TAD (division of Pioneer Electronics) is showing the Reference One, their latest ultra high-end loudspeakers. At $60,000/pr they’re certainly not for every home theater, but the sound was outstanding (warm, powerful, and detailed) and the cosmetics superb. Sound source here was open reel tape. Both the midrange cone and tweeter dome (made into a concentric driver) are made of beryllium. This one driver covers the entire range from 250 Hz to a staggering 100K Hz.