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Green printed circuit board with black components and silver connectors

Ruth's sister

Ruth's sister internal power cable ZK-MT21

SKU CH-WY3W-7CJYJ

2.1-channel digital amplifier board delivers stereo and subwoofer output with Bluetooth and AUX inputs for 12 V or 24 V systems

  • 1 channel audio with dedicated subwoofer output
  • 50 W per satellite plus 100 W subwoofer power
  • Bluetooth-compatible wireless streaming
  • Operates on 12 V or 24 V DC supply

Amplifier board with stereo and subwoofer output

The ZK-MT21 board delivers 2.1 channel audio with two 50 W satellite channels and a 100 W subwoofer channel. It operates from a 12 V or 24 V DC supply and provides both Bluetooth and AUX inputs for wired or wireless sources. Compact digital circuitry keeps distortion low across the full power range.

Suitable for DIY speaker builds

This module suits hobbyists building powered speakers or upgrading small sound systems where a single-board stereo-plus-sub solution is required. Builders who need more than 100 W for the subwoofer channel or who require multi-zone output should look at a different amplifier.

Highlights

  • 1 channel audio with dedicated subwoofer output
  • 50 W per satellite plus 100 W subwoofer power
  • Bluetooth-compatible wireless streaming
  • Operates on 12 V or 24 V DC supply

Specifications

No published specifications for this item yet.

Questions about this item

Will the ZK-MT21 amplifier board run from the same 12V rail that powers my existing drives and fans?

Yes, the board accepts a 12V supply and delivers 2x50W plus 100W across its 2.1 channels, so it can share a standard 12V rail in your build.

How can I confirm the ZK-MT21 is operating correctly once installed?

Apply 12V or 24V power, pair a source via Bluetooth or use the AUX input, then verify sound from both stereo speakers and the subwoofer channel.

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