HKD ZK-502M Bluetooth 5.0 50W+50W Power Audio Amplifier Module

The HKD ZK-502M is a compact, high-performance Bluetooth 5.0 audio amplifier module designed for DIY audio enthusiasts, hobbyists, and professional projects. It delivers a powerful 50W+50W stereo output, offering crystal-clear audio and impressive dynamic range for a wide variety of speaker setups. The module is engineered to provide high-fidelity sound with robust protection and versatile connectivity, making it ideal for home audio systems, portable speaker projects, and educational electronics experiments.

Bluetooth Connectivity:
Featuring Bluetooth 5.0, the ZK-502M supports stable, low-latency wireless audio streaming with a range of over 15 meters in open space. Its wireless capability allows seamless connection to smartphones, tablets, laptops, and other Bluetooth-enabled devices. The module uses the "Wuzhi Audio" Bluetooth name for easy pairing and supports high-quality audio transmission for an enhanced listening experience.

Versatile Audio Inputs:
This amplifier module supports multiple audio input options including:

• Bluetooth wireless input for convenient cable-free audio streaming.
• AUX input for connecting MP3 players, smartphones, or other line-level audio devices.
• USB flash disk input for direct playback of stored audio files.
• Computer USB input (plug-and-play) for digital audio playback.

Power Supply and Output Performance:
The module can operate on a wide DC voltage range of 5V to 24V, with higher voltages recommended for maximum output power. It supports speakers from 10W to 100W and impedances between 4 and 8 , providing flexibility for different speaker configurations. Depending on the supply voltage and speaker impedance, the module can deliver the following output:

• 12V: 8 12W + 12W, 4 20W + 20W
• 15V: 8 18W + 18W, 4 30W + 30W
• 19V: 8 30W + 30W, 4 40W + 40W
• 24V: 8 40W + 40W, 4 50W + 50W

Protection Features:
The ZK-502M incorporates advanced overheat, overcurrent, and short-circuit protection to ensure the safety and longevity of both the amplifier and connected speakers. This makes it reliable for continuous operation under various conditions, reducing the risk of damage caused by excessive load or thermal stress.

Design and Build:
The module is built with a high-quality domestic amplifier chip for consistent performance and durability. Its compact size (60 × 60 × 29 mm) and lightweight 96g design make it easy to integrate into custom enclosures, DIY projects, or portable systems. The amplifier module is equipped with intuitive input and output pins for straightforward installation and connection to speakers and power supplies.

Applications:
The ZK-502M is ideal for a wide range of applications, including:

• DIY home audio systems and stereo speakers
• Portable Bluetooth speaker projects
• Educational electronics experiments and STEM projects
• Robotics and hobbyist audio integration
• School projects, maker kits, and science fairs

With its combination of high output power, versatile connectivity, and robust protection, the HKD ZK-502M is a reliable and powerful solution for anyone looking to build, upgrade, or experiment with Bluetooth audio amplification. It offers flexibility, performance, and durability in a compact, user-friendly package.

What's in the box
1 x HKD ZK-502M Bluetooth 5.0 Digital Amplifier Module Kit