ZK-TB22 2.2-Ch Bluetooth Amplifier Board 75W+75W+145W
ZK-TB22 2.2-Ch Bluetooth Amplifier Board 75W+75W+145W
Gaqqee ZK-TB22 2.2-Channel Dual Subwoofer Bluetooth Amplifier Board
Upgrade your home audio setup, desktop speaker system, or car audio with the Gaqqee ZK-TB22 — a powerful 2.2-channel Bluetooth amplifier board delivering 75W + 75W stereo output plus a massive 145W + 145W dual subwoofer output. Packed with versatile inputs, audiophile-grade components, and robust protection circuits, this module is the all-in-one amplifier solution for serious audio enthusiasts and DIY builders alike. Made in Mainland China.
Key Features
- 2.2-Channel Power Output: Independent left/right stereo channels (75W each) plus dual subwoofer channels (145W each) — no additional expansion modules needed.
- Multiple Input Modes: Bluetooth 5.0, AUX, PC (USB audio), and USB — seamlessly switch between all your audio sources. Bluetooth takes priority; simply disconnect Bluetooth when using an audio cable input.
- Lossless Audio Decoding: Supports multiple audio formats for crystal-clear, high-fidelity playback across all input methods.
- Audiophile-Grade Op-Amps: Dual-encapsulated, replaceable audiophile-grade operational amplifiers for superior sound quality, plus a reserved microphone expansion port for future upgrades.
- Full EQ & Volume Control: Independent volume control for left/right channels and both subwoofers; customizable treble, midrange, and bass equalization for a tailored listening experience.
- Wide Wireless Range: Bluetooth range up to 15 meters for freedom of movement.
- Comprehensive Protection: Built-in input undervoltage, overheating, overcurrent, short-circuit, and reverse polarity protection keep your setup safe.
- Versatile Application: Ideal for home desktop audio systems, retail store speakers, and car audio upgrades.
Technical Specifications
| Model | ZK-TB22 |
| Channels | 2.2 (Left + Right + Dual Subwoofer) |
| Max Output Power | 75W + 75W (stereo) / 145W + 145W (subwoofer) |
| Supply Voltage | DC 12–24V (Recommended: 24V DC, 10A or higher) |
| Compatible Speakers | Stereo: 20–75W, 4–8Ω | Subwoofer: 50–150W, 2–8Ω |
| Input Methods | Bluetooth + AUX + PC + USB |
| Bluetooth Range | 15 meters |
| Board Dimensions | 117 × 116 mm (integrated pot) / 117 × 101 mm (external pot) |
| Power Consumption | Low Power Consumption |
| Package Contents | 1 × Amplifier Board, 1 × Screwdriver |
Important Power Supply Notes
- Use a DC power supply only — AC power is NOT supported.
- Recommended: 24V DC at 10A or higher. Do not use a 24V battery (overvoltage risk when fully charged).
- If using a DC/DC boost module, set the output voltage to 80% of the limit voltage to prevent damage from overshoot or ripple.
- Always ensure your power supply capacity exceeds the amplifier's actual operating power for safe, optimal performance.
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Frequently Asked Questions
Q: What power supply does the ZK-TB22 Bluetooth amplifier board require?
A: The ZK-TB22 requires a DC 12–24V power supply with a current rating of 10A or higher. A 24V DC supply is recommended for maximum output power. AC power is not supported. Avoid using a 24V battery due to potential overvoltage when fully charged. Always ensure your power supply capacity exceeds the amplifier's actual load for safe operation.
Q: Can the ZK-TB22 amplifier board be used for car audio installations?
A: Yes! The ZK-TB22 is well-suited for car audio upgrades. It operates on DC 12–24V, which is compatible with standard automotive electrical systems. With 75W+75W stereo and dual 145W subwoofer channels, it delivers powerful, full-range audio for in-vehicle setups.
Q: What input methods does the ZK-TB22 amplifier board support?
A: The ZK-TB22 supports four input methods: Bluetooth (up to 15m range), AUX (3.5mm audio cable), PC (USB audio), and USB. Bluetooth takes priority over other inputs — to use AUX, PC, or USB, make sure Bluetooth is disconnected first.
Q: Does the ZK-TB22 have built-in protection features?
A: Yes. The board includes comprehensive protection mechanisms: input undervoltage, overheating, overcurrent, short-circuit, and reverse polarity protection — helping to safeguard both the module and your connected speakers during operation.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.