Bluetooth Amplifier Board, ZK-HT21 2.1 Channel 160W x 2+220W Subwoofer Amp Stereo Mini Audio Power Amplifier Module TDA7498E HiFi Chips,BT USB AUX Input DC 15-36V for DIY Home Speakers

[ 2.1 CH Subwoofer Audio Amplifier Board] This ZK-HT21 power amplifier is 2.1 channel, letting you connect 2 passive speakers and drive a subwoofer. It comes with Treble and Bass buttons, independent subwoofer volume adjustment buttons, and 20-200Hz subwoofer frequency adjustment buttons, which is very friendly for audiophiles. You can adjust the Treble and Bass buttons to make the bass more shocking and the treble clearer, making the sound more layered. [160W*2 + 220W High Power Output] This HT21 audio amplifier has 160W*2 output power for the left and right channels and 220W output power for the subwoofer.

It can drive two high-power speakers (30-200W, 4-8 ohms) and one subwoofer (30-220W), and the adapted power supply is DC15-36V/8A or above.
Note: The higher the power supply voltage/current, the higher the output power; the lower the speaker resistance, the higher the output power. The adapted power supply should be higher than the actual working power of the amplifier. [HIFI Stereo Audio Power Amplifier] The ZK-HT21 power amplifier board has two built-in TPA7498E power amplifier chips. TPA7498E is a high-performance class D power amplifier chip that can make the device maintain ultra-low distortion in the whole audio frequency band while showing high-definition sound quality. The wiring around the chip is a window tin spraying design to increase the output power. 4 x low noise preamplifiers 5532 group can improve the sound quality and volume, and increase the gain. [Multiple Audio Input Modes] This mini amplifier receiver has built-in Bluetooth 5.0, USB flash disk, USB sound card, and 3.5 mm AUX Input. In Bluetooth 5.0 mode, it offers faster transmission speed, lossless decoding, and a lower distortion rate; the connection distance to audio equipment is 15m/49ft.
Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected. [With Protective Function] This Bluetooth amp module is designed with multiple protection mechanisms, including over-voltage protection, under-voltage protection, over-heat protection, and short-circuit protection, with a case to protect it. Besides, there is a long-life ultra silent fan (locked rotor, no burning, no noise) above the audio chips, for heat dissipation and protection of the Bluetooth amplifier board