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

This 2.1 channel power amplifier allows you to connect two passive speakers and drive a subwoofer. It features treble and bass adjustment controls, independent subwoofer volume adjustment, and 20-200Hz subwoofer frequency adjustment, offering flexibility for audio enthusiasts to customize the sound for more powerful bass, clearer treble, and enhanced audio layering. This audio amplifier provides 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). The required power supply is DC 15-36V/8A or higher.

Note: Output power increases with higher power supply voltage/current and lower speaker resistance. The power supply should have a capacity higher than the amplifier's actual operating power. The power amplifier board utilizes two TPA7498E high-performance Class D amplifier chips, enabling the device to maintain ultra-low distortion across the entire audio frequency range while delivering high-definition sound. The wiring around the chip features a window tin spraying design to boost output power. Four low-noise NE5532 preamplifier groups enhance sound quality, volume, and gain. This compact amplifier receiver includes built-in Bluetooth 5.0, USB flash drive playback, USB sound card functionality, and a 3.5 mm AUX input. Bluetooth 5.0 mode provides faster transmission speed, lossless decoding, and a lower distortion rate, with a connection range of up to 15 meters (49 feet) to audio devices.
Note: When using AUX mode, ensure the Bluetooth connection on this module is disconnected. This Bluetooth amplifier module incorporates multiple protective mechanisms, including over-voltage, under-voltage, over-heat, and short-circuit protection, and comes with a protective case. Additionally, a durable ultra-quiet fan (featuring locked rotor protection, no burning, and minimal noise) is positioned above the audio chips for effective heat dissipation and board protection