DiGiYes ZK-MT21 Bluetooth Power Amplifier Board | 2.1 Channel 50W x 2 + 100W

Upgrade your audio with the DiGiYes ZK-MT21

Turn a simple speaker setup into a versatile listening space with the DiGiYes ZK-MT21. This compact power amplifier board blends wireless streaming, robust 2.1 channel output, and practical tone controls, making it a versatile choice for DIY projects and small home theaters.

What it is built for

The ZK-MT21 pairs Bluetooth 5.0 with a 3.5mm AUX input, so you can feed audio from a smartphone, tablet, or compatible device. With a maximum output of 2x50W for the left and right channels and 100W for the subwoofer, it has the headroom to handle lively music and dynamic scenes.

• Bluetooth 5.0 offers stable wireless playback and a generous range when there are no obstacles—up to about 49 feet.
• Dual top-level channels plus a dedicated subwoofer channel create a 2.1 configuration suitable for compact rooms.
• Boost and trim your sound with bass, treble, subwoofer frequency, and master volume controls.
• Rugged protection includes short circuit, over-current, over-heat, and anti-reverse safeguards to help maintain safe operation.
• Power input uses a copper DC connector and fence-type terminals designed to handle higher current with less heat buildup.

Sound shaping in practice

The built-in tone controls let you refine the listening mood—from crisp highs for podcasts to warm lows for movie scenes. The subwoofer channel adds depth to music and effects, without needing separate gear.

• Adjust volume and tone to match your room and speakers, making quiet nights or lively gatherings feel just right.
• Easy integration with existing 6.5" or 8" drivers in the recommended impedance range, thanks to clear speaker matching guidance.

Practical use cases

Whether you’re assembling a DIY speaker, upgrading a stereo in a living space, or setting up a compact home theater, ZK-MT21 offers flexible inputs and straightforward setup.

• Compact home theater amplification for a bookshelf setup.
• Garage or workshop audio with Bluetooth streaming and reliable protection features.
• Patio or small outdoor space with wireless playback from mobile devices.
• DIY audio projects that require a robust 2.1 channel amp with tone controls.

Key specs at a glance

Power: 2x50W + 100W sub, Input: Bluetooth 5.0 + 3.5mm AUX, Power: 12V–24V DC, Connectors: copper DC, 5.5mm x 2.1mm plug. Protection: short-circuit, over-current, over-heat, anti-reverse.

Note: For optimal performance, keep the supply voltage under 22V to avoid triggering overvoltage protection, which could limit maximum output.