The MT21 2.1-channel Bluetooth 5.0 amplifier board delivers powerful 100W subwoofer output and 50W×2 stereo output. Features independent bass and treble tone control for personalized sound, dual input modes (Bluetooth 5.0 + AUX), and wide voltage DC 12-24V support. Built-in reverse polarity, overheat, overcurrent, and short circuit protection ensures safe operation. Perfect for home theater systems, DIY subwoofer projects, soundbars, and karaoke setups.

Product Highlights:
1. Made with high-quality materials for reliable performance.
2. High cost-performance ratio: 100W+50W+50W Hi-Fi Bluetooth amplifier. Features a mature, stable design and pure sound quality—an economical choice for a 2.1-channel system!
3. Supports subwoofer + left/right channels; includes subwoofer output and treble/bass controls for an impressive, immersive audio experience.
4. Exquisite design and easy to use.
5. Wide range of applications.

Specifications:
Product Name: 2.1-Channel Bluetooth Audio Amplifier Module
Model: MT21
Bluetooth Version: 5.0 (unobstructed range: 15 meters)
Input Sensitivity: 500mV
Input Method: AUX + Bluetooth
Channels: 2.1
Amplifier Chip: Domestic amplifier chip
Power Supply: DC 12–24V / 5A or higher (do not connect to 24V battery packs)
Compatible Speakers: 20–100W, 4–8Ω
Output Power: Left/Right Channels <50W; Subwoofer <100W
Protection Mechanisms: Reverse polarity, overheating, overcurrent, and short-circuit protection
Dimensions: 93mm x 90mm x 22mm
Weight: Approx. 185g (including packaging)

Note:
Sufficient output power is achieved only when the audio input signal and power supply voltage/current are adequate!
Higher supply voltage and lower speaker impedance result in higher output power! Please ensure the power supply's rating exceeds the amplifier's actual operating power!

Package Contents:
Amplifier Board x1