Edifier R1850DB Active 2.0 Bookshelf Speakers - Includes Bluetooth, Optical Inputs, Subwoofer Supported, Built-in Amplifier, Wireless Remote INPUTS – RCA/Aux, Optical/Coaxial, Bluetooth for convenience TREBLE/BASS CONTROL, SUB-LINE OUT - Adjust bass, treble, volume and toggle inputs on rear panel. WIRELESS REMOTE – Handy compact remote control for input selection, volume adjustment and track control for Bluetooth devices. The R1850DB is an active 2.0 bookshelf speaker system designed at a 10-degree angle to accurately direct sound to you in the luxurious MDF wooden enclosure geared to minimise acoustic resonance. The R1850DB comes with a fully featured remote for the set of bookshelf speakers. Adjust the volume, switch inputs, mute the speakers and control Bluetooth connected playback all from your fingertips. The medium-density fibreboard [MDF] enclosure reduces distortion and minimises acoustic resonance. The base of the speaker is angled at a 10-degree incline for dynamic precision and delivery. The design of the angle directs sound from the woofers right to your ears producing 70 watts of balanced quality tunes. FREQUENCY RESPONSE 60Hz-20KHz TOTAL POWER OUTPUT:RMS 16Wx2 + 19Wx2 SIGNAL TO NOISE RATIO:⩾85dBA TOTAL HARMONIC DISTORTION:0.5% INPUT SENSITIVITY:PC:700±50mV AUX: 550±50mV TWEETER: Φ19mm silk dome, 6ohm SUBWOOFER: 4'Φ116mm 6ohm