Enhance your audio experience with the ZK-502L Digital Power Amplifier Board, designed for versatile and high-quality sound amplification. Featuring Bluetooth 5.0 connectivity, this amplifier board supports seamless wireless stereo audio input with a strong, unobstructed signal range of up to 15 meters (49.2 feet). Compatible with a wide range of speakers from 4Ω to 8Ω and power outputs ranging from 12W to 50W per channel, it is ideal for speaker retrofitting, car Bluetooth audio systems, and other amplifier applications. Key Features: · **Bluetooth 5.0 Wireless Connectivity:** Enjoy stable and high-fidelity stereo audio streaming with the latest Bluetooth technology, ensuring a reliable connection and easy pairing with most devices. · **Dual Channel Stereo Output:** Supports left and right channel audio for immersive stereo sound, adaptable to various speaker configurations with power outputs adjustable from 12W to 50W per channel depending on voltage and speaker impedance. · **Multiple Input Options:** Besides Bluetooth, the amplifier board also supports AUX audio input, providing flexible connectivity options for your audio sources. · **Robust Protection Mechanisms:** Equipped with reverse polarity protection, overvoltage, undervoltage, over temperature, short circuit, and self-recovery overheating protections to safeguard the amplifier and connected devices, ensuring long-term reliability and safe operation. · **User-Friendly Controls:** Features a knob potentiometer design for convenient power ON/OFF control and volume adjustment, allowing precise sound tuning. · **High-Quality Sound Processing:** Built-in filter capacitor enhances sound signal processing, delivering clear and distortion-free audio without POP noises during power on, song skipping, or pausing. · **Durable Acrylic Protective Shell:** The transparent acrylic casing provides sturdy protection while allowing visibility of the internal components, combining durability with aesthetic appeal. · **Wide Voltage Compatibility:** Supports a broad input voltage range from 5V to 24V with optional adapters (9V, 12V, 15V, 18V, 24V), accommodating different power supply requirements and maximizing output power performance. Specifications: · Material: PCB · Model: ZK-502L · Bluetooth Version: 5.0 · Input Method: Bluetooth and AUX · Number of Channels: Left and Right Dual Channels (Stereo) · Signal to Noise Ratio: >90 dB · Adapted Power Supply Voltage: 5-24V (optional 9V/12V/15V/18V/24V adapters recommended for high power) · Adapted Speakers: 30W-200W, 4Ω-8Ω · Power Output:  - 12V: 8Ω/12W+12W, 4Ω/20W+20W  - 15V: 8Ω/18W+18W, 4Ω/30W+30W  - 19V: 8Ω/32W+32W, 4Ω/45W+45W  - 24V: 8Ω/38W+38W, 4Ω/50W+50W · Protection Mechanisms: Self Recovery Overheating Protection, Self Recovery Short Circuit Protection, Reverse Connection Protection, Overvoltage and Undervoltage Protection Package Includes: · 1 x Digital Power Amplifier Board (Model: ZK-502L) This high-performance Bluetooth power amplifier board offers reliable, distortion-free audio amplification with advanced protection features and versatile connectivity. Its compact design and durable acrylic shell make it perfect for upgrading existing speakers or integrating into custom audio projects, ensuring an enhanced listening experience in any environment.