(Pair) Black, all original drivers sweep tested OK, Audio Pro modified Rev 6 AMF x-over design (audiophile quality parts), 2nd order hi freq filter design, 2nd woofer coil & bass filter, phase corrector circuit, carlson damping blanket, secured with RTV, also added felt cone dampeners to woofers, SN 118997 118996, A.P. Mod Rev 6A, condition #9