I read with interest J. Valin's recent TAS review of the new Martin Logan CLX. I recently auditioned the speaker at length, and agree with his assessment on virtually every point. However, I have very fundamental problems with 1) a $20,000 speaker that does not reproduce the bottom 1 1/2 octaves in any way, shape, or form, and 2) is dynamically limited to the point of compressing peaks of most music playing at 'realistic' levels.
I do not wish to pick on the CLX in particular. Jonathan's review, however, extended the latter point to virtually all full range electrostatics. I find it interesting that the SoundLab M-1 has been on the TAS recommended list for several years, but that the single greatest improvement in SoundLabs has not been reviewed. I am speaking of the PX technology, which is implemented in all new SoundLab speakers and can be retrofitted to older models. I purchased the PX panels for my A-1s just over a year ago. Gone are any dynamic limitations up to ridiculous volume levels. Bass is now flat to 28 Hz in my (large and dedicated) listening room. I would urge Mr. Valin - and any others who wish to experience full range, uncompressed electrostatic sound - to give these a listen.