8'' long Throw Woofer - 4-8 Ohm Impedance.1'' High Temperature Voice Coil - Vented Design for High Power and Deep Bass Response.1'' Titanium Dome Tweeter - Cut-Out Dimensions: 8.84''(W) x 13''(H) x 4''(D).400 Watts Rated Peak Power - Sold as One Pair.Frequency Response: 50Hz ? 20 KHz The Pyle Pro PDIW87 two-way in-wall speaker system delivers stereo sound to any room in your home or office without cluttering floor space. Each unit in the pair features an 8” long throw woofer, equipped with a 1” high temperature voice coil and 1” titanium dome tweeter for a full, rich sound. These speakers pump out up to 400 watts max! The vented design for high power and deep bass response delivers a frequency response of 50 Hz to 20 kHz. Sold as a pair.