This listing is for a JBL 12" subwoofer, P/N WFR-12GG01. It was removed from a JBL Powerbass PB12 powered sub. 

 It has been tested with music, a 30Hz test tone & a multi meter. It is in very good working condition. Subwoofer is in very good cosmetic condition except for a scuffed area on the cone (see picture # 2). DCR = 5.2. I would consider this a 6 ohm impedance.