raanan said:
I have just tried adding Sequerra T9s with great results.Oddly,there seems to be more bass too.The CLSs were not open enough in a heavily carpeted room,but removing the carpets screwed up th room acoustics.
There are several reasons for the issue of "
CLSs not being opened enough" and one should not jump to blame the CLS just yet...
- Given that the CLS presents a tough load, specifically, dropping down to 1 ohm around the 20kHz region, the problem could be at the amplifier end running out of steam at the higher frequency range. The typical characteristic of full-range panels having a wide impedance swing really put quite a bit of stress on the amplifier. The resulting sound from this combination is really dependent on the amplifier's implementation.
- The panels are getting older, losing the (taut) resonsiveness to handle high-freqencies the way they used to.
- Your room is overly damped, absorbing the high-frequencies.
- Last but not least, you have a preference for lively top-end.
The first step to sorting things out is to borrow (or loan) a good, reputable amplifier with the sound characteristic of your preference and try it out in your room. This exercise will give you indications whether the problem is at the amplifier side or on the speaker/room side. If everything improves with the different (new) amplifier, then it's the amplification side of the equation that you need to focus on. Otherwise, you can eliminate the amplifier issue and focus on the speaker and room.
Examine your speaker panels closely to try and determine whether the panels need replacement. Call ML and give them the serial numbers to determine whether the panels are old and need replacements. While talking to ML, you can also ask them about whether there are maintenance (or replacement) to be done on the electronics of the CLS as well. Other knowledgeable members here can give you tips on how to inspect your speakers to ensure they are in good shape.
Once you can determine that speakers are in decent shape, the problem could be the interaction between the speakers and room. You'll want to play with placements and room arrangement to see whether things improve.
Last but not least, you may have a preference for lively top-end where the coherency of the full-range panels does not match with your taste

This may seem like an easy one to identify by going around to listen to a bunch of speakers to see the characteristics which appeal to you, but then you'll need to make sure that you give the CLS with proper electronics and set-up a fair chance as well. The later one is very hard to come by
Good luck
Spike