This efficient horn design is the handy work of Duke LeJune known for his excellent crossover design that make a seamless blend of the horn and the woofer enhanced by a rear firing tweeter. A trapezoidal cabinet with adjustable bass ports make placement simple. I've had them 5 yrs. and these make music. Dynamic and bass into the low 30's, options include upgraded internal wiring (VenHaus) and Mundorf silver caps in the critical signal path areas. These are a match in heaven for tubes. Under priced. I have no boxes therefore no ship. I'm in the Greenville S.C. area. I am willing to meet at a reasonable distance for delivery.