Compact Stereo Power for Premium DIY Audio The GOLD A502 Bluetooth Digital Amplifier Board is a high-efficiency 2.0 channel stereo module designed to deliver crisp, powerful audio in a small form factor. Delivering 30W per channel, this amplifier is the perfect choice for building custom desktop speakers, portable Bluetooth boomboxes, or enhancing small-scale home audio setups. At Robogears, we recommend the Gold-Series for its superior signal stability and high-quality surface-mount components that ensure long-term reliability.
High-Fidelity Bluetooth 5.0 Streaming Featuring an advanced Bluetooth 5.0 chipset, the A502 provides a stable and fast wireless connection with a range of up to 10-15 meters. It is designed to pair seamlessly with smartphones, tablets, and laptops. For those who prefer a wired connection, the board includes a built-in 3.5mm AUX input. The module intelligently manages inputs, allowing you to enjoy high-definition audio from any source with minimal distortion and zero noise floor during idle.
Precision Engineering and Thermal Stability The A502 is built for endurance. Despite its slim profile, it utilizes a high-efficiency Class-D architecture that generates very little heat. The "Gold" designation refers to the high-grade PCB traces used to maintain signal integrity and prevent interference. With an onboard high-quality potentiometer for volume control, this board is ready for immediate integration into your next creative audio project.
Note: The product images provided are for illustration purposes only. The actual product may vary slightly in terms of design, color, or component layout due to manufacturing updates, but technical specifications will remain as described.
Key Highlights:
30W Dual Output: Optimized for 4-ohm and 8-ohm passive speakers.
Bluetooth 5.0 + AUX: Multiple input options for modern and legacy devices.
Ultra-Compact Footprint: Fits easily into tight project boxes and custom enclosures.
Wide Voltage Compatibility: Works with any DC power source from 9V to 24V.
Low Distortion Architecture: Ensures clear vocals and balanced bass at high volumes.
Product Model: GOLD A502
Amplification Class: Class D
Output Impedance: 4$\Omega$ to 8$\Omega$
Frequency Response: 20Hz – 20kHz
Supply Voltage: DC 9V – 24V (2A - 4A recommended)
Efficiency: >90%
Audio Port: 3.5mm Stereo Jack + Bluetooth
Dimensions: ~70mm x 50mm x 18mm
Installation Tip from Robogears: For the best balance of power and heat, a 19V 3A DC power supply is highly recommended. Ensure that the speaker wires are securely connected to the terminals before powering on the board to avoid any short circuits.
