Duke LeJune lauded design emphasizing timbre, dynamics and efficiency. adjustable bass porting assures easy placement for virtually any room. Crossover matches horn and woofer for a seemless transition. Internal wiring and capacitor upgrades further improve clarity/transparency. They are 7 yrs old and show only minor blemishes not visible from seating position. These are excellent for music and HT, I used them with no center channel with great results.