Dual TPA3116 Subwoofer Amplifier Board with EQ, Bluetooth and AUX, DIY Speakers AMP (ZK-TB21)

The ZK-TB21 19V 4.74A Power Adapter is a versatile product that offers a range of features and capabilities. Boasting a 4.4 out of 5-star rating from 988 customer reviews, this power adapter is a reliable choice for various applications.

The power adapter features a TPA3116D2 class D power amplifier IC, which was launched by TI and offers high-performance specifications. With a maximum modulation frequency of 1.2MHz and a low output distortion of less than 0.1%, this amplifier chip provides excellent sound quality.

Equipped with a large 50x25x10mm heat sink, the ZK-TB21 ensures efficient heat dissipation, allowing for continuous high-power output without the risk of the chip overheating and being damaged.

The power adapter offers multiple input methods, including Bluetooth 5.0 and AUX. The Bluetooth connectivity provides a wireless connection with a transmission distance of up to 49 feet in an open environment, while the AUX input allows for wired audio input from devices without Bluetooth capabilities.

The ZK-TB21 is a 2.1 channel stereo output amplifier, delivering a maximum power output of 50W*2 (R&L) and 100W (subwoofer). It is compatible with speakers with an impedance range of 4-8Ω, and the recommended speaker parameters are 20-100W.

The power adapter features a range of safety protection functions, including reverse connection protection, short circuit protection, self-recovery overheat protection, and over-voltage and under-voltage protection, ensuring the device's safe and reliable operation.

The input voltage range of the ZK-TB21 is DC 12V-24V, and it is equipped with a high-grade fence terminal for convenient wiring, reducing the risk of short circuits.

The product also includes a treble and bass control feature, allowing users to fine-tune the audio output to their preferences, creating a movie theater-like listening experience.

Included in the package are the ZK-TB21 Power Amplifier Board, a protective shell, a DC plug, a screwdriver, and 5 control knobs, providing users with all the necessary components for easy installation and setup.

The manufacturer offers a 7x24 hours after-sales service, focusing on customer satisfaction and addressing any questions or issues that may arise with the product. If users encounter any quality problems or have inquiries, they can contact the manufacturer, who will provide a 100% satisfactory response.

In summary, the ZK-TB21 19V 4.74A Power Adapter is a versatile and high-performance power solution that combines a powerful TPA3116D2 amplifier, a range of input options, safety features, and excellent customer support, making it a compelling choice for various audio applications.

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