Roger Sanders, the electrostatic speaker designer who was the subject of a Rendezvous article in our pages a little over a year ago, was back with his new model 10b electrostat/dynamic hybrids. They were driven by Sanders' own electronics. Only the source, a Tascam flash memory recorder, was not his own. Panel speakers are not noted for great depth, of course, whatever their technology, but the 10b's put up a superb, stable image, and the music was fast and detailed, as well as natural.