XY-AP50L 50WX2 Mini Bluetooth 5.0 Wireless Audio Power Digital Amplifier Board

XY-AP50L 50WX2 Mini Bluetooth 5.0 Wireless Audio Power Digital Amplifier Board is a high-efficiency, dual-channel digital audio amplifier module designed to deliver premium sound amplification in a remarkably compact form factor. This advanced class-D board outputs up to 50W per channel into twin stereo outputs, allowing you to build or upgrade custom wireless speaker setups effortlessly. Consequently, it represents an ideal solution for DIY audio enthusiasts who require powerful sound reproduction without bulky enclosures. The integrated Bluetooth 5.0 transceiver provides stable, long-range wireless streaming alongside multiple physical input methods. Furthermore, the module interfaces seamlessly with the Sinilink mobile application for intelligent control over your acoustic experience. Therefore, you can reliably use this high-fidelity component to build portable wireless speakers or retrofit vintage audio hardware.

Key Features:

• High-Power Dual Output: Delivers 50W + 50W dual-channel stereo output power, easily driving a wide range of passive shelf and floor speakers.
• Versatile Audio Inputs: Supports four independent input modes, including Bluetooth 5.0, a standard 3.5mm AUX jack, USB flash drives, and direct PC-USB sound card mode.
• Smart App Integration: Connects to the Sinilink mobile application, enabling users to adjust equalizers, change Bluetooth names, and set connection passwords directly from their smartphone.
• Comprehensive Circuit Protection: Features built-in safeguards against reverse polarity, output short-circuits, and over-temperature faults to protect the module and connected hardware.
• Multifunctional Encoder: Incorporates a 360° infinite rotary encoder knob that adjusts the volume level, registers short presses for play/pause, and tracks long presses to power the system down.

Technical Specifications:

• Operating Voltage Range: DC 5.0 V to 24 V (12V to 19V with a minimum 4A supply recommended for optimal power output)
• Maximum Output Power: 50 W + 50 W (at 24 V into a 4 Ω speaker load)
• Bluetooth Version: BLE 5.0
• Wireless Transmission Range: Up to 15 m maximum (without major obstructions)
• Compatible Speaker Impedance: 4 Ω to 16 Ω
• Signal-to-Noise Ratio (SNR): ≥ 102 dB
• Total Harmonic Distortion: ≤ 0.04%
• Audio Output Configuration: Supports both passive speaker terminal blocks and active 3.5mm line out/headphone connections.

Mechanical Specifications:

• Amplifier Architecture: Class-D Digital Power Amplifier
• Input Terminals: DC 5.5 x 2.1mm power barrel socket, 3.5mm stereo jack, and standard Type-A USB socket.
• Output Terminals: 4-pin screw terminal blocks for passive speakers and 3.5mm auxiliary audio out.
• Enclosure Type: Dual-layer acrylic protective shell plates with copper standoffs.

Dimensions:

• Board Length: ≈ 52 mm
• Board Width: ≈ 52 mm
• Total Height: ≈ 26 mm (including the volume control knob height)
• Weight: ≈ 35 g

Pinout and Wiring:

• DC Input (5V-24V): Connect a regulated DC power supply to the 5.5mm barrel jack or the dedicated V+ and GND wire pads.
• L+ / L- Terminals: Connect the positive and negative terminals of the left passive channel loudspeaker.
• R+ / R- Terminals: Connect the positive and negative terminals of the right passive channel loudspeaker.
• AUX IN / OUT: Insert an auxiliary line input source or extract an active audio signal out to headphones or another power amplifier.
• Wiring Note: However, always ensure the input power supply matches the speaker impedance; utilizing a 24V supply on a 4 Ω speaker without adequate cooling may trigger thermal protection.

Datasheet Reference:

• Download Sinilink XY Series Audio Amplifier Board Manual

Commonly Used in:

• Custom DIY Audio Builds: Constructing bespoke desktop audio gear or custom portable boomboxes from scratch.
• Vintage Speaker Conversions: Upgrading older, analog stereo cabinets into modern wireless sound platforms.
• Compact Desktop Media Systems: Driving small passive bookshelf monitors directly from computer sound outputs or phones.

Applications:

• Home Audio Distribution: Creating low-profile, localized wireless sound nodes in individual rooms or workshops.
• Automotive Bluetooth Retrofits: Installing compact auxiliary audio amplifiers into camper vans, cars, or boats.
• Interactive Multimedia Systems: Providing cost-effective, high-volume audio systems for commercial exhibits or arcade cabinets.

Equivalent Models:

• XY-P50W: A stripped-down, ultra-slim version sharing identical power outputs but lacking multiple physical input options.
• ZK-502C: A popular alternative module that utilizes a comparable Class-D design and offers similar dual 50W outputs.
• TPA3116D2 Module: A bulkier industrial Class-D board, however, it generally requires external wireless receiver add-ons.

Package Includes:

• 1 x XY-AP50L 50WX2 Mini Bluetooth 5.0 Wireless Audio Power Digital Amplifier Board
• 1 x Upper Acrylic Protective Enclosure Shell Plate
• 1 x Lower Acrylic Protective Enclosure Shell Plate
• 1 x Industrial Volume Control Knob Cap
• 1 x Accessories Pack (Assembly Standoffs, Fastening Screws, and DC Adapter Lead)