Edifier R1380DB-BR Features ÔÇó All wooden enclosure minimizes acoustic resonance ÔÇó 1-inch(25mm) tweeter and 4-inch(116mm) mid-bass driver ÔÇó Class-D amplifier with 42W RMS total power output ÔÇó TI PCM9211 digital decoding chip for precise audio processing ÔÇó Versatile connectivity: Optical, Coaxial, Line In, and Bluetooth inputs ÔÇó Bluetooth V5.1 with Qualcomm?« aptXÔäó ÔÇó Side panel controls and remote control for easy operation Specifications Bluetooth version V5.1 Audio codecs APTX, SBC Power output (RMS) 21W+21W Frequency response 55Hz-20KHz Audio inputs Optical, Coaxial, Line In, Bluetooth Input sensitivity Line In1: 450??50mV Line In2: 550??50mV Optical/Coaxial: 450??50mFFs Bluetooth: 700??50mFFs Signal-noise ratio ÔëÑ85dB(A) Noise level Ôëñ35dB(A)