RME ADI-2/4 Pro SE

HiFi, DAC
RME ADI-2/4 Pro SE — Big Brother to My Beloved ADI-2

As a devoted RME ADI-2 DAC FS owner, the ADI-2/4 Pro SE is the upgrade path I’ve been eyeing with a mixture of desire and dread — desire for the improved specifications, dread for what it would do to my wallet. This is RME’s flagship: a combined AD/DA converter that’s equally at home in a mastering studio and a high-end listening room.

Build & Design

If my ADI-2 DAC FS is a sports car, the 2/4 Pro SE is the grand tourer. Half-rack size, heavier, and with a comprehensive array of inputs and outputs that reflects its professional heritage. XLR balanced outputs, AES/EBU, ADAT, SPDIF, dual headphone outputs — this is a device designed for professional studios that happens to sound extraordinary for home listening.

The build quality is quintessential German engineering: solid, precise, and unshowy. The IPS display is larger and clearer than my ADI-2’s screen, and the interface is the same excellent RME design with even more options.

Sound

DAC Performance

Sublime. The SteadyClock FS jitter reduction is audible in a way that surprises even sceptics — the sense of space and stability in the stereo image is a genuine step up from my ADI-2 DAC FS. Resolution is fractionally higher, the noise floor is lower, and the overall presentation has a solidity and authority that reflects the improved power supply and output stage.

Headphone Output

Both headphone outputs are exceptional. The IEM output handles sensitive in-ears without hiss, whilst the full-size output drives my HD600 with more authority than the ADI-2 DAC FS manages. It doesn’t quite match the Sparkos Gemini’s tube warmth, but for a DAC’s built-in headphone amp, it’s reference-calibre.

Features

Everything the ADI-2 DAC FS offers, plus AD conversion, more routing options, and improved specifications across the board. The parametric EQ, crossfeed, and loudness features are all present and refined.

Comparisons

Against my ADI-2 DAC FS, the improvement is real but incremental. You’re paying roughly double for perhaps 15-20% improvement in technical performance. Whether that’s worthwhile depends entirely on your standards and budget. Amir at ASR measured both units with spectacular results, with the 2/4 Pro SE holding a slight edge in most parameters.

For someone building a system from scratch at this budget, the ADI-2/4 Pro SE is the obvious choice. For ADI-2 DAC FS owners like me, it’s a tempting but not essential upgrade.

Verdict

Pros

  • Reference-grade conversion quality
  • Comprehensive professional connectivity
  • Outstanding headphone outputs
  • RME’s feature-rich interface

Cons

  • Expensive — diminishing returns over ADI-2 DAC FS
  • Professional features overkill for pure home use
  • Larger footprint than the ADI-2 DAC FS
  • AD conversion wasted if you don’t record

Ratings:

  • Build & Design: 9 / 10
  • Sound: 9.5 / 10
  • Features: 10 / 10
  • Value: 7 / 10

The ADI-2/4 Pro SE is the finest piece of audio equipment I’ve used. Whether you need it over the ADI-2 DAC FS is the only question.