. FOSI Audio BL20A Bluetooth 100W Mini HiFi Sound Power Amplifier TPA3116 2.0CH Power Amplifier Audio Class D Amp Bass Treble With U-Disk Remote Control for Passive Speakers Description Fosi Audio BL20A is a powerful Bluetooth 5.0 HiFi stereo amplifier with AUX pre-output, which can be used as a pre-amplifier. Its design includes Treble & Bass controls as well as a remote control to meet your needs. The BL20A power amplifier supports AUX/U-Disk/Bluetooth input, suitable for most home passive speakers. It uses two low- distortion TPA3116 high- performance chips to deliver ultra- high-definition sound quality. Let's join the audiophile’s music journey with Fosi Audio BL20A Amp! Specifications: Model: BL20A Power amplifier chip: TPA3116*2 DC Input Range: 12-24V Terminating Impedance: 2 Ohm - 8 Ohm MAX Power Output: 100W x 2 THD ? 0.001% Frequency Range: 15Hz - 20kHz (±1 dB) SNR ? 92dB Input Sensitivity ? 500mV Input Mode: Bluetooth,AUX, U-disk U-Disk Capacity: MAX 32GB Output Interface: Speaker’s Output + 3.5MM AUX Pre-out Output: Passive Speakers + Powered Speakers, Amplifier Support Format: MP3/WMA/APE/ FLAC/WAV Bluetooth version: Bluetooth 5.0 (up to 50m without obstruction)