Martin Logan.  Did the job, sounded good and wasn’t huge. 

Love my REL t9x.  IMO can't go wrong with REL.  But, recently listened to a Kef kc62 and was very impressed.  Goes down low with no muddiness and is tiny!  Thinking of one for my living room.  Not cheap though.

I have an older Hsu sub in my system. They don't get much press here, but are well designed and easy to dial in. Very musical. The founder, an MIT grad, started the company engineering and building subs.