Dealers are just getting their display 2.4s in the showrooms. The pair I listened to this weekend was received last week and had ~60hours on them. I thought they sounded very good considering this, but overall they sounded somewhat constrained across the board and obviously require more break in. I listened to the 2.4s in two different setups. Neither setup used cables worth noting. The first setup had a Cary 303/200 CD player, CJ PV14L pre, and CJ 2250 amp. The second setup had a Classe Omega SACD-1 CD/SAC player, Classe CP65 pre, and Classe CAM-350 amps. Having owned the Thiel CS7.2s in the past the sound was immediately familiar. Clear, transparent, precise, and very coherent. The CS2.4 is less analytical and sharp sounding, and seems to have a more even tonality top to bottom. Bass quality is excellent. With the CJ setup the bass was a little less present, deep, and pitch delineated. To me this indicates that the CS2.4 favors a more powerful amp, such as the CAM-350s. It has been a few years since I listened to the CS2.3s, but my impression is that the CS2.4s sound fuller and have more midrange presence. I always thought the CS2.3s were on the lean side.