How to Build a Low‑Cost Raspberry Pi Office HiFi System

Hardware Overview

The solution uses a single-board computer (Raspberry Pi) as the audio server, a HiFiBerry Amp board that combines a class‑D amplifier with a built‑in DAC, and a pair of Audioengine P4 active speakers. The Pi provides a low‑cost, low‑power platform; the HiFiBerry Amp supplies line‑level output and 5 V power to the speakers, eliminating the need for a separate external amplifier. The Audioengine P4 speakers are full‑range active units, so no additional amplification is required.

Amplifier and Speakers Details

HiFiBerry Amp – a Raspberry Pi HAT that integrates a 50 W class‑D amplifier and a 24‑bit DAC. Although the model has been discontinued, its 48 kHz/44.1 kHz sampling rate is sufficient for typical office environments where the acoustic difference between 48 kHz and higher rates is inaudible.

Audioengine P4 – compact bookshelf speakers with built‑in amplification. They deliver clear sound across the office space and can be driven directly from the HiFiBerry Amp without distortion.

Software Stack

Raspberry Pi OS (formerly Raspbian) is used as the base operating system because it provides a regularly updated kernel and package repository, reducing the maintenance burden compared with a custom Ubuntu build on a generic ARM SBC. On top of the OS, the open‑source music player Volumio is installed. Volumio turns the Pi into a dedicated audio server with a web‑based UI, automatic updates, and built‑in support for the HiFiBerry Amp.

Installation Procedure

Download the latest Volumio image from the official release page (e.g., https://github.com/volumio/Volumio2/releases).

Write the image to a micro‑SD card using dd or a flashing tool such as Etcher.

Insert the card into the Raspberry Pi, attach the HiFiBerry Amp HAT, connect the Audioengine P4 speakers to the amp’s speaker terminals, and power the system.

Boot the Pi; Volumio will start a Wi‑Fi hotspot (SSID Volumio) for initial configuration.

Connect a client device to the hotspot, open a browser to http://volumio.local, and run the setup wizard.

During the wizard, select HiFiBerry Amp as the audio output device – no manual editing of /etc/volumio/ configuration files is required.

Configure the music library location (e.g., a network‑attached storage (NAS) share mounted via cifs or nfs), then let Volumio scan the collection.

Optionally enable remote control protocols (MPD, AirPlay, Bluetooth) in the Settings panel.

After setup, Volumio can be updated through its web UI; the underlying OS can be upgraded with sudo apt update && sudo apt full-upgrade without affecting the Volumio installation.

Alternative Playback Options

Music on Console (MOC) – a terminal‑based player. After mounting the NAS (e.g., sudo mount -t cifs //nas/music /mnt/music -o user=guest), launch mocp and navigate the library with keyboard shortcuts.

Music Player Daemon (MPD) – runs as a background service ( sudo systemctl enable mpd && sudo systemctl start mpd). MPD can be controlled from any MPD client on Linux, Android, or iOS, providing flexible remote playback control.

Operational Notes

The combination of Raspberry Pi OS and Volumio eliminates the need for custom kernel builds and fragile Python scripts that were required on the previous generic ARM SBC. System stability is achieved by relying on the officially maintained kernel and package repositories. Volume and source selection are handled through the Volumio web UI or any MPD client, allowing multiple users to control playback without interfering with each other. Because the hardware uses a dedicated DAC and amplifier, the audio quality is comparable to a small desktop HiFi system while consuming far less power and space.

Overall, this architecture demonstrates a reproducible, low‑maintenance approach to building an office‑grade HiFi system using readily available components and open‑source software.