Bose 9 pin to 9pin audio input cable. * Brand new in original package * part # 302580-1001 * connects the subwoofer to the media center unit in Lifestyle series systems * Bose PS28 III subwoofer to media center AV18 and MC 1; Bose PS38 III subwoofer to media center AV38 and MC 1; Bose PS48 III subwoofer to media center AV48 and MC 1; For Lifestyle Systems Series III, IV, T, & V35/v25/135