Mine are new from end of December and the bass took MANY, many hours of play to get to an effortless presence...but they did. The manual states 90 dB of play for 100 hours. That's a LOT of play at a high energy level.
But, these speakers really get under your skin after break-in with their truly realistic midrange timber and imaging. I just haven't heard anything that music doesn't seem to "come" from like these. The music is so fast and accurate every nuance is just "there". You never get the sense the speaker is "making" the music (of course, it is indeed doing the deed). But the phrase, "disappear into the room" is close to true with them.
I stuck mine on a digital radio at ~90 dB and left for work over several weeks. The radio's narrow dynamic range set me at easy to not overdrive the panels dynamically. The bass panels will cry for mercy first. Watch for light blue corona discharge as the bass panel gets near enough to the stator to start a electrostatic discharge. Same as your finger next to your sister’s ear after you rub your feet on the carpet, eventually there will be a POP. You'll hear, and see, a light POP sound. Pay attention to the general SPL level and musical type and simply try not to go there again (bass SPL wise). Some new digital recordings are pretty dynamic, and a bass session can be much more dynamic than off of a record, and suprise you. I have a few CD cuts that are pretty excessive in bass relative to other recordings. Add in the fact that the auto-level volume isn't too great, either.
Don't fret, the volume level is NOT where you will ever play music for long in a normal sized room. They get plenty loud. And, Roberto is right as rain, strings and any complex harmonically structured sounds are superb on CLX. As good as they are at their best sounds, they are darn near superb EVERYwhere they work. Sure, the deeper bass and mid range dynamic POW is better on dynamic drivers but hey, they don't get anywhere near a CLX for the price everywhere else, and THAT is a LOT of other places...realism, microdynamics, imaging, soundstage depth and width, openness around each instrument ETC.
I got USED to every other speaker I've owned but the CLX? Now this is a speaker I LOVE more and more!