2.1 Channel Bluetooth 5.0 Audio Power Amplifier Board, JR-MT21 50 * 2+100W HiFi Subwoofer Audio AMP with Treble and Bass Control BT and AUX Inputs Module, DC12-24V Stereo AMP Module for DIY Speakers.

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• 2.1 Channel Power Amplifier Module : JR-MT21 audio power amplifier with mini size 9 x 9.3 x 2.2 cm /3.54 x 3.66 x 0.87 inch, but Powerful, Dual channel stereo output power 50*2+100W, suitable for 4-8Ω speakers, It is recommended to use 50-100W speakers for the best effect.
• HiFi Audio Amplifier Board : JR-MT21 Mini Bluetooth audio power amplifier module is a 2.1 channel amp, it can contact two passive speaker(50*2+100W), DC12-24V (5.5X2.1mm) . distortion rate below 0.3%, low latency.
• 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 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 JR-MT21 digital amplifier.
• Multiple Protections and Safety: This JR-MT21 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: JR-MT21 adaptive 30-200W, 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