Matching speaker : T35A is really useable from 4kHz according to E-V (if not to say 5 or 6kHz). First you have to determine if you go for a 2 or 3-way system, and then to choose a speaker. My advice : if you wish to keep the E-V "spirit" try to find the E-V midrange kit (1824M driver + 8HD horn) and a good E-V 12" (EVM12) or 15" (EVM15). Compute the crossover by yourself and adjust time alignment. This will be a real high efficiency system that will work amazingly well. If you prefer something easier to set up, try a full range FOSTEX like the FE208A. 2-way without mess. But there is many other satisfying speakers on the market. Horn direction : The T35A horn is of diffraction type and normally should be used vertically according E-V principles, giving a better horizontal dispersion. KLIPSCH preferred to mount it horizontally. Probably for easier mounting and because it doesn't matter with domestic use. So don't worry and do according your taste. Best regards, ERIC