The BC/OC product line is known for its quality tweeters and midwoofers. Designed in Denmark by our experienced team of audio engineers, Peerless BC/OC products can meet the most demanding needs for both volume and audio excellence. The BC/OC product line has ferrofluid in the magnet gap for improved cooling of the driver. Driver Highlights: Compact faceplate with sealing gasket which helps in reducing vibration between baffle and driver; cooling fan for improved power handling; coated textile dome for improved performance.