All original drivers; sweep tested OK. Woofers cleaned and treated. Audio Pro modified crossover rev.6A - nearfield / midfield. Audiophile upgraded parts; 2nd order high frequency filter and low frequency circuit, special phase corrector, felt cone dampeners on woofers, & felt Carlson damping blanket. Vince owns a pair of these himself, and considers them one of the best small box speakers of all time (of a 6 inch woofer design modified to go down to 35 -40 cycles) Condition #9 some slight dust and dirt on top edge of grills