SPECIFICATIONS

1. This Bluetooth audio 2.1 channel power amplifier module has two audio input methods, AUX and Bluetooth, two in one. The 5.0 Bluetooth version has higher transmission efficiency and longer transmission distance.
2. The Bluetooth audio power amplifier module has 2.1 channels and the maximum output power is 2X50W+100W. With antenna and antenna base, the signal is better, the efficiency is high, and the anti‑interference ability is strong.
3. This power amplifier module has short circuit protection, overcurrent, overheating, and anti reverse protection to prevent complete failure. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage.
4. It adopts copper DC connectors and barrier terminals. It can withstand high current without heating or damaging wires. No DC head lead, compatible with the input power interface of this product, even if you don't have a DC head adapter or battery, you can easily wire it.
5. Provides a stable and fast connection with a wide range of compatibility. Easy to install and use. With bass, treble, subwoofer frequency and volume control, it is widely used in shop solicitation, home theater, quadrate speakers, etc.

Item Type: Power Amplifier Board
Material: PCB
Model: ZK-MT21
Bluetooth Version: 5.0 (Approx. 15m/49.2ft without Obstruction)
Audio Input: AUX + Bluetooth
Number Of Channels: 2.1 Channels
Input Sensitivity: 500mV
Adapted Power Supply Voltage: 12-24V/5A or More (Do Not Connect 24VBattery Pack)
Speaker: 20-100W, 4-8Ω
Output Power: Maximum 50W (left and Right Channel), Maximum 100W (Subwoofer)
Protection Mechanism: Anti reverse Connection, Overheating, Overcurrent, Short Circuit Protection
Purpose: Digital Power Amplifier Board

Tip: If the audio input is sufficient and the power supply voltage/current is sufficient, there is enough output power. The higher the power supply voltage, the greater the relative power. Speakers with different impedances will have different output power. In the case of sufficient voltage and current, the greater the ohm of the speaker, the smaller the relative sound power. Please make sure that the power of the adapter is greater than the actual working power of the amplifier.

1. 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. Turn off the power completely or unplug the DC plug on the machine for a long time.

2. Please use a power adapter with sufficient power to connect to the power amplifier board, otherwise the sound will be distorted.