Amplifier Review DAC & DAP Review Streaming & Digital Review

Uniti Atom From Naim: All For One…?

Is the Unit Atom just a streamer or actually an all-in-one hi-fi system? Paul Rigby rushed to add a pair of speakers to complete his review

Naim’s earlier array of streamers and all-in-ones – replete with their large chassis forms – were recently replaced with a neater and more approachable design. Here, in this way, the Unit Atom replaces the UnitiQute 2.

UNITI ATOM From Naim: One For All!

The Uniti Atom itself is a tidy, meaty, hefty, relatively small footprint bundle of fun with enough flashing lights, buttons and gizmos to deserve a permeant installation place in The Chocolate Factory owned by one, William (Bill to his mother) Wonka. I mean to say, who won’t have fun merely turning the dinner plate-sized volume dial (dial? wheel more like) on the top of the chassis and then saying to themselves ever so quietly, “Warp Factor 5 Mr Sulu.” I know I did, until the tablets kicked in. Many will spend minutes turning this dial without playing any music until they snap out of it.

UNITI ATOM From Naim: One For All!

Then there’s the colour LCD panel on the front and a nicely sized 127mm screen it is too. It displays a host of information including album art and includes proximity sensors which means that it will ‘wake up’ as you approach it.

I have to say that the first thing I did when I saw this presentable screen was touch it and was disappointed to find out that it didn’t respond. The larger the screen, the more justification of making it touch-enabled. I reckon this Naim example should have been such.

UNITI ATOM From Naim: One For All!

Next to that is a headphone port (3.5mm, I would have preferred full size socket for this unit) and a USB socket. Here, you can plug in a HD drive and USB stick full of media.

UNITI ATOM From Naim: One For All!

The Naim also supports built-in Google Chromecast (up to 24bit/96kHz from a tablet or phone), Tidal, Spotify Connect and Internet radio plus AirPlay and Bluetooth aptX HD. Generally, PCM supports up to 32bit/384kHz while DSD supports up to DSD128. To stick with DSD128 was a poor decision – DSD256 should have been a base line figure for the Atom, I think the price warrants it.

Inside the chassis you’ll find a 40W A/B amplifier that has history. Apparently, it derives form the company’s Nait amplifiers.

UNITI ATOM From Naim: One For All!

On the rear is a IEC power cable slot, to enable you to upgrade your own power cable if you wish. Naim does offer a more than capable Powerline Lite cable, though, which will be more than enough for most users. You’ll also find speaker terminals, USB and Ethernet networking socket. Two optical and one coaxial digital inputs sit above pre-amp analogue outputs. There’s also a pair of inputs. Hence, you could, if you wish, plug in a phono amp to support a turntable. A “galvanically isolated” HDMI socket can be installed by Naim for an extra £100.

UNITI ATOM From Naim: One For All!

Control resides with on-unit buttons, a supplied remote – which is nicely designed and fits well with the chassis in terms of the ‘look’ – plus an app.

UNITI ATOM From Naim: One For All!

The Unit Atom provides plenty of options. Yes, you can use it as part of a 2 channel system but you can also install it as a hub of a multi-room system, to play music all over the house.

UNITI ATOM From Naim: One For All!

Spanning 95 mm x 245 mm x 265mm, the Naim weighs in at a secure 7kg.


I begin with Bob Marley’s I Shot the Sheriff via my Red Wine-modded Astel&Kern AK120, running at 24bit/96kHz.

I was impressed by the general sound quality of the Naim which will bother even more expensive ‘proper’ – as it where – separates hi-fi systems. Yes, there is a crisp, solid state-esque, very precise manner to the upper mids but there is also plenty of space and air in this area too which allows the Naim to successfully excavate heaps of detail. While the Naim might ultimately lack an ultimate push in terms of dynamic extension when compared to much more expensive kit, to point an accusing finger at this stage would be wholly churlish. At this price point, the Naim’s midrange shown here by the vocals (lead and backing), rhythm guitar and parts of the organ, were impressive by their coherence.

UNITI ATOM From Naim: One For All!

Bass, meanwhile, was both characterful and focused in its presentation but never suffered from blooming. There was a distinct logicality in terms of the lower frequency, the Naim never lost control or wandered around in a confused state, which all-in-one system can produce at times.

I then plugged in a USB stick packed with trying musical genres and resolution types.

First from this stick was a more dynamic track, Skunk Anansie’s Hedonism at 16bit/44.1kHz, I was impressed by a clean, slightly sparse presentation that sounded efficient and lean, lacking fuss or frippery. This enabled more delicate secondary percussive effects such as the tambourine to be clearly heard while bold noises such as power chords never masked or swamped such sounds. Hence, the music was well ordered and disciplined.

UNITI ATOM From Naim: One For All!

I then moved to jazz at 24bit/96kHz and Sonny Rollins’ St Thomas. Again, there was a lean and clean sense to the music. So, if you wanted, you could hear the drive and the force of the sax and the effort placed behind the reed, the musicality of the piano and the firm foundation of the drums compared with the fragility of the treble from the delicate cymbals taps during the drum solo.

UNITI ATOM From Naim: One For All!

I then turned to Eric Bibb and Meeting the Building, played via a DSD 64 file.

For the price, the Atom provided a clear and open soundstage to allow the many performers a place and room to manoeuvre. So, the host of voices from Bibb’s lead vocal, gospel shouters and a gospel choir, never sounded crowded or ever suffered from midrange smearing. There was a real precision in their vocal deliveries. More, the vast array of instruments that ran beneath these vocal excerpts remain calm, clear and offered a transparency that enhanced the naturalistic and tonally accurate nature of the track.

UNITI ATOM From Naim: One For All!

I then used Chromecast to stream the BBC’s iPlayer and, more specifically, Radio 4 to check the spoken voice abilities of the Atom. In this configuration, voices offered a slight hardening in the upper mids although nothing to cause alarm while accompanying bass frequencies were not only welcome but provided a rich layer to the broadcast.

Playing krautrock legends Can’s Cannonball Noodle from Delay 1968, through Spotify, the Atom offered a fun time of avant beats and exploratory rhythms. The relatively low res stream obviously lost a certain degree of detail but the music remained musical and feet were duly tapped, in any case. That is, the Atom put together an agreeable and entertaining broadcast.

UNITI ATOM From Naim: One For All!

Arguably, the most sonically balanced output from the Atom occurred when I hooked up a turntable, which I did via a phono amplifier and played Ian Dury’s Inbetweenies from the Do It Yourself album. Midrange was super smooth with both vocal and organ/piano flowing with great ease while percussion and guitar was positively lavish in its ability to convey an organic bass response. The low noise response provided an easy and incisive method of accessing subtle details.


If you enjoy a precise solid state sound, a harder hitting output that combines space and breadth of soundstage with focus and discipline and a bass impact that extracts all the detail you’ll ever need, then run and buy this box now. Brilliantly packaged with an easy to use suite of interface options, the Atom deserves to do well and will serve (pun intended) anyone looking for an all-in-one system with years of efficient service.


Price: £1,999 or £2149 (inc HDMI input)

Tel: 01722 426 600

Web: [email protected]

For help with Uniti installation and operation please contact

0333 321 9923 (UK)/+1 800 961 5681 (USA and Canada)

[email protected]

Opening hours: Mon-Sat 8am-7pm and Sunday: 10am-4 pm (GMT/BST)

GOOD: design, interface, analogue out sources, feature count, focus, midrange clarity, bass impact

BAD: solid state sonic personality might not be to everyone’s tastes



Origin Live Sovereign turntable
Origin Live Enterprise 12″ arm
Transfiguration Proteus cartridge
Icon PS3 phono amplifier
Astell&Kern DAP (Red Wine modded)
Aesthetix Calypso pre-amp
Cyrus Lyric all-in-one
Icon Audio MB845 Mk.II monoblock amplifiers
Spendor A1 speakers
Quad ESL-57 speakers with One Thing upgrade
Vertex AQ & Tellurium Q cable

Blue Horizon Professional Rack System

Harmonic Resolution Systems Noise Reduction Components

All vinyl was cleaned using an Audio Desk’s Ultrasonic Pro Vinyl Cleaner

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  • Reply
    15th February 2018 at 3:30 pm

    Hello Paul,

    Very nice review. I find it very ironic you have the best sound with the turntable. But i understand it completely. Not only because it is your preferred way of listening. But i also feel i will have to go back to analogue.

    My current setup is just as you described it with the atom. Clean, crisp, fast, detailed. And a lot of times i really enjoy it. But i often have the feeling i’m missing something. Not with pop and electronic music.

    But with jazz and folk music. It’s absolutely stunning sometimes and with the atom you have all you need in one beautiful box. But you don’t get that je ne sais quoi i suppose. Well actually you can when you add a turntable. So a great all in one solution. Only bananas though…

    Best regards

    • Reply
      Paul Rigby
      15th February 2018 at 3:54 pm

      Thanks for your thought, Geoff – well, hi-fi is such a personal thing. Yes, I found the analogue output the best of the bunch, the rest leans towards a solid state sound but that’s great for many users and I recognise that. I can hear a lot of good things in that approach too. The Atom does a lot of things very well indeed and, for many people, will be the only hi-fi system they will ever need.

  • Reply
    3rd September 2018 at 2:30 pm

    Hi Paul, Thanks for your informative reviews. I have had a demo of the Atom and enjoyed it. I am torn between buying this device or the Moon 240i amplifier. Appreciate you haven’t reviewed the the Moon but I understand it’s the same amp and Dac as the Ace without the network capabilities. Roughly speaking speaking the Atom and 240i are the same price and I am very familiar with the differences in specs and the trade-offs between both e.g built-in phono stage (240I) or streamer (Atom), I was wondering if you could recall if sonically there’s much difference between the two? Reading both reviews and considering the price difference one would assume the Moon would be the better of the two. Unfortunately, I am not able to demo the the 240i easily. Ay thoughts welcomed. Thanks

    • Reply
      Paul Rigby
      3rd September 2018 at 4:59 pm

      Thanks for your question, Andy. You’re right, I’d probably go for the Moon if faced with a choice between the two. I enjoyed the sonic balance of the Moon.

  • Reply
    Kevin Smith
    22nd September 2018 at 7:28 pm

    I purchased the Atom…& paired it with Spendor A1s (walnut finish); I’ll be selling all of my other desk top PC/audio gear—I no longer hear a reason to keep it (sub woofer included). The Atom/A1 pairing is all one needs.

    • Reply
      Paul Rigby
      22nd September 2018 at 8:40 pm

      Good stuff, Kevin – glad you’ve found what you needed.

  • Reply
    2nd October 2018 at 7:11 pm

    Intrigued by the latest Uniti range i have extensively auditioned them all…wondering if i should stick or twist with my old mk1 Uniti. The 50w amp is compromised by the rapid onset of thermal overload, and impending shut down, if it has to work hard. 50w that you can never really wring out. The new range has lessened, but not eliminated, this issue. The 40w amp on the Atom slightly outperforms the old girl, it sounds more refined and a smidge more coherent. The Star is in a different league to both with its 70w amp. It is cruising when the others are sweating. Better quality and quantity and with a much greater range of speakers to choose from. CD replay remains important to me, and remarkably the old girl with its pull out draw and magnetic puck still leads the way here. Headphone output is very good on the old girl, better than some headphone amps that i have tried (despite not being a 1/4 inch socket). The Nova is an outstanding amp. It is the best integrated that Naim produce right now, and by a margin, consider all the digital/streaming ability as a freebie. I am sticking with the old girl…CD player and headphone performance offset the amp gains in my smallish lounge. The price to change is not insignificant…

    • Reply
      Paul Rigby
      3rd October 2018 at 10:23 am

      Thanks for you thoughts, Cobwatch. Appreciate it.

  • Reply
    Artimus Crow
    10th November 2018 at 9:06 am

    Just stumbled upon your page for the first time, great review, but made annoying by your use of “where” instead of “were”. Which is strange given your eloquent use of English outside of this. Sorry, I can’t help it, I’m a “grammar Nazi” I guess! :o)

    • Reply
      Paul Rigby
      10th November 2018 at 2:12 pm

      Quite right too, Artimus – thanks for the pointer. I found one, now corrected, did I miss any others? Thanks for the kind words, incidentally.

  • Reply
    Mr Shoo
    11th November 2018 at 9:30 pm

    Hi and thanks for a nicely written review! Could you please let me know which turntable and phono stage did you use while auditioning? I’m considering an upgrade to my setup and was thinking about Naim and a turntable combo.
    Thanks for the info!

    • Reply
      Paul Rigby
      12th November 2018 at 9:51 am

      Hi Mr Shoo – thanks for your kind words and sure. All you need to do, in these cases, is scroll to the bottom to see what reference hardware I used for the review. That’s where you’ll find the turntable. That said, the Atom works with others successfully too over varying price points.

  • Reply
    Paul Roberts
    10th August 2019 at 2:57 pm

    I am having a bit of trouble deciding betwen the Simaudio Ace or the Naim Atom. Both are nice kit. In reading reviews it seems the Ace will deliver more majesty in the lows but not as detailed in the ability to hear every instrument as the Atom can. Dynamics or detail? I like both! boo hoo, what do I do? I live in Minnepolis and the closest dealer is in Omaha that carries both. I may need to spend a weekend in Omaha?. We have high end audio stores here but none carry either…why? These are hot!

    • Reply
      Paul Rigby
      11th August 2019 at 2:49 pm

      Hi Paul – hi-fi purchases are such a personal thing, I’d actually recommend the trip yes. You’d come away with the personal testing knowing, deep down, that you had made the correct decision. You’ve got to live with this thing for many years (hopefully). Otherwise, you’ll be forever wondering. For me? I’d go for the Ace. Buy hey, that’s me 🙂

  • Reply
    19th February 2020 at 7:51 pm

    Hi Paul, thank you for the great review. I have a dilemma, I currently run Cambridge Audio 851N and 851W set up with Monitor Audio Gold 100 4G stand mount speakers. I like the sound however the CA’s are large, heavy and take up a lot of space on my TV bench. I’m thinking of swapping them for a smaller, one-box system, that I could plug the TV in the Naim via an HDMI is an added bonus. The Naim Uniti Atom and Moon Ace Neo are the two that appeal to me. I have read reviews, and know both are good, but would they sound as good or ‘better’ than my current set up, or do you feel I may be disappointed comparing an all-in-one with my two separates? An expert opinion would be appreciated.

    • Reply
      Paul Rigby
      20th February 2020 at 9:53 am

      Hi Tony – thanks for your kind words. If sound quality is a priority above all else then I’d look at Moon for the solution to this one.

  • Reply
    20th May 2021 at 10:38 am

    Hi Paul, Thanks for your wonderfully informative review. I was wondering if NAIM Uniti Atom could pair with Klipsch Cornwell IV or maybe Forte IV. Also, if Yamaha AS 1200 integrated amplifier is suitable with these speakers ?
    Thanks and Regards.

    • Reply
      Paul Rigby
      21st May 2021 at 9:46 am

      If you’re looking for a big, bold, in your face sound then sure, I don’t see why not 🙂 Both should be fine with the speakers.

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