XH-A233 Bluetooth Power Amplifier Board

XH-A233 Bluetooth Power Amplifier Board is an ultra-compact, highly efficient dual-channel digital audio amplifier module designed to bring wireless sound capabilities to DIY speaker projects and audio renovations. This versatile board features a high-performance class-D amplifier architecture that delivers 15W + 15W stereo output, driving standard 4 Ω or 8 Ω speakers with remarkable clarity. Consequently, it offers an incredible power-to-size ratio that easily fits into tight enclosures. The board incorporates an onboard Bluetooth 4.2 receiver alongside an integrated TF card slot, allowing the system to toggle seamlessly between wireless streaming and direct offline media playback. Furthermore, onboard tactile buttons provide convenient user control over volume adjustment and track selection directly from the hardware. Therefore, you should choose the XH-A233 module as your go-to solution for transforming passive desktop speakers into a modern, wireless sound system.

Key Features:

• Dual Input Micro-Entertainment: Supports both stable Bluetooth 4.2 wireless streaming and standard TF micro-SD card playback for complete standalone audio utility.
• High-Efficiency Class-D Amplification: Produces clear, powerful dual-channel sound output while generating minimal heat during continuous peak operation.
• Intelligent Input Priority: Defaults automatically to the TF card input upon insertion, which simplifies operation when mixing local media with Bluetooth signals.
• Onboard Controls: Features integrated push-buttons that allow users to short-press for track switching and long-press for precise volume adjustment.
• Wide Voltage Versatility: Operates dynamically across a wide input range, enabling seamless integration with 12V automotive power networks or 24V desktop supplies.

Technical Specifications:

• Product Model: XH-A233
• Input Voltage Range: DC 12 V to 24 V
• Audio Output Power: 2 x 15 W (Stereo Dual Channel)
• Bluetooth Version: Bluetooth 4.2
• Wireless Transmission Distance: ≈ 0 to 15 m (Unobstructed line of sight)
• Speaker Load Compatibility: 4 Ω to 8 Ω
• Operating Temperature Range: −20°C to +85°C
• Operating Humidity Limit: 5% to 95% RH (Non-condensing)

Mechanical Specifications:

• Board Material: High-grade FR4 Double-sided Printed Circuit Board
• Terminal Blocks: Screwless plug-in style or solder-pad connections for power and speaker wiring
• Control Interface: Onboard SMD tactile switches (Three configuration layout)
• Storage Slot: Push-pull Micro-SD / TF card socket

Dimensions:

• Overall Module Length: ≈ 55 mm
• Overall Module Width: ≈ 50 mm
• Total Profile Height: ≈ 12 mm
• Installation Pitch Dimensions: ≈ 49 mm x 44 mm
• Mounting Hole Diameter: Φ 3 mm

Pinout and Wiring:

• Power Input (VCC / GND): Connect a filtered DC power source between 12V and 24V to the dedicated power inputs, ensuring correct polarity.
• Left Channel Output (L+ / L-): Route these terminals directly to the positive and negative terminals of your left passive loudspeaker.
• Right Channel Output (R+ / R-): Route these terminals directly to the positive and negative terminals of your right passive loudspeaker.
• Wiring Note: However, avoid bundling speaker output wires tightly with power supply cables, as this arrangement can couple electromagnetic interference into the audio path.

Datasheet Reference:

• Download XH-A233 Bluetooth Amplifier Reference Manual

Commonly Used in:

• DIY Wireless Speakers: Serving as the main internal receiver and power amplifier unit for custom-built portable boomboxes.
• Desktop Audio Upgrades: Converting vintage or passive multi-media speakers into modern wireless assets.
• Vehicle Sound Systems: Providing standalone, low-cost secondary Bluetooth audio solutions in camper vans, cars, or boats.

Applications:

• Kiosk Audio Systems: Delivering continuous loops of background or promotional music via a local TF card.
• Home Workshop Audio: Powering simple, wall-mounted sound setups controlled easily from a distance via smartphone.
• Electronics Education: Acting as an approachable, highly rewarding assembly module for students studying digital electronics and acoustics.

Equivalent Models:

• XY-WR30W: A similar low-cost, dual-channel 30W Bluetooth power amplifier board featuring an active app control option.
• XH-M314: A slightly larger TPA3118-based Bluetooth amplifier board, although it typically draws higher current and provides an auxiliary input.
• VHM-314 (Amplified Version): An alternative miniature Bluetooth receiver board integrated with a lower-power stereo output stage.

Package Includes:

• 1 x XH-A233 Bluetooth Power Amplifier Board