With a dual voice coil 8” Polypropylene woofer and two .75” Silk Dome tweeters, the DS-180CSM brings dynamic, powerful, detailed sound to your distributed audio system - for true stereo sound in spaces where two speakers aren’t possible. Frequency Response 73Hz - 20kHz +/- 3dB, Dual .75" (1.9cm) Silk Dome Tweeters, 8" (20.32cm) Polypropylene Woofer, 94 dB @ 2.83V / 1m, 50W RMS, CUTOUT DIMENSIONS 9.8” (24.9cm), MOUNTING DEPTH 4.45” (11.3cm)