Based on the already excellent AC Series, the Aurum Cantus AC130/50CK 5-1/4" large diameter voice coil midwoofer offers a whole new index of performance attributes. The tailored response of the AC130/50CK's exotic yet supremely engineered non-woven carbon fiber/Kevlar composite cone 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.