CFS engineered the COXB to be everything you need in a midrange car audio speaker; delivering incredible sound, loudness, and reliability. The COXB10 coaxial utilizes a high performance ferrite motor, which is an extremely lightweight and powerful magnet, allowing this speaker to be installed in a wide array of applications. The high frequency section is a close spaced aluminum diaphragm assembly. The diaphragm is a 1” diaphragm that provides excellent high frequency response and superior power handling and durability. The horn loading is provided via a thru pole piece configuration The overall high frequency design provides very high sensitivity.