? BASS&TREBLE CONTROL— You can control the volume of the subwoofer via bass adjustment knob.The cutoff point for the bass is 180H.Treble adjustment knob only control the treble volume of the right&left channels. Gain adjustment range is -6dB to 6dB.
? CONNECT PASSIVE SUBWOOFER—Expect connecting the left and right channel,2.1 Channel Class D Amplifier also can connect passive subwoofer,mainly enhance the bass area and give audiophile more choices.There isn’t any affection for 2 channels when you connect the passive subwoofer.
? BLUETOOTH 4.0 FUNCTION—The stereo Bluetooth amplifier adopts high-quality Bluetooth chip CSR8635,you can connect the Bluetooth device within 10m barrier-free distance.The audio amplifier is compatible with all Bluetooth devices,such as smartphone,laptop,Bluetooth speaker and so on.
? CONNECT MULTIPLE AUDIO EQUIPMENT—Via BT,RCA and AUX 3.5mm input interface,the optical audio amplifier can connect many audio source devices,including mobile phone,TV,laptop and CD/DVD;You can connect passive subwoofer and passive speaker to output.
? HIGH-END CHIP—The audio power amplifier adopts high-end chips combination,such as teax amp IC (TPA3116),Bluetooth IC (CSR8635),op IC(NE5532) and STM8 MCU control.XL-2.1BL Class D amplifier synthesize better amplifier performance and improve cost performance;Package include:1 x XL-2.1BL;1x 24V 4A power supply?1x 3.5mm AUX cable;1x RCA cable?1 x 3dB Bluetooth antenna .