CT14 5W+5W Micro USB 4.2 Stereo Bluetooth Power Amplifier Board

CT14 5W+5W Micro USB 4.2 Stereo Bluetooth Power Amplifier Board is an ultra-compact, highly efficient wireless audio amplification module perfectly tailored for DIY audio enthusiasts and custom speaker upgrades. This module integrates a modern Bluetooth 4.2 receiver alongside a dual-channel Class F audio amplifier capable of delivering clean 5W + 5W stereo performance. Consequently, you can easily build or refit idle sound boxes into portable Bluetooth speakers without managing complex component wiring. The design conveniently accepts power directly from a standard 3.7V lithium-ion battery or a 5V DC source via its integrated Micro USB port. Furthermore, the onboard charging circuitry allows you to charge your connected lithium battery seamlessly during playback. Therefore, integrating the CT14 board into your portable electronics projects ensures a reliable, space-saving, and cable-free audio solution.

Key Features:

• High-Efficiency Class F Amplifier: Delivers robust 5W + 5W stereo output with minimal thermal accumulation, optimizing battery life for portable setups.
• Onboard Micro USB Charging: Features an integrated current-limiting charging circuit that replenishes a connected 3.7V lithium battery while supplying operational power.
• Seamless Bluetooth 4.2 Core: Guarantees a stable, high-fidelity wireless connection spanning a distance of up to 15 meters in open spaces.
• Pre-Wired Harness Compatibility: Eliminates tedious surface-mount soldering by utilizing simple JST-style plug-and-play pin connectors for power and speakers.
• Intelligent Power Saving: Shuts down the module automatically after 10 minutes of inactivity in standby mode, safeguarding battery reserves.

Technical Specifications:

• Bluetooth Protocol Version: v4.2 (Device Broadcast Name: DW-CT14+ or JZ-B5W2)
• Output Power Channel Configuration: 5 W + 5 W Stereo (Dual Channel)
• Operating Supply Voltage Range: 3.7 V DC to 5 V DC
• Maximum Working Current: 2 A (Recommended power supply: 5V 2A for optimal fidelity)
• Supported Speaker Impedance: 2 Ω to 8 Ω (Recommended 4 Ω)
• Signal-to-Noise Ratio (SNR): ≥ 90 dB
• Total Harmonic Distortion (THD): ≤ 0.1% at 1 kHz

Mechanical Specifications:

• Circuit Board Construction: Single-sided rigid FR4 PCB
• Interface Ports: 1 x Female Micro USB input, 3 x JST-PH vertical pin headers
• Mounting Integrity: Lightweight architecture suitable for adhesive mounting or custom enclosures
• Antenna Architecture: Trace-etched PCB inverted-F wireless antenna

Dimensions:

• Board Length: ≈ 41.0 mm
• Board Width: ≈ 20.0 mm
• Profile Height: ≈ 11.5 mm
• Module Net Weight: ≈ 15.0 g

Pinout and Wiring:

• Micro USB Port (5V): Connects directly to any stable 5V USB power adapter or PC peripheral port for device operations.
• BAT+ / BAT- Header: Interfaces with a 3.7V lithium-ion battery (Note: The lithium battery must possess an integrated protection circuit board).
• L OUT+ / L OUT- Header: Connects to the primary terminals of your left audio channel speaker (3W to 10W rated).
• R OUT+ / R OUT- Header: Connects to the primary terminals of your right audio channel speaker (3W to 10W rated).
• Wiring Precaution: However, you must never connect the negative speaker terminals together or bridge the outputs in parallel, as doing so will permanently destroy the amplifier chip.

Datasheet Reference:

• Download CT14 Bluetooth 4.2 Stereo Audio Amplifier Module Datasheet

Commonly Used in:

• Custom Bluetooth Speakers: Serves as the fundamental power electronics platform for building personalized boutique desktop speaker systems.
• Vintage Audio Retrofitting: Breathes new life into antiquated analog radios and standalone boomboxes by adding wireless functionality.
• Desktop Multimedia Stations: Drives small-scale computer monitor speakers while relying on an incredibly compact desktop footprint.

Applications:

• DIY Wireless Audio: Powering compact acoustic chambers for custom hobbyist builds.
• USB Sound Card Audio: Operating as a plug-and-play driverless external USB sound card when paired with compatible OS environments.
• Portable Boomboxes: Providing efficient, dual-channel audio distribution for travel-ready, lithium-powered systems.

Equivalent Models:

• MH-M28 Audio Module: A popular alternative boasting Bluetooth 4.2 decoding capability, however, it lacks the integrated high-power Class F speaker amplifier circuit.
• XY-P15W Amplifier Board: An alternative module that offers a wider operating voltage and Bluetooth 5.0, though it excludes an onboard lithium charging interface.
• DW-CT14+ v1.6 Board: An earlier layout iteration within the identical core chipset family featuring closely matched performance parameters.

Package Includes:

• 1 x CT14 5W+5W Micro USB 4.2 Stereo Bluetooth Power Amplifier Board
• 3 x JST-PH Pre-Terminated Connector Cable Assemblies