Soundlab speakers with sub woofers?

My Soundlab M1PX's driven by CAT JL3 monoblocks (150 watts/ch)have very musical, spectacular bass. No subwoofer needed here!

In fact, when auditioning CAT JL1 tube monoblocks (100 watt/ch.) several years ago against my Mark Levinson 350 watt/ch. ss amp, the CAT’s increased control and drive in the bass region was the immediate positive sonic attribute that I noticed. In that realm, the CAT's did an absolute sonic tap dance on the Levinson! After a few more minutes and absolute disbelief of what I was hearing, I realized that the CAT's enhanced not just the bass, but the entire audio spectrum including the sound floor, harmonics and the note's leading and trailing edges! The differences were so stark, that immediately upon firing up the CAT's, NO thought was given to keeping my Levinson.

Thus, at least with CAT (tubes) vs Levinson (ss), I couldn't agree more with Atmasphere's comments regarding tubes and Soundlabs.

Atmasphere: The right amp is what makes for bass on a Sound Lab. Generally speaking, transistors are not a good match.

In fact, I recently was able to hear Ralph's, Atma-sphere amps (MA1's and MA2's) with Soundlab's. The result was very impressive. I was at an audio dealer's, not my home, so I really couldn't compare Atma-sphere's sound with my CAT's. But what I heard was more similar than different, and sounded just wonderful; so, much so, that I wouldn't hesitate to use Atma-Sphere's (tubes) with my Soundlabs.

If you're thinking of trying/buying Soundlab's, being worried about needing a subwoofer, would be the least of my concerns. IMHO, Soundlab's electrostatic bass is a huge positive and simply must be heard.

While I have no need to reproduce movie sound effects in my 2-channel only room, the canon explosions on Telarc's 1812 Overture are reproduced tightly and with authority and bass riffs (electric and standup) are simply outstanding. I can't imagine needing more!

With that said, I 2nd., soliciting -- frequent Audiogon contributor -- Duke Lejeune's input. As a Soundlab dealer and audio speaker and instrument bass cabinet builder http://www.audiocircle.com/index.php?topic=125121.msg1319009#msg1319009, he is in a perfect positon to provide uniquely experienced advice.

Rleff: Hearing the MA1 and then the MA2 with Soundlab U1PX's was a real treat. As could be imagined, the overall sound was very, very similar. The MA2's had a little more gravitas -- i.e., control and thus, refinement. The difference was minimal & as such, wouldn't be noticed without A/B'ing them back to back. Would I have been able to blindly discern the difference? I really can't say, which to me, suggests how close they really were.

Of course the speakers were "PX's with the new consummate upgrade. Hence, they present a more benign load than they formerly did. I would imagine that the non-PX panel and previous generation toroidal transformer speakers would benefit more from the higher power MA2's.

If dollars weren't an issue & I hadn't heard the MA2's, I could be quite happy with the MA1's. I must admit however that the comparison wasn't lengthy, nor with overly complex material. If I had both amps in my system and had several days to compare, the differences may have been more pronounced, but then again maybe not.

Certainly with new Soundlab PX panels and backplate electronics, one needn't be concerned with the MA1's driving ability. Then and only then if that last few percentage points of refinement were appreciated & the extra funds and heat weren't a concern, then MA2's may be just the ticket....