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RME ADI-2 DAC FS Ultra-Fidelity PCM/DSD 768 kHz DA Converter

BH #RMADI2DACFS • MFR #ADI2 DAC FS
RME ADI-2 DAC FS Ultra-Fidelity PCM/DSD 768 kHz DA Converter
Key Features
  • Studio-Quality 2-Channel USB DAC
  • High-End Headphone Amplifier
  • S/PDIF & ADAT Playback
  • DSD up to 768 kHz / DSD256
The RME ADI-2 DAC FS is a two-channel digital-to-analog converter for the discerning audiophile or engineer. It offers 32-bit conversion up to 768 kHz, making it compatible with high-resolution PCM formats and even DSD256. Additionally, the ADI-2 is compatible with iOS devices with apposite adapters, so you can enjoy audio streamed off your tablet or iPhone in a high-quality manner.
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RME ADI2 DAC FS Overview

  • 1Description
  • 232-Bit / 768 kHz Converter
  • 3Powerful DSP
  • 4Easy to Operate
  • 5Digital Inputs
  • 6A Panoply of Outputs
  • 7Level Settings
  • 8Steady Clocking

The RME ADI-2 DAC FS is a two-channel digital-to-analog converter for the discerning audiophile or engineer. It offers 32-bit conversion up to 768 kHz, making it compatible with high-resolution PCM formats and even DSD256. Additionally, the ADI-2 is compatible with iOS devices with apposite adapters, so you can enjoy audio streamed off your tablet or iPhone in a high-quality manner.

For connections, the ADI-2 DAC FS offers stereo RCA outputs, stereo XLR connections, a 1/4" headphone output, and a low-noise IEM output. You can feed digital signal to the unit over USB, S/PDIF coaxial, S/PDIF Optical, or ADAT.

The built-in headphone amplifier provides low THD values even with 32- or 16-Ohm headphones, ensuring a transparent and crystal-clear sound. Onboard DSP allows you to dial in crossfeed, or instantiate a precise EQ for your exact predilections. This DSP also offers other features, such as a loudness contour reminiscent of old HiFi systems, and M/S encoding or decoding.

A high-resolution graphical operation surface makes operating the unit a breeze, as do the three push-button encoders and four dedicated-menu buttons. Included with the ADI-2 DAC FS are a remote control, an external power supply, a power cord, and a USB cable.

32-Bit / 768 kHz Converter

The ADI-2 DAC is a 2-channel digital to analog converter in a half-rack enclosure. 32-bit / 768 kHz converters offer a signal to noise ratio up to 120 dBA.

Powerful DSP

Powerful, built-in DSP adds useful audio processing, including a 5-band parametric EQ, fast Bass/Treble adjustment, Crossfeed, Loudness control, and more.

Easy to Operate

Operation is quick and easy through three encoders, with push-button functionality, as well as four buttons to access dedicated menus. The unit remembers all current settings, even the menu position.

Digital Inputs

Class Compliant UAC 2 enables up to 768 kHz sample rate on an iPad. The same is available on computers for high resolution of PCM, DXD, and DSD at up to 768 kHz / DSD256. SPDIF coaxial and optical can be used alternately. SPDIF optical also supports two channels of ADAT operation, at up to 192 kHz.

A Panoply of Outputs

The balanced and unbalanced outputs are fitted with both XLR and RCA jacks. The unit uses a fully-balanced and DC-coupled circuit design. The Extreme Power headphone output provides reference-grade sound and headroom. RME's IEM output offers low-noise operation for today's super-sensitive in-ear monitors.

Level Settings

To maintain the full dynamic range within the best operating level, discrete 4-stage reference-level settings were utilized (-5, +1, +7, +13 dBu). The digital volume control of the ADI-2 DAC operates distortion free over a range of 190 dB, staying out of the sound's way.

Steady Clocking

RME's SteadyClock FS performs in all clock modes. Thanks to highly-efficient jitter suppression, the DA-conversion always operates on a high sonic level, being completely independent from the quality of the incoming clock signal.

RME ADI2 DAC FS Specs

Converter TypeAD/DA Converter
Number of Channels2
Connectivity
Analog Audio I/O2 x XLR 3-Pin Balanced Output
1 x Stereo RCA Coaxial Unbalanced Output
1 x 1/4" TRS Headphone Output
1 x 1/8" / 3.5 mm Headphone Output
Digital Audio I/O1 x RCA Coaxial S/PDIF / AES3 Input
1 x TOSLINK Optical S/PDIF / ADAT Input
Host Connection / USB1 x USB Type-B (USB 2.0)
Sync I/ONone
Network I/ONone
MIDI I/ONone
Performance
Frequency ResponseAnalog Outputs:
0 Hz to 20.2 kHz +0/-0.1 dB (at 48 kHz)
0 Hz to 44.9 kHz +0/-0.5 dB (at 96 kHz)
0 Hz to 88 kHz +0/-1 dB (at 192 kHz)
0 Hz to 115 kHz +0/-1 dB (at 384 kHz)
0 Hz to 109 kHz +0/-3 dB (at 768 kHz)
Maximum Output LevelXLR Outputs:
+19 dBu at 0 dBFS (Switchable)
+13 dBu at 0 dBFS (Switchable)
+7 dBu at 0 dBFS (Switchable)
+1 dBu at 0 dBFS (Switchable)
RCA Outputs:
+13 dBu at 0 dBFS
1/4" Outputs:
+22 dBu at 0 dBFS
1/8" / 3.5 mm Headphone Outputs:
-3 dBu at 0 dBFS
Headphone Output Power1/4": 1.5 W per Channel (Max, 0.001% THD)
1/8" / 3.5 mm: 40 mW per Channel into 8 Ohms (Max, 0.001% THD)
ImpedanceXLR Outputs:
200 Ohms (Balanced)
100 Ohms (Unbalanced)
1/4" Headphone Outputs:
0.1 Ohms (Unbalanced)
SNRXLR Outputs:
117 dB RMS (Unweighted, at +19 dBu)
120 dBA (A-Weighted, at +19 dBu)
115.4 dB RMS (Unweighted, at +1 dBu)
118.9 dBA (A-Weighted, at +1 dBu)
RCA Outputs:
117 dB RMS (Unweighted, at +13 dBu)
120 dBA (A-Weighted, at +13 dBu)
114 dB RMS (Unweighted, at +1 dBu)
116 dB RMS (Unweighted, at +7 dBu)
117 dBA (A-Weighted, at +1 dBu)
119 dBA (A-Weighted, at +7 dBu)
109 dB RMS (Unweighted, at -5 dBu)
113 dBA (A-Weighted, at -5 dBu)
1/4" Outputs:
117 dB RMS (Unweighted, at +22 dBu)
120 dBA (A-Weighted, at +22 dBu)
116 dB RMS (Unweighted, at +7 dBu)
119 dBA (Unweighted, at +7 dBu)
1/8" / 3.5 mm Headphone Outputs:
115 dB RMS (Unweighted, at -3 dBu)
118 dBA (A-Weighted, at -3 dBu)
THDXLR Outputs:
-112 dB / 0.00025% (at -1 dBFS)
-116 dB / 0.00016% (at -4 dBFS)
RCA Outputs:
-112 dB / 0.00025% (at -1 dBFS)
-116 dB / 0.00016% (at -4 dBFS)
1/4" Outputs:
-110 dB / 0.0003% (at +18 dBu)
-110 dB / 0.0003% (at +14 dBu)
THD+NXLR Outputs:
-110 dB / 0.00032% (at -1 dBFS)
RCA Outputs:
-110 dB / 0.00032% (at -1 dBFS)
1/4" Outputs:
-107 dB / 0.00045% (at +18 dBu, 32-Ohm Load)
Channel SeparationAnalog Outputs:
> 120 dB
Digital Audio
Sample RatesInternal:
44.1 to 768 kHz
External:
44.1 to 200 kHz
Sync SourcesInternal, S/PDIF
ClockingLock Range: 44 to 200 kHz
Jitter Suppression: > 50 dB (2.4 kHz)
Compatibility
OS CompatibilityWindows 7 or Later
macOS 10.6 or Later
iOS 7 or Later
*As of November, 2021: check with manufacturer for the most up-to-date compatibility
Processor RequirementIntel Core i3
Required HardwareAvailable USB 2.0 Port (USB 3.0 / 3.1 Gen 1 Port, or)
Dock to USB Adapter 30-Pin, Lightning to USB Adapter (or)
Power
AC Input Power100 to 240 VAC, 50 / 60 Hz
AC/DC Power Adapter12 VDC at 2 A
Current Consumption570 mA (Idle)
Power Consumption120 mW (Standby)
7 W (Idle)
18 W (Maximum)
Physical
Operating Humidity0 to 75%
Operating Temperature41 to 122°F / 5 to 50°C
Dimensions8.5 x 5.9 x 2" / 21.5 x 15 x 5.2 cm
Weight2.2 lb / 1.0 kg
Packaging Info
Package Weight4.5 lb
Box Dimensions (LxWxH)13.75 x 8.5 x 3.34"

RME ADI2 DAC FS Reviews

Incredible piece of engineering

By Siavash
Rated 5 out of 5
Date: 2022-07-12

I've only used it as a headamp so far, but given how precisely this was made, I imagine it would be just as great as a DAC. The sound is crisp without being overly analytical. Warmer than I'd expected with richness in the lower frequencies. Beautiful display. There are a few competitors with slightly better objective performance, but it's all sub-audible. This one blows them away in features.

I Don't See What The Fuss Is About

By Dominick
Rated 3 out of 5
Date: 2021-12-19

Sure the ADI-2 fs has legions of fans it seems but going head to head with my old Peachtree DACitx I couldn't honestly hear a difference. I tried different settings but if there was a difference it was barely perceptible. Add to that the convoluted menu navigation and it's small size and weight (may be a plus for some) but for me it has to be held with one hand to make any adjustments or it will just slide back. I guess it would be great for the geeks who like to constantly tweak or play with EQ. I'm not a huge headphone guy but none of my other equipment has a headphone jack so that may come in handy at some point. I do like the Bass and Treble controls. It's nice to boost either or for certain recordings. I was thinking this would be my last DAC purchase but probably not. I will go for a full sized unit next time. Maybe an R2R design.

Perfect device for my listening pleasure!!!

By Jeffrey
Rated 5 out of 5
Date: 2021-10-22

I got this as an upgrade to the iFi Zen DAC and WH-1000XM4 combination. I paired it up with some Focal Radiance cans and I couldn't be happier!!! I bought this DAC for its versatility and I LOVE all the options available. As many YouTube reviewers have said, the menu getting to those options is rough, but once you get your settings dialed, in you don't touch them anyway. The EQ let me dial the bass, mids, and treble just like I wanted them. Once the Radiance's burned in, the sound was incredible. But I found myself looking for even more enhancement and I found it in the roon audio player. I had been using Audirvana and was instantly blown away at how much better roon sounded. I subscribed right away and anyone reading this should too. So I got three upgrades to my previous setup in less than a week. This DAC easily blows away the Zen DAC in sound quality with more options. The Radiance cans have so much clarity over the XM4's I was using and roon was the finishing touch. This is my first DAC near this price point and I can't recommend it enough!!!

Great upgrade!

By Thomas
Rated 5 out of 5
Date: 2021-10-17

I went down a rabbit hole a little bit. Originally I was looking to purchase a replacement for my well-loved and well-used Sennheiser HD 650 headphones, and I thought the Sennheiser HD 850S would be just the thing. I still think they are in my future. However, reading up on those cans I learned they are very dependent on good DAC and good amplification. I use my headphones primarily for listening to music on my iMac, and I had been using an old DragonFly Black for years. That would certainly have to be upgraded, so on I turned my attention to headphone DAC/amp combinations. Desk space is limited, so an all-in-one unit was my preference. After considering the whole range of products, I am glad a settled on the RME ADI-2 FS. I really have it only for casual music listening at the computer, although the listening is becoming much less casual than before. I find my self often immersed in the music. So multi-taskers, beware! The sound this thing produces is wonderfully crisp, clean, detailed and engaging. I have the unit connected to my iMac with the provided USB cable. There are quite a lot of settings you can use to achieve different acoustic results, but so far I have pretty much stuck to the basic configuration as delivered. It comes with a well written 70 page manual in English, with another 70 pages in German, so there are lots of capabilities a serious user can play with. The only modifications I have made so far, other than updating the firmware, has been to introduce the slightest bit of crossfeed. I think it's a great feature. One thing I should mention is that initially I was somewhat disappointed with the sound until I figured out that my 300 ohm headphones do much better with the Hi-Power setting turned on. My final comment has to do with considering this unit vs the RME ADI-2 DAC PRO. One of the many reviewers I read noted that unlike many modern tech products, such as iPhones, which use the Pro designation to denote an upgraded version, with this unit, the Pro is actually for people that need to use it like a professional might. It has another entirely discrete second channel, and a great deal more complexity is involved using it. However for listing to music, this unit is every bit as feature rich and sonically excellent as the Pro model, and considerably less expensive.

High tech done right

By Johnny
Rated 5 out of 5
Date: 2021-07-15

This is a great dac with a lot of features and configurations. It may take awhile initially to learn the navigation, but I have been very happy with the sound from both the phono output and line-out to a tub amp. I can trust this dac to give me the best sound regardless of how I choose to it. It may not have a balanced phono output, but don't let that limit you.

Excellent gear!

By Jeffrey
Rated 5 out of 5
Date: 2021-06-02

Even without using the DSP for which this DAC is famous, it has improved my listening life. The headphone preamp is great, drives everything I own except STAX electrostatics, I use the RME line-out switched between powered speakers and a STAX amp for the electrostatic headphones. The menu system has a certain pedantic logic to it, for me it is not at all intuitive, but it doesn't interfere with my ability to enjoy the product.

Great fit for Genelecs

By Brandon
Rated 5 out of 5
Date: 2022-03-29

The DAC and clock in this unit is the best I've heard. They work very well with the 8330a pair w/sub, much better than my Schiit Bifrost 2 did. I'm able to calibrate the Genelecs using GLM for room accuracy, then use the RME to add a bit more base for fun, or easily adjust the panning slightly to compensate for some hearing lose in my right ear. Those functions are much less convenient to access through GLM, but now I can set them with a remote control on the RME.

Solid, well-made unit

By John
Rated 5 out of 5
Date: 2022-01-04

After finding my current DAC doesn't have the best specs I decided to buy this RME ADI-2 based upon a review from audiosciencereview dot com. It appears to be a balanced review site for DACs with lots of measurement data and graphs. Anyway, this ADI-2 unit is German-made and solid, the remote is Chinese-made although of high quality. I can't hear any difference but I haven't done a side-by-side either. Given that I'm running this through Klipsch La Scala's/Cornwalls via McIntosh amps I want the sound as clean as I can get it. I'm happy.

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