Bring your DIY audio projects to life with this compact and powerful Bluetooth amplifier. The CT14 Micro 4.2 is a plug-and-play stereo amplifier module that delivers excellent audio performance in a space-saving design.
✅ Key Features
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Bluetooth 4.2 Connectivity – Seamlessly pairs with smartphones, tablets, and other Bluetooth devices.
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Auto-Reconnect – Remembers and automatically reconnects to previously paired devices.
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Stereo Output (5W + 5W) – Dual Class-F amplifiers deliver clear, balanced sound for two 4Ω speakers.
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USB Audio Support – Functions as a driver-free USB sound card when powered via micro USB.
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Battery Charging Port – Supports 3.7V lithium batteries and charges them through the USB interface.
⚙️ Specifications
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Bluetooth Version: 4.2
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Output Power: 5W + 5W
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Speaker Load: 2–8 Ω (recommended: 4 Ω)
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Power Supply: 5V ≥2A via USB or 3.7V Li-ion battery
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Bluetooth Range: Up to 15 meters (open space)
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Dimensions: ~41 × 20 × 11.5 mm
🛠️ Important Usage Notes
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Use a regulated 5V ≥2A power supply or a protected 3.7V Li-ion battery.
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Do not use power banks or unstable sources, as they may damage the board.
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Do not connect the speaker outputs together—this can permanently damage the amplifier.
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Keep the Bluetooth antenna area clear of metal for optimal signal strength.
🎯 Ideal For
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DIY Bluetooth speakers
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Audio upgrades for small enclosures
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Embedded furniture sound systems
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Educational electronics kits
📦 What’s Included
