Black oak cabinet, 10' driver in an a-periodic chamber design ! Butytl surround on woofer sweep tested 30 hz. up all ok, Inspected circuit board re-soldered few spots where required. Chemically cleaned controls for Level, Frequency and phase, also all RCA connections. This unit has both RCA & speaker level inputs, and High Pass RCA and speaker outputs. We added additional fiberglass & Dacron damping for improved deep bass. Excellent performance and adjustable design features. #9 condition