No piece of audio equipment is more contentious than the humble DAC. It can cause some pretty major arguments. On one side, you’ve got people saying that it’s a crucial part of the audio chain, and relying on the built-in circuitry of your phone or laptop to convert digital signal to analog sound is ridiculous. On the other, you have those who are firm in their belief that the difference a dedicated DAC makes is so minor, so ethereal, that you’re better off spending your money on the headphones, or the amp, or possibly (as some high-level DACs cost thousands of dollars) on a ticket to Las Vegas. iFi Audio’s Micro iDAC2 isn’t going to help either side work out their differences with the other – but in our opinion, it’s a DAC worth considering. Here’s why.
 

The iDAC2 is compact and (mostly) well-designed | The Master Switch

Design:

Here’s the unfortunate problem with iFi’s Micro range: once you’ve seen one, you quite literally seen them all. For while the controls and inputs and outputs may vary, in shape and structure they are absolutely identical. The Micro iDAC2 has the same design as the iCAN SE (full review here), the iUSB, and the iTUBE, all of which perform various functions and all of which are shaped like science fiction coffins: gleaming metal and angles and strange protruding bits. It’s a design you’re either going to love or hate; we quite enjoy it, as the individual units look quite eye-catching when lined up, but we can see why it would be an acquired taste.

Like all units in the Micro range, there are a solid set of controls on either side of the DAC’s rectangular body. On one side, you get an RCA output, a 3.5mm headphone jack, and a volume control (which only controls the headphone out – the RCA is set at a fixed volume). On the other, there is both a digital output and a digital input, and a filter switch allowing you to select different modes. We love iFi’s switches, which are clicky and chunky, and feel extremely robust - and that’s definitely the case here. So far, so good: the controls are well laid-out, and mostly make sense.

We say mostly because the iDAC2 runs into a similar problem that the iCAN SE faced. Namely: the labelling is a total mess. The underside of the unit is a collision of strange logos, marketing copy, and instructions. And although you can hide those away by simply putting the unit face up, there’s no getting away that the rest of the labelling is confusing as hell. Take the labelling around the filter switch: you get Bit Perfect, Min Phase and Standard, all legible but not exactly informative, especially if you don’t know huge amounts about how DACs work. That would be bad enough, but the iDAC2 is capable of processing both DSD and DXD audio, in addition to the standard PCM - here’s a full explainer if that’s gobbledegook - and that means that the filters do different things depending on the type of audio being fed through them (although DXD has a fixed filter). The Bit Perfect does not do that when you’re playing DSD Audio. “On the casework,” says the manual, “the filters are marked according to the PCM convention but for DSD they are in the same order as above so ‘Bit-Perfect’ = ‘Extreme’ and so on.”

That ‘and so on’ just slays us. It makes perfect sense once you get your head around it, but there’s no denying that this is a clunky and unintuitive way to label the filter. If we were in charge of the sort of thing, we’d simply put numbers or symbols there, and then have a full guide table in the manual. And by the way, we could do with a little bit more information about what exactly the filters are doing to the sound, something we are going to have a good old bitch about in a section or two. 

(It’s worth noting that iFi give filter setting recommendations in the manual, so don’t worry if none of this is making sense!)

The complexity continues when you look at the LED lights on the top of the unit. They not only indicates power and whether audio is playing, but tell you the type of audio currently being played, using a-color coding scheme. This sounds useful, but if you can tell the difference on-the-fly between blue (which indicates DSD2.8/3.1MHz audio) and cyan (176/192kHz audio), then you’re more switched on than we are. And maybe we’re alone in this, but we had to Google magenta.

It’s a shame to see such a robust build let down by such fussy and fiddly design. The good news is, you probably won’t need to pay much attention to the DAC after a while, as you’re more likely to find a filter you like and stick with it, but we’d say that the folks at iFi badly need to rethink how they communicate information on their equipment.

What puzzles us, even now, is that the units aren’t stackable. They look like they are designed to be, like you could set the iDAC2 right on top of the iCAN SE, but you can’t – or at least, not without a lot of precarious balancing. To be fair, iFi do provide a way of doing this: the unfortunately-named iRack, a set of shelves which cost – we wish we were making this up, but we’re not – $159 on Amazon, although it comes with an RCA cable. It smacks a little bit of what the British call taking the piss, but even if you avoid it (and at that price, you should) you shouldn’t avoid the iDAC2. 

See, it sounds wonderful.

The iDAC2's filter section, plus the digital input and output | The Master Switch

Sound:

Will this DAC make a difference to your audio?

Our take is that it will. It’s a subtle difference – sometimes a little too subtle – but it’s there. We tested the iDAC2 not only with its iCAN SE amp brother, but also with a variety of different amplifiers and headphones, including our regular Beyerdynamic DT770 Pro 80 ohm, and various sets of speakers. In all cases, the quality of the sound was noticeably improved from when the iDAC2 was swapped out. Sound felt richer and more textured, with a good deal more detail. It often felt like the iDAC2 was smoothing things out, allowing us to get a more balanced picture of what was going on in a song, and allowing us to perceive things we couldn’t before. Again, this isn’t a dramatic difference – and it may not be dramatic enough to justify a $350 price tag – but for those wanting to really get the absolute best out of their audio setup, it could be just what they’re looking for.

It’s actually quite difficult to go in-depth on what made the iDAC2 worthwhile, which is probably going to be welcome ammunition for those who say that DACs make no difference at all. All we can say is that, over a month or so of listening, with dozens of hours put in on all types of material, we found that the sound wasn’t quite the same when the iDAC2 was removed from the equation. It’s a tribute to the circuitry that iFi has packed into this thing, which includes an excellent Burr-Brown chipset from Texas Instruments, and allows the DAC to run up to what is known as QuadDSD 256, which is a seriously high-quality file format. DSD audio playing through this thing is absolutely spectacular. Its maximum levels for regular PCM audio is 24-bit/384KHz, which is somewhat higher than comparable DACS.

That doesn’t mean that it’s without its faults. The filters, for one thing. We just didn’t feel that they changed the sound enough. In some cases, they added or removed a little bit of air and dynamism in the mix, which was handy when switching between genres like hip-hop and heavy metal. But in other cases – particularly with the DSD filters – we just couldn’t hear a difference. Our hearing, as you’d expect, is pretty well-tuned for this kind of thing, having listened to many, many other amps and DACs. But in this case we felt that the difference was too subtle to matter. It’s definitely too subtle to bother getting to grips with the clunky labelling system, that’s for sure.

We were also curious as to what exactly was going on when each individual filter was selected, and in this, iFi was curiously reticent. The company’s Lawrance Lee said that they “can't get into too much detail regarding how our filters specifically work, but it's very similar to other filters and DAC roll-off filters.” Our take is that the company either needs to explain what’s going on in there, or the difference in future iterations needs to be more pronounced.

But in terms of sound quality, this is a minor fault. Overall, the iDAC2 offers impressive, if not world-changing audio quality, but genuinely makes a difference to your music, and helps you get a more accurate picture of what’s going on.

How many DACs do you know that come with an RCA cable in the package? | The Master Switch

Accessories/Packaging:

Say what you will about their labelling skills and their slightly obtuse approach to filters, but there’s no question that iFi’s accessory game is on point. We said as much when we reviewed the iCAN SE amplifier, which really impressed us with the range of accessories it came with. The iDAC2 echoes that trend: it’s the only DAC we’ve tested that actually ships with an RCA cable, as well as a surprisingly attractive translucent blue USB cable. 

As almost every DAC will require you to use an RCA cable anyway, and not everyone is likely to have one lying around, we really appreciate that iFi are saving you the extra purchase. The idea here is simply to plug-in and go.

The packaging is nicely presented without being over-the-top. It’s easy to slide off the top of the thick cardboard box, and once you do, you’re presented with the iDAC2 nestled in another soft cardboard slot. The accessories are underneath. There is probably no need to keep the actual packaging once you’ve installed the IDAC2, but it does a good if unspectacular job of presenting the product in a decent light, and making the experience of getting an opening one worthwhile. We like.

The iDAC2's LEDs flash some confusing colors | The Master Switch

Verdict:

It would be easy to accuse the iDAC2 of being overpriced. At $350, it’s a lot of money to pay for something that will only make a subtle difference to your sound quality, and which has a few annoying, if minor, faults.

And yet, while we think it’s a little overpriced, we don’t think it’s dramatically so. The type of people who will get the best out of this are those who are already comfortable with audio equipment, and who have invested money in amplifiers and headphones. Not only will they be willing to put up with some of the design quirks at hand here, but they are also more likely to notice and appreciate the subtle sheen that the iDAC2 points over the sound. 

We say that that sheen is worth paying for, and so we recommend the iDAC2 as being worthy of purchase. It pairs particularly well with other iFi products – we loved using it with the iCAN SE, which we thought sounded harmonious and clear when working with its sibling – but it pairs equally well with any dedicated amplifier, and will be a huge upgrade from any internal DAC. No debate on that.
 

Good:

  • Delivers on audio quality.
  • Versatile and adaptable.
  • Comes with accessories that let you get going in minutes.

Bad:

  • Unclear labelling and design.
  • Filters are too subtle to make any real difference.

See the iFi Audio iDAC2 on Amazon

The confusing labelling on the iDAC2's underside | The Master Switch

Alternatives:

JDS Labs OL DAC

JDS Labs OL DACWhen we’re thinking of a cheaper alternative to the iDAC2, as well as a less complicated one, this is the first thing that sprung to mind – perhaps because we’ve currently got it on our test bench, in preparation for a full review. But in terms of simplicity and sound quality (even though it only goes up to 24bit/96kHz), it’s an excellent second option.

The audio sheen isn’t quite as smooth or accomplished as iFi’s, but there’s no denying that this is significantly easier to use. It has minimal controls, and if you need it, it even has an optical input, controlled by very straightforward switch on the front. This is an ideal starter DAC, and one we are really enjoying.
 

TEAC HA-P50SE-R

TEAC DACThe slightly more expensive TEAC not only shares a similar look to the iDAC2 (albeit with a nifty red surface – at least on the unit we got to play with) but also similar functionality. It is a little bit more expensive, but you do get a couple of nifty features that may make it worth your while.

Chief among these is a built-in analog-to-digital converter, accessible via the 3.5mm input jack. Not everybody would need to use that, but it’s very nice to have. Like the iDAC2, this one has a Burr-Brown chip, and it makes short work of any audio that it needs to convert.
 

Musical Fidelity V90DAC 

Musical Fidelity V90In our opinion, this probably offers the best value-for-money, balancing accomplished sound with a good range of features, including an excellent input section but not only features the standard USB, but a coaxial input and twin optical inputs.

We prefer the audio from the other DACs mentioned above, but only just – when it comes to this particular product category, differences can be minimal. This matches ease-of-use, a good feature set, a price that seems right on the money, and an excellent set of conversion circuitry. We like.
 

Specs Table:

DAC Price Amp Chip DSD? Max Sampling
iFi Audio Micro iDAC2 $350 No Burr Brown  Yes 24-bit/384KHz
JDS Labs OL DAC $139 No AK4490EQ No 24-bit/96kHz
TEAC HA-P50SE-R $390 Yes Burr-Brown PCM5102 No 24-bit/96kHz
Musical Fidelity V90DAC  $299 No Burr-Brown PCM1795 No 32-bit/96kHz 

Video Review:

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