Aurum Cantus AC165/50CK 6-1/2 Midwoofer 8 ohm Pair. Like new condition. These were purchased from Parts express for a project that I never completed. They show very minimal signs of use. The metal mounting ring has some small scuffs. Handled very carefully and perform as new. Description from the manufactureOverviewThe Aurum Cantus AC165/50CK 6-1/2 midwoofer employs a large diameter voice coil, a non-woven carbon fiber/Kevlar composite cone, and a high-strength ceramic ferite magnet. The tailored response of the speakers exotic yet supremely engineered cone selection delivers the signature Aurum Cantus combination of depth, accuracy, and listenability. A copper-plated flat aluminum wire voice coil provides high efficiency and excellent power handling, complemented by a low-distortion magnet system and precisely cast aluminum alloy basket. Aurum Cantus woofers are characterized by fast transient response, minimal tonal coloration, and deep, dynamic bass.HighlightsNon-woven carbon fiber/Kevlar composite coneLarge 2 diameter copper-clad aluminum flat wire voice coil maximizes dynamic rangeRound cast aluminum alloy frame is strong; easy to flush mount