Theater Solutions Reference Series In-Ceiling and In-Wall Speakers, produce wonderfully full low end and clean crystal highs. We use modern technology of computer aided design to develop a speaker series that blends beautifully into any environment. All speakers have woven fiber bulletproof cone drivers for protection and bass. Silk titanium dome pivoting tweeters to direct sound at listeners. They also have 2nd order 12db per octave crossover for years of optimal performance.