Hifiberry Amp4 Raspberry Pi Power Amplifier

The Hifiberry Amp4 Raspberry Pi Power Amplifier is a compact Class-D amplifier board that delivers up to 60W of stereo output for Raspberry Pi. Mount it onto the GPIO header of your Raspberry Pi, connect your speakers, and the board turns the Raspberry Pi into a stereo audio system.

Overview

The Hifiberry Amp4 is designed specifically for the Raspberry Pi. A single 12-24V power source can drive both the amplifier and the Raspberry Pi itself, removing the need for multiple power supplies.

Key Features

• Class-D Design: Compact amplification described as delivering clean audio with minimal heat generation and energy consumption.
• Substantial Power Output: Provides up to 60W, capable of driving a wide range of speakers.
• Broad Compatibility: Works with 4-8 Ohm speakers and supports sample rates from 44.1kHz up to 192kHz at 16-32bit.
• Integrated Power Solution: The onboard voltage converter powers the Raspberry Pi, so a separate 5V USB power supply is not required.
• Expandable System: Supports the optional Hifiberry DSP add-on for advanced audio processing and customisation.

Installation and Usage Notes

For optimal performance with 4 Ohm speakers, a 12-20V power supply is recommended. With 8 Ohm speakers, a higher operating voltage within the 12-24V range is advised. The integrated voltage converter is sufficient to power a Raspberry Pi 4, but it is not designed to support additional power-hungry USB devices or hardware drawing significant current from the GPIO 5V rail, as this may cause system instability.

If your audio software does not list the Amp4 as an output option, the Hifiberry DAC+ driver can be used for full compatibility. The listed dimensions are width 2.6, depth 1.35 and height 3.65, with a product weight of 10 g.