Martin Logan Aerius with subwoofer ?????

If you want to do a sub get a Rel, Their beautiful matches. Also don't let anyone tell you that you can't mate a ML with a sub, what do you think they use right now for bass? Its a panel with a (SUB)woofer in the same cabinet

I wanted a little more deep bass than the Aerius provides, too. While not a current model or as powerful as some larger subs, a Velodyne F1000 occasionally puts a smile on my face at it fills in that some of that deeper bass the Aerius lack.

I have Aerius I, the "sub" tbone refers too rolls off at 40hz and is also DESIGNED to blend with the panel. Not exactly what I would call a sub by any means. Any way I have not been able to match a sub well with mine but I have not tried anything much beyond the $750.00 mark. Maybe something of higher grade will keep up with them better but some times less is better.

I'm not sure how this will work since your speaker already has a "sub", of sorts. I'm going to go with a REL (Strata or Storm, maybe two) with my full range CLS's and still think it will be a tough match (i.e will the REL keep up with the speed of the CLS's, will the additional low frequency come at the expense of transparency ((I already know that the answer to this is "yes", but don't know how much I'll lose)). I'm not sure how a sub will match both your esl panel AND your dynamic woofer. Seems like there's going to a lot going on there. You have a very small panel as is (and there is a direct correlation between panel size and sound with Logans) so I wonder what the net effect will be. I've heard great things about REL -- the only way to go with esl's -- but you may be better off with a bigger Logan. REL's don't come cheap. Why not upgrade to a bigger panel and bigger woofer? SL3 or Ascent? Your net cost might be about the same with better results.

Try Velodyne HGS-10. Crossover @ 8oHz. Keep the sub volume down. Will be very smooth.