The MH-M38 Bluetooth Audio Receiver & Amplifier Module is an "all-in-one" wireless sound solution. At Electrapac, we recommend this module for users who want to build a high-quality Bluetooth speaker with the absolute minimum number of components.

Product Overview

The MH-M38 is a highly integrated Bluetooth 4.2 module that combines a wireless receiver and a 5W + 5W dual-channel amplifier on a single tiny PCB. It is unique because it can be powered directly via a Micro-USB cable or a 3.7V Lithium battery, making it the ultimate choice for portable "boombox" projects.

Key Features for Electrapac Customers

• Lossless Audio Transmission: Supports high-quality Bluetooth protocols to ensure your music retains its clarity and depth without the "hiss" found in cheaper modules.

• Direct Battery Support: Features dedicated solder pads for a 3.7V Lithium battery. It is designed to work efficiently with the variable voltage of a discharging battery.

• Onboard Amplifier: No need for an external PAM8403 or PAM8610 board. Simply connect your speakers directly to the module and start playing.

• Status LED Indicator: Includes a built-in blue LED that flashes during pairing and stays solid when a connection is successfully established.

• Universal Compatibility: Pairs instantly with Android, iOS, Windows, and macOS devices.

Wiring & Setup Guide

For a successful build from www.electrapac.com, follow these simple steps:

1. Speaker Connection: Solder your Left (L) and Right (R) speakers to the output pads. For best results, use 4-ohm 5W speakers.

2. Power Connection: * Option A: Plug in a standard 5V Micro-USB phone charger.

   • Option B: Solder a 3.7V Li-ion battery (like an 18650) to the VBAT (+) and GND (-) pads.

3. Pairing: Turn on your phone's Bluetooth and search for "MH-M38". Click connect, and you are ready to stream!

Warning: Do not use a high-voltage power supply. Exceeding 5.5V will immediately damage the integrated circuit.

Ideal For:

• Custom Bluetooth Speakers: Build a unique wooden or 3D-printed speaker case.

• Vintage Radio Retrofitting: Give your old analog radios a second life with wireless connectivity.

• Car Audio Aux Upgrade: Add Bluetooth capability to older car stereos that have a 5V power source.

• Portable Sound Systems: Lightweight and efficient for hiking or outdoor use.

Why Shop at Electrapac?

We curate reliable MH-M38 modules that offer stable Bluetooth pairing and genuine 5W output. Find this module, matching 5W speakers, and 18650 batteries at www.electrapac.com.