MH-M38 Audio 5W Bluetooth Module with 2 Stereo Amplifier Outputs

The mh-m38 audio bluetooth module with a micro usb connector is an advanced and compact audio receiver that utilizes bluetooth version 4.2, enabling wireless connection to various playback devices such as mobile phones, laptops, and tablets. this bluetooth module is equipped with an internal amplifier that has a power output of 2x5w and can be directly connected to two 4 to 8-ohm speakers without the need for an external amplifier. using a separate amplifier with this module is not recommended, as the internal circuit has a dedicated amplifier, and parallel or combined connections with other amplifiers may damage the chip. power for the module is supplied in two ways: either through a micro usb cable and a 5v2a power source or by directly connecting a 3.7v lithium battery to the vbat and gnd pins.

To achieve the best sound quality, using a stable power supply with high current is recommended. in addition to bluetooth, this module also supports usb sound card functionality, allowing it to be connected to a computer via a usb cable and used for music playback without the need to install drivers. the stereo sound output is provided in two left and right channels and is suitable for diy audio projects, building bluetooth speakers, upgrading portable audio systems, and designing smart home gadgets. this 5-watt stereo bluetooth module with a compact size, optimized energy consumption, and easy installation is considered one of the best options for electronics and audio enthusiasts.

Setting up and using the mh-m38 audio bluetooth module is very simple and quick, requiring only a 3.5mm audio cable and a usb cable for power supply. this module is equipped with bluetooth version 4.2 technology, which enables automatic pairing with music playback devices. it utilizes a powerful csr8670 chip capable of delivering output up to 5 watts. this feature makes the module highly suitable for wirelessly playing music from mobile phones, tablets, or mp3 players that support the a2dp profile.

key applications of the mh-m38 audio bluetooth module

1. power supply and operating current: support for a 5v micro usb cable and a lithium battery of 3.7 to 4.2 volts with a maximum current of 2 amps
2. amplifier output power: internal dual-channel amplifier with 5 watts output for each channel
3. support for bluetooth version 4.2: wireless connection capability with protocols hfp version 1.7, a2dp version 1.2, avrcp version 1.5, and other protocols
4. playable audio formats: lossless decoding of wav, wma, flac, ape, and mp3 formats with stereo dual-channel output
5. bluetooth transmission range: up to 20 meters in an unobstructed environment
6. operating voltage: 5 volts and 3.7 to 4.2 volts range for lithium battery
7. current consumption: standby current of 5.5 ma and operating current of 20 ma
8. stereo audio output: two left and right channels with direct connection to 4 to 8-ohm speakers
9. support for usb sound card: no driver installation required and capability for direct music playback from a computer
10. wide operating temperature: from -40 to +80 degrees celsius
11. receiver sensitivity: -87 dbm

Documents:

MH-M38 Bluetooth Module Datasheet