JIAATGA ZK-TB21 Bluetooth amplifier board top view showing compact DIY hub
JIAATGA ZK-TB21 dual TPA3116D2 chips close-up for high fidelity
JIAATGA ZK-TB21 treble and bass knobs for on-device tonal control
JIAATGA ZK-TB21 Bluetooth and AUX inputs for flexible wireless setups
JIAATGA ZK-TB21 protective circuit guarding against overload and overheating
JIAATGA ZK-TB21 DIY speaker project ready for creative builds

JIAATGA

JIAATGA ZK-TB21 Bluetooth 5.0 2.1 Channel Amplifier Board — 50W+50W+100W

Free U.S. shipping and free 30-day returns. Check the compatible models in the description below.

$29.02

In stock. Ships free, usually within 1–4 business days.

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Check the listed compatible models and specs before you order. Questions? Email us.

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Free tracked shipping on every order. Most orders arrive within 3–8 business days.

Free 30-day returns

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Return eligible items within 30 days of delivery for a full refund. We email you a prepaid return label.

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During high demand, deliveries may experience short carrier delays. Tracking updates remain active for every order.

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Questions about fit or an order? Email nexoltic@gmail.com. We reply on business days (Mon–Fri).

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Product details

Overview

The ZK-TB21 from JIAATGA is a compact Bluetooth 5.0 amplifier board designed for DIY wireless speakers and small hi fi setups. Built around dual TPA3116D2 chips, it delivers a 2.1 channel stereo experience with low distortion (THD ≤ 0.1%) and clear, detailed playback, all in a space friendly package.

What makes it versatile

  • 2.1 channel output with a 50W + 50W + 100W configuration, suitable for compact speaker builds
  • Wide input range from 9 to 24 V DC for flexible power options
  • Bluetooth 5.0 plus an AUX input for diverse source connectivity
  • Independent treble and bass controls for on device tonal adjustments without needing extra gear
  • Protective features such as over voltage, under voltage, over heat, and short circuit protection

Real world uses

  • Upgrade a portable or desktop wireless speaker with robust amplification and built in tone controls
  • Design a compact home audio system or gaming setup with a clean Bluetooth link
  • Prototype DIY audio projects that mix wired and wireless inputs on a single board

Tips for best results

  • Power matters: higher supply voltage can increase available output, within safe limits
  • Speaker impedance affects output; plan your power supply accordingly to avoid under or overloading
  • When using AUX mode, ensure the Bluetooth connection is disconnected to prevent input conflicts

Safety and setup notes

Follow standard DIY electrical practices. The board includes multiple protection features to guard against common issues, and adequate ventilation helps maintain performance during longer use.

FAQ

Q: What is the JIAATGA ZK-TB21 amplifier board?

A: A Bluetooth 5.0 enabled 2.1 channel amplifier with dual TPA3116D2 chips and independent treble/bass controls for DIY wireless speakers.

Q: What power and inputs does it support?

A: Operates from 9-24V DC with Bluetooth and AUX inputs and protective features; ensure adequate supply and compatible speaker impedance.

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