Would Martin Logan Spires benefit from subwoofer?

Nice big room. I would say a well set up sub configuration will benefit even big speakers. I know many, many owners of Wilson X1s, X2s who use subs...probably which are cut off at 35hz or so...but there is a surprising increase in heft, slam and atmosphere that results.

I am a bass freak...but not bass, bass all over the place...but i just enjoy (even at low levels) feeling the quick tight punch of a drum bass thwack. I have a Velodyne DD18...cut off above 40hz...and it works beautifully.

takes a while to setup 'perfectly'...but its worth it. I also found an Auralex subwoofer isolation platform (60 bucks) helped incredibly!!! Good luck and pls keep us posted.

While the Spires really improved on the Panel/Woofer integration, adding a sub will help. IMO I like Servo Based Subs with stats. But the biggest thing that will help out with the Sub and integration is the DSpeaker Anti-Mode 8033 Sub EQ system. I messed around with a Velodyne SMS-1 (same thing that is in the Velodyne DD series) and measures, tweaked, auto measures, manual measured, tweak, changed settings...FOREVER and really could not get my sub to sound as good as I thought it could (I have my room EXTENSIVELY treated for acoustics). I finally bought the DSpeaker and within 15 minutes of unpacking hooking up and running the calibration, I had the BEST SUB response EVER in my room. Selling the SMS-1 was a no-brainer.

Thanks for two great replies, folks! I'll be experimenting shortly and will post results.