ZK-TB21 TPA3116D2 Bluetooth 5.0 Subwoofer Amplifier Board 50WX2+100W 2.1 Channel Power Audio

Introduction to ZK-TB21 TPA3116D2 Amplifier

The ZK-TB21 TPA3116D2 Bluetooth 5.0 Subwoofer Amplifier Board is a high-performance audio amplifier board that delivers a powerful audio experience. With its impressive specifications, this amplifier board is perfect for music enthusiasts who want to enhance their audio system.

Key Features & Specifications

• Model: TB21 (Imported large chip)
• Input Mode: Bluetooth
• Work Voltage: DC 12V-24V (Above 2A)
• Channel: 2.1 CH Stereo Output
• Bluetooth version: Bluetooth 5.0
• Bluetooth transmission distance: 50 Ft
• MAX Power Output: 50W x 2 +100W
• Terminating Impedance: 4 Ohm-8 Ohm
• Match Speaker: 30watt-200wat
• DC socket: 5.5*2.1mm

Shipping & Delivery Information

All products in Joseph Elizabetb's store support cash on delivery. Stock shipped from Manila ✔. Orders will be shipped within 24 hours after ordering!!!

How to Connect ZK-TB21 to Your Audio System

Connecting the ZK-TB21 TPA3116D2 amplifier board to your audio system is simple and straightforward.

Bluetooth Pairing Instructions

1. Turn on your Bluetooth device and make sure it is discoverable.
2. Press and hold the power button on the amplifier board for 5 seconds until the LED light turns blue.
3. Select the ZK-TB21 from the list of available Bluetooth devices on your device.
4. Once connected, the LED light will turn green.

Connecting External Speakers

To connect external speakers, simply plug them into the amplifier board using the appropriate speaker terminals. Make sure the impedance of the speakers matches the terminating impedance of the amplifier board (4 Ohm-8 Ohm).

Maximizing Sound Quality with ZK-TB21

To get the best sound quality from the ZK-TB21 amplifier board, follow these tips.

Setting Up Optimal Impedance

Matching the impedance of your speakers to the terminating impedance of the amplifier board will help optimize sound quality. The ZK-TB21 supports speaker impedances ranging from 4 Ohm to 8 Ohm.

Adjusting Volume Levels

Adjust the volume levels on both the amplifier board and your Bluetooth device to achieve the desired sound output. Keep in mind that the maximum power output of the ZK-TB21 is 50W x 2 +100W.

Troubleshooting Common Issues

If you encounter any issues with the ZK-TB21 amplifier board, try these troubleshooting steps.

No Sound Output

1. Check if the speakers are properly connected to the amplifier board.
2. Verify that the volume levels on both the amplifier board and your Bluetooth device are set correctly.
3. Make sure the impedance of the speakers matches the terminating impedance of the amplifier board.

Poor Bluetooth Connection

1. Move closer to the amplifier board to ensure a strong Bluetooth signal.
2. Restart both the amplifier board and your Bluetooth device.
3. Check if there are any other Bluetooth devices interfering with the connection.

Power Supply Problems

1. Ensure that the power supply voltage is within the specified range (DC 12V-24V).
2. Check if the power supply current is above 2A.
3. Verify that the DC socket is properly connected to the amplifier board.