ZK-TB21 Bluetooth Amplifier Board,50W+50W+100W 2.1 Channel Subwoofer Amp Board with Treble and Bass Control,Dual TPA3116D2 Chips Bluetooth5.0 and AUX Inputs,Stereo Digital AMP for DIY Home Speakers

Subwoofer Audio Amplifier Board: This ZK-TB21 upgraded power amplifier is 2.1 channel, allows you to connect 2 passive speakers and drive a subwoofer. The upgraded TB21 adds three XH2.54-3P terminals(power amplifier input interface, microphone pre-reverberation transmission interface and return interface). It comes with Treble and Bass buttons for an immersive sound experience
Dual TPA3116D2 HiFi Chip: The ZK-TB21 power amplifier board built in dual TPA3116D2 power amplifier chips, TPA3116D2 is a high performance class D power amplifier chip, which features ultra-high resolution, ultra-low distortion and high fidelity sound quality
50W*2+100W High Power Output: This TB21 audio amplifier has a maximum output power of 50W for the left and right channels, and a maximum output power of 100W for the subwoofer. It can drive two high-power speakers (20 - 200W, 4-8 ohms) and one subwoofer (20 - 100W), and the adapted power supply is DC12 - 24V / 5A or above
Multiple Audio Input Modes: This Mini amplifier receiver built-in Bluetooth 5.0 and 3.5mm AUX Input. 2.1 channel stereo output, faster transmission speed, lower distortion rate, connection distance to audio equipment is 10m/33ft. Note: When using AUX mode, please confirm that the Bluetooth connection of this module has been disconnected

How to Select the Audio Input Mode

This amplifier board has two input modes: Bluetooth and 3.5 mm AUX;

When both modes input audio signals at the same time, the amplifier board will give priority to the Bluetooth mode;

If you need to use the AUX mode, please make sure that the Bluetooth connection is disconnected.

ZK-TB21 Bluetooth Amplifier Board

Input Voltage: DC 12V-24V
Max Power Output: 50W*2(R&L)+100W(Subwoofer)
Input Method: Bluetooth & AUX
Channel: 2.1 CH Stereo Output
Output Impedance:4-8 O
Bluetooth Version:BT 5.0
Protection Functions: Reverse Connection Protection, Short Circuit Protection, Self-recovery Overheat Protection
Size: 120*100*22mm
Weight: 195g

Bluetooth and AUX Inputs

502510 mm Extra-large Heat Sink

The extra-large heat sink can provide good heat dissipation for the continuous high-power output of the AMP, thus preventing the chip from being burned.

Dual TPA3116 Chip

Dual TPA3116 D2 Amplifier IC

The maximum modulation frequency can reach 1.2MHZ, and the high-power output distortion is less than 0.1%, ensuring high-quality sound output.

with Treble and Bass Control

Independent Control of Treble and Bass

The bass audio and volume can be adjusted separately, and with the left and right channel speakers, the 2.1 channel brings you a richer sound experience.

Warm Reminder

The power switch on the board is a standby switch. After the switch is turned off, the machine is in a low-power standby state. To completely turn off the power or unplug it for a long time, you can unplug the DC plug on the machine.
Properly increasing the voltage or reducing the speaker impedance can effectively increase the output power.
It is recommended to use a power supply of 12-24V, 5A or more, and the speaker power is 50-100W for the best effect!