The LM4881 Headphone Amplifier Board is a compact, ready-to-use audio amplifier module built around the LM4881 dual headphone amplifier chip. Just connect a DC power supply (3.6V to 12V), feed in an audio signal, and drive your headphones directly — no extra circuitry needed. It can also be used as a pre-amplifier stage in front of a larger power amplifier.

An onboard volume knob lets you adjust the output level, and turning it fully counter-clockwise switches the board off. Audio input and output are connected through simple JST connectors, and a standard 3.5mm jack is provided for plugging in headphones directly.

Key Features

• LM4881 dual headphone amplifier chip — up to 160mW output power
• Wide supply voltage: DC 3.6V–12V (onboard 5V regulator)
• Standard 3.5mm headphone jack output plus 2.54mm pin header output
• Volume adjustment potentiometer with built-in power switch
• JST connectors for audio input, audio output, and power
• Can be used as a headphone driver or as a pre-amplifier
• Compact board: approx. 50mm × 25mm, weight ~20g

Ideal For

• DIY headphone amplifier and portable audio projects
• Adding a headphone output to DIY audio builds
• Pre-amplifier stage before a power amplifier board
• Arduino / Raspberry Pi audio output projects
• Students, hobbyists, and audio electronics labs

Specifications

• Amplifier chip: LM4881
• Operating voltage: DC 3.6V–12V
• Maximum output power: 160mW
• Output: 3.5mm headphone jack + 2.54mm pin header
• Control: volume knob with on/off switch
• Board size: 50mm × 25mm
• Weight: approx. 20g

Package Includes

• 1 x LM4881 Headphone Amplifier Board