Dual 50W Bluetooth 5.0 Audio Amplifier

Physical size: approx. 90 × 50 × 110 mm (3.5 × 1.9 × 4.3 inches); constructed with standard FR-4 PCB and surface-mount components for thermal reliability. Output: 50W × 2 channels into 4–16Ω speakers, driven by DC 9–24V supply — supports common 12V power bricks used across UK/EU consumer electronics. Wireless input via Bluetooth 5.0 (tested range up to 15m line-of-sight); wired options include 3.5mm AUX and USB audio. Integrated digital display shows current input mode and connection status. Verified signal-to-noise ratio ≥98dB, indicating careful grounding and filtering design to suppress switching noise and EMI. Unlike single-purpose amplifier boards, this unit bridges roles: it acts as a Bluetooth receiver/amplifier for phones and tablets, and as a plug-and-play USB DAC+amp for computers — eliminating need for extra cables or external DACs. Its flat frequency response and low harmonic distortion support accurate sound reproduction, especially important when repurposing vintage speakers or calibrating studio monitors. Designed for practical integration: mounting holes align with standard M3 screws; PCB layout minimises crosstalk between input and output stages; heatsink-ready design supports sustained output without thermal throttling under normal UK ambient temperatures.