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Green rectangular amplifier board with silver heatsinks and black control knobs

Pyle JA-MT21 2.1 Bluetooth 5.0 Amplifier Board 50W+50W+100W

SKU CH-QJKY-WV60B

A 2.1 channel Bluetooth 5.0 amplifier board delivering 50 W per satellite and 100 W to a subwoofer from a 12–24 V DC supply, with treble and bass knobs, AUX input and full protection circuits

  • ModulationQuick Start Guide
  • Accessory TypeQuick Start Guide
  • InputsQuick Start Guide
  • FeatureQuick Start Guide
  • Package ContainsQuick Start Guide
  • Bluetooth 5.0 gives stable wireless audio up to 15 m
  • 1 channel output drives stereo speakers plus a subwoofer
  • 50 W + 50 W + 100 W delivers strong power for DIY speaker builds
  • Treble and bass knobs let you shape sound without a separate preamp
  • DC 12-24 V input works with common power supplies

Bluetooth 5.0 stereo amplifier board

The Pyle JA-MT21 is a 2.1 channel Bluetooth 5.0 amplifier board rated at 50W per satellite channel and 100W for the subwoofer. It accepts DC input from 12V to 24V and includes independent treble and bass knobs for tone shaping without a separate preamp. Dual TDA3116D2 chips drive the output stage with THD specified at 0.1%.

Upgrading from basic mono modules

This board replaces single-channel or 2.0 amplifier modules when a dedicated subwoofer channel and wireless streaming are required. The jump is worth it for DIY speaker builders who need Bluetooth 5.0 connectivity up to 15m range plus a 3.5mm AUX input, and who want built-in protection against over-voltage, under-voltage, over-heat and short-circuit conditions.

Integration into a custom speaker build

The compact PCB measures 92mm by 90mm by 22mm and runs from a DC 12-24V supply rated at 5A or higher, though 24V battery packs are not supported. It drives speakers rated 20-100W at 4-8 ohms with an input sensitivity of 500mV. Reverse polarity, over-current, over-heat and short-circuit protection free the builder from adding external protection circuitry.

Highlights

  • Bluetooth 5.0 gives stable wireless audio up to 15 m
  • 1 channel output drives stereo speakers plus a subwoofer
  • 50 W + 50 W + 100 W delivers strong power for DIY speaker builds
  • Treble and bass knobs let you shape sound without a separate preamp
  • DC 12-24 V input works with common power supplies

Specifications

BrandPyle
SeriesQuick Start Guide
Part NumberJA-MT21
ModulationQuick Start Guide
Accessory TypeQuick Start Guide
InputsQuick Start Guide
FeatureQuick Start Guide
Package ContainsQuick Start Guide

Questions about this item

What physical space does the 92 mm by 90 mm board with 22 mm height need inside my enclosure?

The module measures 92 mm long by 90 mm wide and stands 22 mm tall, so allow at least that footprint plus clearance for the 3.5 mm AUX jack, power terminals and the treble and bass knobs on the edges.

How do I connect the DC 12 V to 24 V supply without triggering the reverse-polarity protection?

Wire the supply positive to the board's VCC terminal and negative to GND, verifying polarity before power-on; the on-board protection will shut the amp down if the connections are swapped.

When should I replace the power supply if the subwoofer channel drops below 100 W output?

If the supply voltage sags under load or cannot deliver 5 A continuously, the subwoofer channel will lose headroom; upgrading to a higher-current 12 V to 24 V source restores full output.

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