HiFiBerry makes Raspberry Pi audio add-ons for projects ranging from a network music player to an amplifier for existing passive speakers. I still see it as a fantastic way to explore DIY audio, especially when you enjoy choosing software and building around equipment you already own. The useful starting point is the connection your speakers or amplifier need, because a DAC, a digital interface and a power amplifier do different jobs.
A Raspberry Pi runs an operating system and playback applications; the selected sound board provides the supported audio interface. Buying a board does not automatically provide every streaming service, multi-room feature or recording input. Choose the Pi, audio hardware, power supply, enclosure and software as a complete system.
Choose the Right Audio Interface
| Type or example | Purpose | Check before buying |
|---|---|---|
| DAC, such as DAC2 Pro | Analogue line output to a suitable amplifier or active speakers; DAC2 Pro also has a headphone output. | Required connectors, level control and exact board capabilities. |
| Digital interface, such as Digi2 Pro | Optical or coaxial S/PDIF to equipment that already performs conversion/amplification. | Receiver inputs and supported sample rates. |
| DAC/amplifier, such as Amp2 or Amp4 Pro | Conversion plus amplified outputs for suitable passive speakers. | Speaker impedance, power arrangement and software driver. |
| DSP-equipped arrangement, such as Beocreate | Supported filtering and crossover projects with multiple amplifier channels. | Correct speaker design, board configuration and recovery procedure. |
A line-level RCA socket is not a speaker-power output. An active speaker has its own amplification; a passive speaker needs a suitable amplifier. Likewise, Digi2 Pro's coaxial RCA connection carries digital S/PDIF, not the same signal as a DAC's analogue RCA output. Match the function as well as the plug shape.
HiFiBerry's DAC2 Pro datasheet confirms the line and headphone connections, hardware volume control and optional DSP expansion. Its Digi2 Pro datasheet warns that a receiving DAC may not support higher rates through TOSLink. The advertised 192 kHz capability is not proof that every downstream device or recording uses that rate.
Amp2 and Amp4 Pro Are Separate Boards
The Amp2 datasheet describes a stereo DAC/amplifier with up to 2 × 30 W advertised output and audio support up to 192 kHz/24-bit. Its detailed output figures depend on supply voltage, speaker load and the distortion condition. “60 W” is not a promise of 60 W per channel, constant power draw or clean maximum output under every arrangement.
For example, that datasheet gives typical per-channel output of 14 W at 12 V into 4 Ω with THD+N below 0.1%, rather than applying its headline maximum to that condition. This is a manufacturer specification example, not our listening test. Choose sufficient usable output for the speakers and room rather than comparing wattage without its conditions.
The Amp2 product guidance specifies 4–8 Ω speakers and recommends 12–18 V for 4 Ω, with higher voltages only for the documented suitable load. Its datasheet recommends 12–20 V and identifies 24 V as the absolute maximum. Use the current board-specific guidance and a suitable regulated supply; do not treat the maximum as a target for every speaker.
Amp4 Pro adds a dual-domain clock circuit and a documented 5 V output capability up to 5 A. The Amp4 Pro datasheet gives its separate specification. HiFiBerry's launch explanation distinguishes its supply capability from Amp2/Amp4. Those differences matter for a Pi with additional peripherals; they do not establish that Pro will sound better to every listener.
Power, Mounting and Pi Compatibility
The Amp2's external supply powers both the amplifier and Pi, so its normal arrangement does not require an additional 5 V Pi supply. Other board types use different power paths. Confirm voltage, polarity, connector and sufficient current for the whole setup, and follow the exact mounting instructions with power disconnected. A generic recommendation to buy a “clean 5 V” supply is unsuitable for every HiFiBerry amplifier.
Align the header correctly and use the supplied mounting hardware. Check enclosure fit for the Pi revision, board height, cooling and any DSP add-on. A case intended for another generation may not fit, and stacking several unrelated HATs is not automatically compatible just because they use the same header.
HiFiBerry's dated Pi 5 compatibility report lists Amp2 and several DAC/Digi models, with qualifications about drivers and additional USB power. Do not read compatibility as an unlimited peripheral-power budget. Check the current board revision and software support, then test storage and any display under the intended workload.
For Amp2 speaker wiring, use the printed channel and polarity markings and keep loose strands from contacting neighbouring terminals. Its datasheet explicitly prohibits bridging the left and right outputs. Start at a low volume and check both channels before raising it. Speaker power ratings do not mean that operating the amplifier at maximum is always appropriate.
I²S and Sound Expectations
The Pi's digital audio interface communicates with supported boards through the GPIO header. Clocking and driver arrangements differ between models; I²S does not eliminate all jitter, resampling, noise or playback errors. HiFiBerry documents dedicated clock circuitry on particular Pro boards, rather than one identical architecture across its whole catalogue.
There is also no reason to assume every USB DAC or HDMI audio route performs poorly. Compare interfaces by the equipment and software you need. Claims about a universal noise floor, inevitable network-related stutters or reference-grade sound require actual measurements of a specified system, not simply an interface name.
Keep listening preference separate from format support. A high sample-rate specification does not prove an audible improvement for every music file. Speakers, placement, the room, playback level and source material influence the experience. Compare at similar listening levels and use familiar music rather than treating the louder arrangement as automatically better.
Drivers and a Useful First Check
HiFiBerry's Linux configuration guide explains that supported drivers are in the Raspberry Pi kernel but require the appropriate device-tree configuration. It identifies the current Raspberry Pi OS location as /boot/firmware/config.txt, while advising readers to check their own system. Do not copy an older path or one overlay into every distribution.
The March 2024 driver update introduced separate Standard and Pro overlays in Linux 6.1.77 for affected boards, including Amp2. Use current instructions for the kernel and sound card. A distribution's sound-card selector may handle this configuration; preserve a working configuration before manual changes.
For a read-only detection check, the guide uses aplay -l to list playback hardware. A listed board establishes detection, not correct speaker wiring or streaming-service playback. Check the selected output, mixer mute/volume and a known local audio file before investigating internet or multi-room problems. Keep those issues separate so one failed service login does not become an unnecessary hardware replacement.
Software and Project Choices
Raspberry Pi OS with suitable playback software, Volumio, moOde and HiFiBerryOS are options to investigate. Confirm the exact Pi/board support and the functions included in the chosen release or service plan. Spotify, Roon and other services have their own account and software requirements; owning a sound card does not provide a subscription.
HiFiBerry announced in February 2025 that its original Buildroot-based OS would transition to a different approach. Its current Next Generation documentation describes a Debian-based rewrite, installed through packages on Raspberry Pi OS Lite, with separately selectable players. Check those instructions instead of assuming all historical images, recovery options and features apply unchanged to the newer software.
Reviving passive speakers, making a network player and exploring DSP remain appealing projects. Multi-room playback additionally needs compatible server/player software and reliable networking; a board alone does not guarantee perfect synchronization. For a retrofit, begin with ordinary stereo playback before changing crossover or DSP settings, and retain a recoverable configuration.
Is HiFiBerry Worth Considering?
My view remains positive for someone who enjoys DIY audio and wants a flexible Pi-based system. Pair it with suitable speakers, compare software options and allow ventilation. Include the supply, case, storage and cables in the total price before comparing it with a finished streamer.
Choose the board by the connection and project you actually need, then validate playback and maintenance in that arrangement. That makes HiFiBerry an enjoyable and useful addition without promising that every board outperforms every commercial product. Visit the official HiFiBerry Website.
