The sound is absolutely breathtaking, detailed and smooth at the same time. It really lets you hear what is on the recording. If you play records with poor quality you will really hear it. The build quality is top notch. I believe that these speakers really need top quality source and amp, which almost forces you to upgrade the rest of your system.
Vocals are truly amazing.
The 11s are not afraid to extend deep and accurately through the lower octaves. Very impressive detail and resolution in the mid and high end. The 11s are bright and quick and a pleasure to listen to. Yes, my audiophile grade sound is actually coming from a home theatre set up. And Incidentally, the Concert 11s hold up quite well under the stresses of twisters, volcanos and explosions of my DVD collection.