Small footprint subwoofer

A small REL, and not a pair, will be enough. If you need to locate it away from your other components, get the Arrow wireless connection. T5x or Tzero Mk III should be enough. Alterntively, the KEF Kube 8 MIE or KC62 might work. The KC62 would be the most expensive of the lot.

highend64

A small REL or Sunfire subwoofer will be enough. Keep me posted on your purchase decision.

Happy Listening!

I would heartily recommend the Martin-Logan Dynamo 800X subwoofer. $900 retail currently.  Sub is 13.7”x12.4”x13.1”. Full app control plus a useful ARC DSP app that can use your phone as a microphone. I use a pair of these to extend the response of my Bowers and Wilkins 805D4. The ML app makes it easy to tweak the settings from your listening seat. Both speaker and line level inputs.  Don’t believe me however, read Larry Greenhill’s review in Stereophile on his successful experience integrating these with a pair of Quad electrostats. 

highend64    'As far as the position of the Hsu sub, yes it is in a near null position by not quite. That is why it is off centered to compensate the difference. I have the tools to do measurements so finding the best place for the sub is not a problem.'

Just curious. Is this the room location the Rational software calculated or just an interim compensation?

All the best with your situation. Take care.

The KC62, SVS 3000 Micro, and REL T5x are all excellent mini-subs. I would add the Sunfire - which I have - but they're gone. In your small room I expect the KEF would work best, but if budget is a determining factor, then the T5/X. The SVS offers better control via their app, and while not as sophisticated as the KEF, certainly offers incremental value over the REL.