Used BMS 4594 ND compression drivers. 1.4" exit, coaxial. New diaphragms. Passive xo's included. Purchased with the intent of making a pair of Peter's DIY's, but running short on time and energy. Note, these are not the HE version, as Peter is using, but they sound fantastic nonetheless. $600/pair shipped within the USA. PM for shipping price to other parts of the planet.