Bluetooth Audio Amplifier Board, ZK-TB21 2.1CH 50W x 2 +100W Subwoofer Power Amp with Treble and Bass Control, Bluetooth5.0 and AUX Inputs, Stereo Digital AMP for DIY Home Speakers

HIFI AUDIO AMPFILIER BOARD: This ZK-1002 Mini Bluetooth audio amplifier board is a 2.0 channel amp, it can contact two passive speaker(20-200W, 4-8Ω), DC7-24V/5A above. this power ampfilier with two TPA3116D2 chip, 4*red and gray ring inductors, distortion rate below 0.3%, and another upgrade large chips support AAC BT decoding, APP, low latency

Mini SIZE BUT POWERFUL: ZK-1002 audio power amplifier with a very mini size is 8.5 x 5.3 x 2.2 cm / 3.35 x 2.08 x 0.87 inch, Dual channel stereo output power 100W+100W, suitable for 4-8Ω speakers, It is recommended to use 50-100W speakers for the best effect

BLUETOOTH 5.0 INPUTS: The Bluetooth power amplifier board with 2 kind of inputs: AUX and Bluetooth inputs, the upgrade large chips support Bluetooth 5.0, low latency, The range of audio devices (smartphones, tablets, laptops, etc.) with Bluetooth connectivity is 15m/49ft. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected

Details and Quality: amplifier circuit board with 4 groups of red and gray ring inductors and 684 film capacitors, with low loss, high bandwidth, high fidelity characteristics; 2 pieces of TPA3116D2 chips have AM interference suppression, to ensure that the high-power output, and low distortion (less than 0.3%), the electrolytic capacitor array filtering effect is very good, ensure the output of the sound quality is more pure. They are specially customized for the ZK-1002 digital amplifier

Multiple Protections and Safety: This ZK-1002 Bluetooth amp module with multiple protections ensure safety in use, designed with over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, with case to protective it. Notice: ZK-1002 adaptive 20-200W, 4-8 ohm speakers. input voltage is DC 12V-24V/5A above, the speaker power, resistance and voltage relationships are as follows: 20W*2@12V,8 ohm; 35W*2@12V,4 ohm. 35W*2@19V,8 ohm; 60W*2@19V,4 ohm. 50W*2@24V,8 ohm; 100W*2@24V,4 ohm