What Hi-Fi? Verdict
Its strengths are many, its shortcomings very few
Pros
- +
Extensive spec
- +
Fine build and finish
- +
Organised, tidy and expansive listen
Cons
- -
A touch more attack would make it even better
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We originally reviewed the Audiolab M-DAC+ back in 2016, but while it is now officially discontinued, you can still pick up a unit for about £639 these days – a substantial saving over its original price of £800. A decade on, the M-DAC+ remains a solid recommendation if you want a capable and well-built DAC/headphone preamp that has extensive specifications. Check out our also consider section at the bottom of the page for newer alternatives, or head to our best DACs buying guide for more options across all prices. Our original M-DAC+ review is presented below with only a handful of minor contextual updates.
Some acts are tougher to follow than others. For every tough-act-followed-with-aplomb like Kasper Schmeichel there’s a Jordi Cruyff.
Audiolab’s M-DAC+ (or M-DAC Plus) has a long shadow from which to emerge: the original five-star Audiolab M-DAC was one of our favourite pound-for-pound DACs for half a decade, with handfuls of What Hi-Fi? Award trophies and an enviable legacy that still has us fondly remembering and recommending the long-discontinued product, if you can find one.
The M-DAC+ has big shoes to fill, and they fill it comfortably.
Video review
Build & design
The moniker ‘+’ is a confident start, and at first glance it’s easy to see why it’s appropriate. The Audiolab M-DAC+ is a bigger proposition than its famous forebear in every direction; it’s like a DAC that’s treated itself to a loft extension. It’s probably still just about a viable candidate for the role of ‘desktop’ DAC, as long as your desktop is free of clutter.
Apart from the additional bulk, the M-DAC+ doesn’t stray too far from the build-quality and finish template established by the original 2011-released M-DAC, which can only be a good thing.
The M-DAC+ is smoothly and sturdily constructed, impeccably finished and comes complete with a very acceptable remote control – palm-sized but robust and responsive. Aesthetically it’s matched with Audiolab’s recent 8300-series components, with a central OLED display and a pair of rotary knobs for input selection and volume control.
As far as perceived value goes, the M-DAC+ looks and feels like every penny of its premium price ticket. It is available in silver or black finishes.
Features & connections
It’s been ‘plussed’ in terms of specification, too. The coaxial and optical digital inputs (there are a pair of each) can handle 24-bit/192kHz hi-res music files, and the USB type-B socket is good for hi-res audio files as hefty as 32-bit/384kHz PCM and supports DSD64/128/256 files too.
There’s a USB type-A connection for Apple products (iPhones from 5 onwards, iPads from theMini 2) and an AES/EBU balanced digital input for those with pro-studio aspirations.
Outputs include stereo RCA, naturally, a pair of XLRs, coaxial and optical digital, and a 6.3mm headphone socket. So while it could just about see service as a headphones-based desktop device, it’s ready to slot into full systems, big or small.
The original M-DAC was a tweaker’s paradise, with no fewer than seven filter settings available. Each made a subtle but definite adjustment to the sound, and effectively rendered the M-DAC a much more bespoke proposition than its nominal rivals.
For the M-DAC+ the filter count is up to a giddy eleven, with the additional four options applying to DSD audio.
One area of specification that remains resolutely unfiddled-with in the M-DAC+ is the DAC chipset itself. The ESS Sabre32 9018 remains extremely well regarded, and is consequently carried over unchanged from the M-DAC.
Sound quality
We start by examining the M-DAC+’s filter options. Like the M-DAC, the + has seven distinct filter settings for PCM files and, as with the M-DAC, we find we favour the Optimal TransientXD option – it offers the best balance between timing, organisation and attack.
Unlike the M-DAC, however, we also are impressed by the sound via the Minimum Phase setting – it’s a smaller, tighter-knit presentation than Optimal TransientXD but offers a little more attack and dynamism.
In any event, we are unable to find a genre or source of music that isn’t best suited to one of these two filter positions.
So with the knotty filter issue resolved, we settle in for a long, critical listen.
Starting with CD-quality 16-bit/44.1kHz WAV files of Johnny Cash’s One, Boards of Canada’s Aquarius and I Remember A Time When Once You Used To Love Me by Dirty Three, we’re impressed across the board by the Audiolab’s ability to establish a wide and, above all, believable soundstage.
It’s an overtly neat and tidy listen – not quite OCD in its fanatical delineation of the soundstage but nevertheless very concerned with making sure it’s as explicit as possible. That’s a trait we wholly admire, and few other comparably priced DACs describe a stage quite as explicitly as the M-DAC+.
Even the densest, busiest recordings are laid out openly – in terms of staging, focus and sheer three-dimensionality, the Audiolab dishes out the details like a bar room gossip.
It’s equally painstaking when it comes to timbre. The Johnny Cash recording is a pretty simple, sparse affair with a fairly close-mic’d vocal, and the M-DAC+ manages to reveal the fine details and subtle variations in sounds like it was the easiest thing in the world.
Timing is good, with the interplay and integration between instruments sounding natural and unforced. It’s rhythmically adept too, handling the lazy Boards of Canada beat with ease.
It’s a gratifyingly egalitarian device. It doesn’t look down its nose when we switch to a poverty-spec, 256kbps iTunes-derived file of David Axelrod’s London (it grants the tune as much breathing space as is available and continues to focus well), and neither is it exposed when we move to 24-bit/192kHz files of Elvis Costello & The Attractions’ Man Out Of Time.
The more information-rich the file, the more information the Audiolab M-DAC+ hands over, combining authority with fluent musicality in a way that encourages further listening.
It’s a similarly confident, authoritative performer when listening via the headphone socket. This Audiolab’s talent for staging, focus and detail retrieval is even more apparent when using an appropriately capable pair of wired headphones.
Nothing’s perfect though, obviously, and the M-DAC+ is no exception. For all its powers of organisation, rhythmic assurance and unflustered attention to detail, we would ideally like just a touch more drive and attack when recordings really demand it.
It describes the shift from ‘very quiet’ to ‘very loud’ in a recording like The White Stripes’ Ball And Biscuit in a detailed and agile manner, but the last scintilla of the aggression the tune thrives on is fractionally underplayed. We find we wonder how the M-DAC+ would handle itself in a mosh-pit.
Ultimately, though, that’s nit-picking. Everything the M-DAC+ does well – and it does an awful lot well – it does really very well indeed.
Verdict
The Audiolab M-DAC+ gets an awful lot right – so much, in fact, it comfortably justifies its ‘+’ designation.
Lavishly detailed, fastidiously organised and elegantly straight-edged in its sound, it demands an audition even today.
First reviewed: June 2016. Review updated: February 2025.
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