Audio·Jan 1, 2022

DIY Portable Bluetooth Speaker

Portable Bluetooth speaker built with a Bluetooth audio module, amplifier, battery, and custom enclosure.

Overview

This audio product is a hand-built portable speaker for wireless music playback. It combines a Bluetooth receiver, Class-D amplifier, speakers, rechargeable battery, and enclosure work into a compact device. The project demonstrates audio-module integration, power handling, and practical product finishing.

Specifications

RoleProduct builder and electronics integrator

ModulesBluetooth audio moduleClass-D amplifierSpeaker driversBattery pack

ProtocolsBluetoothAnalog audio

Tech tagsBluetooth AudioClass-D AmplifierBattery PoweredSpeaker Design

Architecture

Bluetooth module receives audio, feeds the amplifier, and the battery system powers the module and speaker drivers.

Project photos

Bluetooth speaker prototype — Bluetooth speaker

Bluetooth speaker build — Speaker build detail

Implementation details

Power

Battery and amplifier power paths are arranged for portable use with attention to charging and runtime.

Components / BOM

Bluetooth audio module, Class-D amplifier, Speaker drivers, Li-ion battery pack, Enclosure

Engineering challenges

Balancing sound quality, enclosure size, battery runtime, and wiring noise was the practical challenge.

Solutions

Integrated standard audio modules with a portable power system and enclosure.

Results & metrics

Completed working Bluetooth speaker prototype.

Future improvements

Add battery level display, USB-C charging, passive radiator tuning, and improved enclosure acoustics.