ZK-MT21 Bluetooth 5.0 Subwoofer Amplifier Board 50Wx2+100W 2.1 Channel Power Audio Stereo Amplifier Tone Board Bass AMP AUX

The ZK-MT21 is a versatile 2.1 channel audio amplifier module featuring Bluetooth 5.0 connectivity and powerful amplification capabilities. With 50W per channel for left/right speakers and 100W for the subwoofer, this amplifier board delivers rich, dynamic sound for your audio projects.

Key Features:

• Bluetooth 5.0 wireless connectivity (15-meter range without shielding)
• Dual audio input: Bluetooth + AUX for flexible connectivity
• Powerful 2.1 channel output: 50W x 2 + 100W subwoofer
• Wide power supply range: DC 12-24V / 5A or above
• Comprehensive protection: Anti-reverse connection, overheat, overcurrent, and short circuit
• Supports 4-8Ω speakers (20-100W)
• Compact design: 93mm x 90mm x 22mm
• Easy integration with tone and bass control

Technical Specifications:

• Product Model: ZK-MT21
• Bluetooth Version: 5.0 (15-meter range, no shielding)
• Input Sensitivity: 500mV
• Audio Input: AUX + Bluetooth
• Channel Configuration: 2.1 (Left, Right, Subwoofer)
• Chip Solution: Domestic power amplifier chip
• Power Range: DC 12-24V / 5A minimum (Do not connect to 24V battery pack)
• Compatible Speakers: 20-100W, 4-8Ω impedance
• Output Power: Left and right channels up to 50W each, Subwoofer up to 100W
• Protection Mechanisms: Anti-reverse connection, overheat, overcurrent, short circuit
• Product Dimensions: 93mm x 90mm x 22mm
• Package Weight: Approximately 185 grams (with packaging)

Important Usage Tips:

For Optimal Performance: Sufficient output power requires adequate audio input and power supply voltage/current. The higher the power supply voltage, the greater the output power. Similarly, smaller speaker impedance results in greater output power.

Power Supply Requirement: Ensure that your adapter power supply has greater capacity than the actual working power of the amplifier to prevent performance issues or damage.

Safety Note: Do not connect to 24V battery packs. Use a regulated DC power supply within the 12-24V range with at least 5A current capacity.

Applications:

Perfect for DIY audio systems, home theater setups, car audio upgrades, multimedia speakers, portable sound systems, and any project requiring powerful 2.1 channel amplification with wireless Bluetooth connectivity.