1" 200w Aluminum Phenolic Compression Driver.Multi-Way PAs, Stage Monitors, Side Fills.High Sensitivity, Smooth Response, Low Distortion.Kapton(TM) Bonded for increased power handling and durability."Phase Plug" optimizes Geometry reducing phase cancellation The D250-X from Selenium is highly recommeded for for mid range applications in Multi Way PA Systems, stage monitors, Side Fills and high SPL Car Stereo Systems. A precisely formed phenoic diaphragm produces high fidelity sound throughout the mid range and features high sensitivity, low distortion and smooth reponse. The voice coil is bonded to Kapton ™ using high temperature adhesives to increase durability and raise power handling. An acoustic transformer or "Phase Plug" with optimized geometry reduces phase cancellation.