Note: This product is sold as a set of two speakers, one with attached stereo amplifier and Bluetooth receiver, the other a matching passive speaker. Features: Highly efficient Class D amplifier Bluetooth range: 32' Screw terminal power input and speaker output connections Screw terminals accept up to 16 AWG wire Specifications: Power output (amplifier): 15W RMS x 2CH Woofer: 6" woven fiber cone with rubber surround Tweeter: 1" titanium dome Frequency response: 80Hz ~ 20KHz Magnet weight: 8oz Power requirements: 12VDC/2A, power supply Model 28-19375 included. Dimensions: Overall frame diameter: 9" Required cutout: 7.75" Mounting depth: 2.9"