Edifier Speaker, very good sound! The R1700BT is a powerful speaker set with a sleek design, producing 66W RMS with its 4-inch bass drivers and 19mm tweeter drivers. A front-facing bass reflex port emphasizes lower frequencies, resulting in much richer bass. The modern R1700BT also features Digital Signal Processing (DSP) and Dynamic Range Control (DRC) to prevent sound distortion. Even at the highest volumes, they produce a very clear and clean sound. Audio sources can be connected via Bluetooth and the dual RCA audio inputs. Volume, bass, and treble can be adjusted using the buttons on the side of the active speaker. Active desk/bookshelf speakers with 66W RMS power - Bluetooth audio support - Two stereo RCA inputs for multiple audio sources - Convenient volume, bass, and treble controls on the side of the active speaker - Class-D amplifier with Digital Sound Processing (DSP) and - Dynamic Range Control (DRC) - Calibrated bass reflex port on the front - Magnetically shielded speaker drivers - 100% MDF wooden cabinet Edifier R1700BT, Studio, 2-way, Tabletop/Bookshelf, Built-in, 10.2cm (4"), 66W Speaker Placement: Tabletop/Bookshelf Number of Drivers: 4 Tweeter: Yes Treble Diameter: 1.9 cm Woofer: Yes Woofer Diameter: 11.6 cm Audio: Speaker RMS Power: 15 W Impedance: 6 Ohms Signal-to-Noise Ratio: 85 dB Total Harmonic Distortion (THD): 0.5 percent Input Sensitivity: 550 mV Performance: Product Color: Brown Recommended Use: Universal Bass Level Control: Yes Treble Adjustment: Yes Ports & Interfaces: Connectivity Technology: Wired & Wireless Bluetooth: Yes Audio RCA Inputs: 2 Power: Power Source: AC Weight & Dimensions: Width: 155 mm Depth: 212 mm Height: 250 mm Weight: 6.6 kg Package Contents Included cables: Audio (3.5 mm), RCA Interlink 2,5m Shipped carefully