Daakro ZK-MT21 Bluetooth Amplifier Board — 2.1 Channel 50W+50W+100W, 9-24V, Bluetooth 5.0 AUX

Meet the Daakro ZK-MT21 Bluetooth Amplifier Board, a compact yet powerful solution designed for DIY audio projects and wireless listening. Built around dual HiFi chips with PurePath technology, this board targets ultra-high resolution and low distortion, delivering faithful sound across a 2.1-channel setup. Each of the left and right channels can output up to 50W, while the subwoofer peak reaches 100W, providing a well-rounded listening experience with clear highs, punchy bass, and defined midrange for a variety of music and media.

Flexibility sits at the core of the ZK-MT21. It supports two input modes—Bluetooth 5.0 for easy wireless streaming and a traditional AUX input for wired sources. This dual approach lets you connect phones, TVs, laptops, or other devices without sacrificing compatibility. The result is a versatile foundation for upgraded speakers, custom builds, or portable audio setups that can adapt to your space and workflow.

Key capabilities at a glance

• Dual HiFi chips with PurePath technology for high-resolution sound and minimal distortion.
• 2.1-channel configuration: 50W per left/right channel and up to 100W for the sub.
• Bluetooth 5.0 wireless input plus a standard AUX input for flexible source options.
• Wide voltage range from 9V to 24V DC, compatible with 9V, 12V, 15V, 18V, or 24V supplies.
• Suitable for 30–200W, 4–8Ω speakers, accommodating a range of speaker sizes and needs.
• Comprehensive protection: over-voltage, under-voltage, over-temperature, short-circuit, and reverse connection safeguards.
• Power matching notes help optimize performance by aligning input, supply voltage, and speaker impedance.

Reliability, protection, and practical setup ideas

• Robust built-in protections reduce risk during testing and everyday use.
• Flexible power options make it suitable for DIY projects, small rooms, or workshop builds.
• Ideal for upgrading bookshelf systems, compact home theaters, or wireless speaker bundles.

Practical uses and setup ideas

• Upgrade a compact bookshelf system for clearer highs, tighter mids, and deeper bass.
• Create a DIY wireless speaker setup that streams from mobile devices to living spaces or studios.
• Experiment with different speakers from small to mid-sized to explore room-filling sound variations.
• Integrate into a home cinema or gaming station for an enhanced 2.1 channel listening experience.

Note: For best results, pair the ZK-MT21 with a suitable power supply and speakers. Higher impedance speakers may require more voltage to achieve stronger output, and proper matching can help balance performance across channels. This board is designed to support a range of configurations, making it a flexible option for hobbyists and enthusiasts alike.