The PRV Audio D290Py-S 1" Pro Audio Compression Driver offers unsurpassed vocal and midrange reproduction A specially designed and easily replaceable Polyimide diaphragm on a Kapton former results in a more natural sound with smoother and more accurate high frequency reproduction This top of the line technology is ideally suited to many different types of applications: PRO Audio Line-arrays, high-end monitors, high output home audio speakers, Car Audio or PROAudioOnWheels Systems, for which performance is crucial. The D290Py-S is assembled with a standard 1 3/8” screw for easy replacement with current 1” screw-on horns Continuous Program Power (RMS): 180 Watts