The AMPEX 830 speaker 8" WOOFER DRIVER PAIR as pictured . They're pulled from Ampex model 830 cabinet , in very good sounding condition (tested) . Fabric surround, Alnico magnet , impedance = 4 Ohms , mounting hole to hole = 7 3/4" . Note : This selling is final ( no return or refund ) Please buy or bid accordingly. Thanks for looking.