4 Full Range Drivers: 2.75", 2 High Frequency Soft Dome Neodymium Tweeters: 0.75", Balanced Dual Port Enclosure with Bass-Reflex * Frequency Response: 80Hz to 20kHz, New Integrated Class-D Digital Amplifiers, CONEQ Sound Enhancement * Acoustic Power Equalization for clear sound, 3D sound, Surround Sound, Hearing Aid, Auto-Volume, and Auto Bass Mode * Nite Mode: the late night listening mode raises whispers so they can beheard and lowers the volume of special effects and commercials * Features: Bluetooth Wireless with Apt-X, Analog RCA L/R Input, Analog Mini 1/8" Stereo Input, Optical Digital Input (SPDIF), Coaxial Digital Input, Subwoofer Variable Output: RCAx1, 2Vpp