The Gold AP55 50W + 50W Stereo Audio Amplifier Module is a high-power digital stereo amplifier with a built-in Bluetooth audio receiver, USB flash drive playback, TF (Micro SD) card support, AUX input, and FM radio. Designed for DIY speaker systems, home audio, car audio, multimedia players, and portable sound systems, it delivers up to 50W + 50W stereo output when paired with a suitable power supply and speakers.
Features
- Full Name: Gold AP55 50W + 50W Bluetooth Stereo Audio Amplifier Module
- High-power 50W + 50W stereo output
- Bluetooth wireless audio streaming
- USB flash drive playback
- TF (Micro SD) card support
- AUX audio input
- Built-in FM radio
- LED status indicator
- Front-panel playback and volume controls
- Aluminum heat sink for efficient cooling
Specifications
| Specification | Value |
|---|---|
| Product Type | Stereo Audio Amplifier Module |
| Model | AP55 |
| Amplifier Output Power | 50W + 50W (Maximum) |
| Amplifier Type | Class-D Digital Amplifier |
| Operating Voltage | 12V – 24V DC |
| Recommended Voltage | 19V – 24V DC |
| Audio Channels | 2 (Stereo) |
| Bluetooth | Yes |
| Bluetooth Version | 5.0 (Model Dependent) |
| USB Support | Yes |
| TF Card Support | Yes (Micro SD) |
| AUX Input | 3.5 mm Audio Jack |
| FM Radio | Yes |
| Supported Audio Formats | MP3, WAV, WMA (Model Dependent) |
| Speaker Impedance | 4Ω – 8Ω |
| Operating Temperature | -20°C to +60°C |
Interface Configuration
| Interface | Description |
|---|---|
| DC Input | 12V–24V DC Power Input |
| USB | USB Flash Drive |
| TF | Micro SD Card Slot |
| Bluetooth | Wireless Audio Input |
| AUX | 3.5 mm Audio Input |
| L OUT | Left Speaker Output |
| R OUT | Right Speaker Output |
| GND | Ground |
| Control Buttons | Volume, Play/Pause, Previous/Next, Mode, Power |
Note: Use a regulated DC power supply capable of delivering 5A or more to achieve the best audio performance.
Applications
- DIY Bluetooth speakers
- Home audio systems
- Car audio systems
- Multimedia speaker projects
- Portable sound systems
- Workshop audio systems
- Educational electronics
- DIY electronics projects
- Audio amplifier upgrades
Advantages
- High stereo output power
- Multiple audio input options
- Bluetooth wireless streaming
- Efficient Class-D amplification
- Compact design with heat sink
- Easy installation
- Clear and powerful sound
Size
| Specification | Value |
|---|---|
| Front Panel Dimensions | Approx. 108 × 30 mm |
| PCB Dimensions | Approx. 90 × 55 mm |
| Heat Sink Height | Approx. 20 mm |
| Weight | Approx. 120 g |
Package Includes
- 1 × Gold AP55 50W + 50W Stereo Audio Amplifier Module
Note: To achieve the maximum output power, use a 19V–24V DC regulated power supply with sufficient current capacity (typically 5A–8A) and connect 4Ω or 8Ω speakers rated appropriately. Actual continuous (RMS) output power depends on the power supply voltage, speaker impedance, and the amplifier IC used on the module. Ensure adequate ventilation around the heat sink during high-power operation.









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