Thank you for the quick reply. The speaker I am considering is a wireless Aucoustic Research AW811. The transmitter has a single pin audio in connection. The techies at Acoustic Research had no wireless speakers compatible with the aux connection on my Beosystem 2500 and offered no suggestions for adaptation. Spoke to technical service rep at Parts Express, on line store, and he had no products compatible nor could he suggest an adapter. My prior Recoton Wireless transmitter had RCA connectors to the transmitter and worked well for years.