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MH-M18/M28/M38 Bluetooth Audio Receiver Module 4.2 Stereo Lossless Decoding DIY Speaker Mod
MH-M18/M28/M38 Bluetooth Audio Receiver Module Product Overview
The MH-M18/M28/M38 Bluetooth Audio Receiver Module series is a low-power Bluetooth audio receiver module supporting Bluetooth 4.2 transmission with dual-channel stereo lossless playback. The MH-M18/M28/M38 Bluetooth Audio Receiver Module enables fast wireless audio transmission once connected via Bluetooth, with a range of up to 20 meters in open environments. The MH-M18/M28/M38 Bluetooth Audio Receiver Module series offers three versions—M18, M28, and M38—optimized for different application scenarios and functional requirements. The MH-M18/M28/M38 Bluetooth Audio Receiver Module is widely used in Bluetooth audio reception and DIY speaker modifications.
MH-M18/M28/M38 Bluetooth Audio Receiver Module Key Features
Bluetooth 4.2 Version: The MH-M18/M28/M38 Bluetooth Audio Receiver Module supports HFPV1.7, A2DPV1.2, AVRCPV1.5, AVCTPV1.2, AVDTPV1.2 Bluetooth protocols.
Lossless Audio Decoding: The MH-M18/M28/M38 Bluetooth Audio Receiver Module supports WAV/WMA/FLAC/APE/MP3 lossless decoding with stereo dual-channel output.
Three Models Available: The MH-M18/M28/M38 Bluetooth Audio Receiver Module series includes M18 (Basic/SMD version), M28 (Headphone jack output), and M38 (Built-in 5W+5W amplifier).
Flexible Power Supply: The MH-M18/M28/M38 Bluetooth Audio Receiver Module supports 5V Micro USB power and 3.7V-4.2V lithium battery power.
Ultra-Low Power Consumption: The MH-M18/M28/M38 Bluetooth Audio Receiver Module features broadcast standby of 5.5mA, operating current of 20mA, and deep sleep of only 3μA.
Wide Temperature Range: The MH-M18/M28/M38 Bluetooth Audio Receiver Module operates from -40℃ to +85℃.
High Sensitivity: The MH-M18/M28/M38 Bluetooth Audio Receiver Module achieves receiver sensitivity up to -87dBm.
Transmission Distance: The MH-M18/M28/M38 Bluetooth Audio Receiver Module delivers up to 20 meters transmission range in open environments.
Three Models Feature Comparison
| Feature/Model | M18 (Basic/SMD) | M28 (Headphone Jack) | M38 (Built-in Amp) |
|---|---|---|---|
| Micro USB Power | × | √ | √ |
| Audio Headphone Jack | × | √ | × |
| Built-in Amplifier | × | × | √ (5W+5W) |
| Lithium Battery Power | √ | √ | √ |
| USB Sound Card (Plug & Play) | × | × | √ |
| Volume Memory/Adjustment | √ | × | × |
| MUTE Interface | √ | × | × |
| Button Expansion | √ | × | × |
MH-M18/M28/M38 Bluetooth Audio Receiver Module Applications
The MH-M18/M28/M38 Bluetooth Audio Receiver Module series is widely used for upgrading old speakers to Bluetooth, converting wired speakers into Bluetooth speakers; automotive audio systems for phone music playback; DIY speaker building for quick wireless audio setups; Bluetooth headphone/amplifier modifications; multimedia speakers, smart home audio devices, and various other Bluetooth audio reception applications. The MH-M18/M28/M38 Bluetooth Audio Receiver Module provides a reliable solution for all these wireless audio needs.
MH-M18/M28/M38 Bluetooth Audio Receiver Module Key Advantages
Three Models for Flexible Selection: The MH-M18/M28/M38 Bluetooth Audio Receiver Module offers M18 for cost-conscious DIY enthusiasts, M28 for headphone-output scenarios, and M38 with built-in dual 5W amplifier for direct speaker driving—truly plug-and-play.
Lossless Audio Decoding: The MH-M18/M28/M38 Bluetooth Audio Receiver Module supports mainstream lossless formats like FLAC/APE/WAV with stereo dual-channel output, delivering wired-quality sound.
Ultra-Low Power Design: The MH-M18/M28/M38 Bluetooth Audio Receiver Module features deep sleep of only 3μA and operating current of just 20mA—ideal for battery-powered portable devices.
Wide Voltage Power Supply: The MH-M18/M28/M38 Bluetooth Audio Receiver Module supports 3.7V-5V input, compatible with both lithium batteries and Micro USB for versatile scenarios.
20-Meter Long-Range Transmission: The MH-M18/M28/M38 Bluetooth Audio Receiver Module delivers up to 20 meters in open environments, outperforming similar products.
Industrial-Grade Wide Temperature: The MH-M18/M28/M38 Bluetooth Audio Receiver Module operates from -40℃ to +85℃ for harsh environments.
M38 Built-in 5W+5W Amplifier: The M38 model of the MH-M18/M28/M38 Bluetooth Audio Receiver Module can directly drive two 2-8Ω, 3-5W speakers (4Ω5W recommended) without external amplifier.
M38 USB Sound Card Support: The M38 model of the MH-M18/M28/M38 Bluetooth Audio Receiver Module offers plug-and-play USB sound card functionality, connecting to computer via USB cable for direct audio output.
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FAQ
1. What are the MH-M18 / M28 / M38 Bluetooth Audio Receiver Modules?
The MH-M18/M28/M38 Bluetooth Audio Receiver Module is a low-power Bluetooth 4.2 audio receiver module that supports stereo lossless playback. Once connected via Bluetooth, the MH-M18/M28/M38 Bluetooth Audio Receiver Module enables wireless audio transmission and is widely used in Bluetooth audio receivers and DIY speaker modifications.
2. What are the main differences between M18, M28, and M38?
Key functional differences in the MH-M18/M28/M38 Bluetooth Audio Receiver Module series:
M18 (Basic/SMD version): Volume memory/adjustment, MUTE mute interface, button expansion
M28 (Headphone output): Micro USB power supply, headphone audio output
M38 (Built-in 5W+5W amplifier): Built-in dual-channel amplifier (5W+5W), USB sound card (driver-free), lithium battery support
3. What Bluetooth protocols and audio formats do they support?
The MH-M18/M28/M38 Bluetooth Audio Receiver Module supports Bluetooth V4.2 with protocols including HFP V1.7, A2DP V1.2, AVRCP V1.5, AVCTP V1.2, and AVDTP V1.2. Audio formats supported by the MH-M18/M28/M38 Bluetooth Audio Receiver Module include WAV, WMA, FLAC, APE, MP3 lossless decoding with stereo output.
4. What power supply options are available?
The MH-M18/M28/M38 Bluetooth Audio Receiver Module power options are:
M18: 5V / 3.7V-4.2V (lithium battery)
M28: Micro USB power / lithium battery
M38: Micro USB power / lithium battery / 5V
All three models of the MH-M18/M28/M38 Bluetooth Audio Receiver Module support lithium battery power.
5. What are the power consumption and standby current?
The MH-M18/M28/M38 Bluetooth Audio Receiver Module power consumption specifications:
Unconnected broadcast state: 5.5mA
Connected working state: 20mA
Deep sleep mode: 3µA
6. What is the Bluetooth transmission range and sensitivity?
The MH-M18/M28/M38 Bluetooth Audio Receiver Module delivers transmission range up to 20 meters in open or low-interference environments. The MH-M18/M28/M38 Bluetooth Audio Receiver Module receive sensitivity is -87dBm.
7. What is the operating temperature range?
The MH-M18/M28/M38 Bluetooth Audio Receiver Module operates within a temperature range of -40°C to +85°C.
8. What unique features does the M38 model offer?
The M38 model of the MH-M18/M28/M38 Bluetooth Audio Receiver Module features a built-in 5W+5W dual-channel amplifier for direct speaker driving; supports USB sound card function (driver-free); and supports both Micro USB and lithium battery power.
9. What expansion features does the M18 model support?
The M18 model of the MH-M18/M28/M38 Bluetooth Audio Receiver Module supports volume memory and adjustment, MUTE mute interface, and button expansion for customized control.
10. What applications are these modules suitable for?
The MH-M18/M28/M38 Bluetooth Audio Receiver Module is suitable for various Bluetooth audio receiver devices and speaker DIY modifications, such as converting speakers into Bluetooth speakers, upgrading car audio systems, and DIY portable Bluetooth speakers. The MH-M18/M28/M38 Bluetooth Audio Receiver Module provides an ideal solution for all these wireless audio applications.
- Model:
- MH-M18 / M28 / M38
- Bluetooth Version:
- 4.2
- Supported Protocols:
- HFPV1.7、A2DPV1.2、AVRCPV1.5、AVCTPV1.2、AVDTPV1.2
- Audio Decoding:
- WAV/WMA/FLAC/APE/MP3
- Audio Output:
- Stereo Dual Channel
- Operating Voltage:
- 3.7V-5V
- Standby Current:
- 5.5mA
- Operating Current:
- 20mA
- Sensitivity:
- -87dBm
- M38 Amp Output:
- 5W + 5W
