MMR Gáe Bolg
Disclaimer
I would like to thank Joseph Mou for providing me with the MMR Gáe Bolg in exchange for my honest opinion. No incentive was given for a favourable review.
Gáe Bolg
- 5 Custom Tuned Balanced Armature Drivers Configuration
- 1 Tweeter, 1 Vented Mid-High, 1 Mids, 2 Vented Lows
- 4-Way Passive Electro Frequency Division
- TriBore Waveguide
- GB Acoustic Chamber™
- Frequency Response: 20Hz-40kHz
- Impedance: 25ohm
- Noise Isolation: -18db (UIEM)
- Price: US$1,199 (Lite) or US$1,399 (Complete)
Links:
https://metalmagic.co
https://www.facebook.com/Metalmagicresearch/
https://www.qobuz.com
For a free 1-month trial of Qobuz visit:
https://duneblue.com/portfolio_page/qobuz/
Preamble
Last year I introduced Metal Magic Research, or MMR for short, when I reviewed their unique flagship hybrid IEMs the Thummim. Named after a mythical spear, the Gáe Bolg continue the tradition at MMR to do things a bit different from others, be it this time at a much more affordable price point and with a balanced armature only design. Balanced also seems to be the name of the game with Gáe Bolg. Where the Thummim are unique, crazy even, with tons of energy and the most extraordinarily spherical soundstage I have ever heard, the Gáe Bolg feel more conventional, balanced and extremely versatile.
In fact, Gáe Bolg fit a category I recently saw promoted for the VxV by FiR Audio, which was termed ‘EveryDay Carry’, or EDC for short. I am not into the EDC scene, I can however imagine what IEMs would have to be like to fit into an EDC load out. Such IEMs need to have an excellent build quality to take everywhere, a comfortable fit for using them all day long and a versatile signature because you will want to listen to all your music using them. Gáe Bolg fit this to a T.
I have had Gáe Bolg over for quite a while now and had initially planned a regular review. However, because of the highly versatile nature of Gáe Bolg and coincidentally being offered a 3-month trial from Qobuz, I saw an opportunity to do something I have always wanted to do. We are in this hobby because of the music, yet our focus on gear tends to distract from that to a point where many often forget to enjoy the music. I have already started a review series dedicated to classical music where I put the music first and use the gear as a means to an end. In other words, the IEMs should be seen as the tools we use to enjoy our favourite music. For Gáe Bolg I wanted to spin that concept around and use their versatility to explore new music using Qobuz’s 70 million songs and over 220,000 Hi-Res albums. Yes, I copied Qobuz’s marketing line there, but the point here is that having versatile IEMs and a silly big catalogue of music to dive into must be an audiophile’s equivalent of skinny dipping into Willy Wonka’s chocolate river.
This is also why I kept delaying this review. I didn’t really want to write it because I was enjoying the music too much. I just wanted to keep going like an Energizer Bunny. I kept checking Qobuz’s new releases and album suggestions, friends kept sending me tips on what albums to try and some of those albums I just kept playing again and again because I loved them so much. I can write all the sound impressions I can think of (don’t worry I will write some), but this more than anything is a testament to how nice the Gáe Bolg are to listen to and just how versatile they are.
Unboxing
Reviewer’s privilege, I received the Gáe Bolg a little before their official release and for me they simply came in a metal round case without any packaging. MMR were however kind enough to send over pictures of the full presentation and they did a really nice job of creating something special. The box displays the IEMs neatly alongside a metal product card and a unique looking leather case. From what I understand a full set of Acoustune tips is included as well.
Images courtesy of MMR.
With the IEMs comes of course the cable and which one you receive depends on the version of the Gáe Bolg you bought. Gáe Bolg is offered in a ‘Lite’ and a ‘Complete’ version and the Lite comes with a regular stock cable, whereas the Complete comes with the premium Eletech Prudence. One added advantage of the Complete version is that you can choose the termination in standard 3.5mm single ended, 2.5mm balanced or 4.4mm balanced. The Lite only comes in 3.5mm single ended.
Build quality and fit
When I had Gáe Bolg in my hands for the first time, it struck me just how detailed and well thought out the design is. It is gorgeous to look at, feels great in the hand and a lot of attention must have gone into finalising the fit and finish. In no way do I feel this is any less than what you get with the flagship Thummim, despite the considerable difference in price.
The most obvious feature is the three-dimensionally designed faceplate that is CNC’d from aluminium and takes inspiration from the mythical spear after which the Gáe Bolg were named. The beautiful satin red colour with its sandblasted finish contrasting against the matt black backplate is incredibly well done and coincidentally nearly impossible to do justice in pictures. The other side is super smooth, also from aluminium and designed with optimised comfort that I think worked out really well. I have used the Gáe Bolg for countless hours and never experienced any discomfort from them.
Similar to Thummim, Gáe Bolg uses an acoustic chamber to control the tuning. I expect this acoustic chamber is once again 3D printed with great precision onto which the drivers are mounted.
Image courtesy of MMR
The stock cable is a very nice one, as far as stock cables are concerned. Nothing too fancy, but sturdy, comfortable and with nice parts. Of course when you go for the Complete version you get the Eletech Prudence included and that is a very nice cable. Prudence is a 26 AWG silver-plated copper that is clearly a step up from most spc cables. At 26 AWG it is a little thicker than the stock cable and because of how supple it is, you don’t notice the difference. The parts on Prudence are of a very high quality and gives a bit of added bling to Gáe Bolg.
Gáe Bolg Lite vs Complete
The big question with Gáe Bolg is of course whether or not it is worth paying the US$200 premium for the Eletech Prudence upgrade of the Complete version. Prudence usually sells for US$249, so you get a nice discount on it, and there is of course the option for a balanced termination in either 2.5mm or 4.4mm. But what about the sound?
In my opinion Prudence has a noticeable impact on sound quality. It doesn’t change the character of Gáe Bolg as such, I don’t think any cable can significantly affect the character of IEMs, but there are some improvements nonetheless. The stock cable has a somewhat warmer presentation. Prudence reduces that a little bit by tightening the bass and giving it more impact, which instantly gives Gáe Bolg a little more dynamics. Overall clarity is improved and the stage becomes larger both in terms of width and depth, and airier to give an even more spacious feel. The main benefit of this can be found in the imaging. Imaging is already good with the stock cable, but Prudence (in my opinion) elevates it to another level. Suddenly the music seems to be presented with more precision and better positional information, thanks in part to a blacker background.
I am not sure, but in all honesty I would not be surprised if Gáe Bolg were tuned with Prudence in mind. Although I am always reluctant to outright recommend gear, especially a cable, I genuinely think that it is worth considering the upgrade if your budget stretches that far. You won’t really miss out with the stock cable and some might even prefer the slightly warmer sound, but if you want to get the extra edge in performance then going for the Complete version is an excellent option.
As such, my impressions will be with Prudence to represent the Complete version.
Source
I have used Gáe Bolg with a number of different sources and I honestly think they pair well with everything, although I personally like them especially with a more analogue sounding source such as the Shanling M8.
-Dethonray Honey H1-
The Honey H1 is a USB DAC/amp and a darn good one at that. I don’t think it quite gets to the level of the higher end sources I use, but it is a great performer for its price. The Honey H1 worked wonderful for streaming using my MacBook Pro.
With the Honey H1 the Gáe Bolg get a lovely smooth presentation that is easy-going and has a fluidity to the notes that makes them especially pleasing to listen to for longer periods of time.
-Lotoo PAW Gold Touch-
A recent addition to my DAP stable and the highest performer of the DAPs. With the LPGT the Gáe Bolg get a crisper and clearer presentation with more bass impact and overall a more dynamic feel. The stage is larger and more airy, and the background gets Lotoo’s trademark deep darkness.
-Shanling M8-
My primary streaming DAP for reviews. The M8 gives the Gáe Bolg a more analogue sounding low end with a bit more growl. The Gáe Bolg get a highly dynamic presentation with a smoothness similar to the Honey H1, but with a bigger and more airy stage.
-Violectric V380-
The Violectric V380 is a neutral high-end desktop DAC/amp and I used it primarily for comparisons, as it has two 6.3mm SE headphone outs, making it particularly useful for A/B-ing. The V380 scales the Gáe Bolg very nicely, imbuing them with more dynamics, a bigger stage and more air.
Presentation
The Gáe Bolg are wonderfully balanced IEMs that I feel show something I would describe as an exercise in moderation. Now don’t think that what I mean is anything boring or subdued, the Gáe Bolg are anything but, it is rather in the balance that MMR have struck with them. The Gáe Bolg have a rich sound that is thoroughly enjoyable and doesn’t push anything too far. The stage is large and airy, which is complimented with full sounding notes so that that stage is really nicely populated. With few instruments going on there is focus and detail, yet when the music builds up in complexity, the stage starts to fill up and creates a highly dynamic and enveloping musical experience. There is intimacy to it, while never feeling congested or harming separation and detail.
The bass is well controlled, but quite full sounding at the same time. It has weight to it and is perhaps not the fastest most articulate bass, but I think that is the point. It is tuned without going too far, so that it starts to build up a rich and relaxing signature that is still highly versatile. Mids have a hint of warmth and again that richness with clear vocals that are very nice. Not the best vocals, but good clarity and density nonetheless. Treble is smooth and a little bit laid back without harming sparkle or reducing the airiness too much. I won’t say it is entirely linear, but what it is, is balanced. By not pushing anything too much, the Gáe Bolg are tremendously versatile and enjoyable. I have listened to a lot of different music and they do it all very well. Mind you, I don’t think that these are the most accurate in terms of timbre and so with classical music you do start to notice it a little. Yet at the same time it never bothered me because it was so enjoyable.
The Gáe Bolg are like a high quality chocolate mouse that does not have the pretentiousness that comes with a Michelin Star. This is no plate left mostly empty with a tiny scoop in the middle and silly garnishing. This is proper pudding that avoids artificial flavouring because it is naturally rich. That makes the music so enjoyable. It is rich, but doesn’t sound “off”. In fact, it sounds just right. Let’s take a closer look at that…
As I have explained, I got new music from everywhere to try out and here is a selection of some of those albums that I think illustrate the sound of the Gáe Bolg very nicely.
Yeahman - Ostriconi
Just to illustrate how arbitrary my selection criteria were for albums, I picked Yeahman’s Ostriconi out of the new album releases of the Qobuz front page simply because the album art looked peaceful. Indeed the album is very relaxed and seems to have some world music influences that the DJ mixes with electronic. The album also shows how wonderful it is to just explore because I absolutely love this album. It is cheerful, feels positive and bright. Tell me you don’t cheer up when hearing
Baixi Baixi.
The Gáe Bolg adapt to this incredibly well with their clarity and balance, where the bass is delicious and acoustic instruments sound fresh. The track
Soupe Fue has a wonderful sparkle to it with a thick and lush bass line that always gets me moving in my seat. Imaging is once again great and it surprised me how far away some details of the track are (towards the end of the track on the left). Strings have a really nice crispness with just a hint of bite, but again in moderation, as you can hear in the track
Sakoneta.
Minco Eggersman - Unifony
This one I happened to come across while looking at Dune Blue’s (a distributor I sometimes collaborate with) Facebook page. They were promoting the Final D8000 headphones together with Minco Eggersman’s second Unifony album and I happened to have Dune Blue’s demo unit of the D8000 over, so good enough excuse to have a listen.
This album has a very relaxed, sort of minimalist flow to it, not unlike Ludovico Einaudi. It is super relaxed and the Gáe Bolg render it really well. Imaging is excellent with great positional information and so the layers build up really well, as you can hear in the build up of the track
Hunt. Because of the Gáe Bolg’s richness the pace feels slow, relaxed and enjoyable, which is complimented with a little bit of crisp clarity to for instance horns, strings and piano notes. The track
Whisper shows off this contrast between the slower, heavier bass line and the crispness of the piano notes.
Porcupine Tree - In Absentia
Less arbitrary was the tip I got from my Twister6 colleague Anirudh (Animagus), who is a professional musician, producer and all-round music expert. He recommended I give the progressive rock band Porcupine Tree’s album In Absentia a go, as it is highly regarded for its production as well as the music itself. I am completely new to prog rock (as far as I am aware anyway), but this is another album that has quickly shot to the top of my favourites.
The track
Trains shows off the Gáe Bolg’s very nice vocals as well as some excellent acoustic guitars sections that I think Gáe Bolg render really well. The solo sections get me air-guitaring along as if I have any idea on how to play the guitar. Under that layer of vocals and acoustic you get that meaty bass with pretty good impact from the kick drum. Talking about air-guitaring like an idiot, one of my favourite tracks is
Wedding Nails, which the Gáe Bolg give a ton of energy, nice crunch on the electric guitars and a great image that feels hollow, like sound resonating in an abandoned building that is quite eery. Interestingly, I think Joseph Mou seems to have a talent for tuning for guitars. Those always sound great. I had that with the Jomo Trinity, the Thummim and now the Gáe Bolg. The opening of
Blackest Eyes shows off the imaging and richness of the Gáe Bolg really well. Starting with a sound that feels like it is flying around your head with great panning action before it bursts into gear and you get this sense of the music enveloping you.
Goldfrapp - Felt Mountain / Black Cherry
My friends on Head-fi know I have a soft spot for female vocals and one of my friends recommended Goldfrapp. He suggested that I start with Felt Mountain, but I ended up listening to Black Cherry more. On Felt Mountain, which is a more conventional album, tracks like
Paper Bag shows how wonderfully intimate and hauntingly beautiful the Gáe Bolg can render Allison Goldfrapp’s voice.
In the end I loved Black Cherry more because of its energetic vibe and great use of synths. There is lots going on in tracks like
Crystalline Green, where the imaging of the Gáe Bolg works great in balancing intimacy with somehow still a great sense of spaciousness. My favourite track has to be
Tiptoe, which I was listening to the first time while cooking dinner and it had me dancing through the kitchen. Here the Gáe Bolg have that balance with richness and crisp sounds layered, but always with easy-going, fun and punchy musicality.
Snarky Puppy - We Like It Here
Snarky Puppy is forever being plugged by my friend and reviewer for the Headphone List, Deezel. So after having heard him talk about it for so long, I had to give it a go. It is a type of instrumental jazz fusion and can get very layered, with lots going on.
In the opening track
Shofukan, you get a sense of how the Gáe Bolg don’t push things too far. Horns in it sound great, but don’t have the bite you often get. I quite like that bite, but this smoother presentation is what makes the Gáe Bolg so wonderful for long listening. It still sounds exciting and yet never gets fatiguing. In
Jambone things get feel quite hectic and it has lots going on, yet the Gáe Bolg allow you to hear every element without pushing separation. Again it is that moderation I feel the Gáe Bolg have that makes them so wonderfully easy going. It has a great guitar solo as well.
Max Richter - The Four Seasons (recomposed)
What about classical music? I think regular readers of my reviews know how much I love classical music. Here I find the Gáe Bolg less in their element, as critical clarity, separation and transparency are not quite there. The Gáe Bolg have nice clarity and such, but there is a soft edge around instruments that is not as suited to classical music if you are being critical. However, it is also exactly that softer edge that gives Gáe Bolg their charm and classical music is still very enjoyable to listen to. Because of this characteristic I actually found that Max Richter’s type of classical music works very well.
I know Vivaldi’s The Four Seasons very well, having included it in my series Masters of Classical Music for the Vision Ears VE5. Max Richter’s recomposition of it adds a modern twist that benefits from the richness of the Gáe Bolg, while violins still sound rather fruity on top of that richness. (I’m starting to get hungry from all the food analogies.)
To be honest, I actually don’t like this recomposition at all. And why the heck is there a fifth “Shadow” season? The
Four Seasons, Max, just four. But irrespective of that, I do think the Gáe Bolg have the richness that works for this twist on classical music.
Comparisons
For comparisons I switched back to the stock cable for the Gáe Bolg and used the Violectric V380 desktop DAC/amp with my MacBook Pro as a source for streaming the different albums from Qobuz. The V380 comes with two single ended 6.3mm headphone outputs and thus makes it ideal for direct comparisons, with only minor adjustments in volume needed between IEMs.
-Campfire Audio Ara-
The Campfire Audio Ara are price right in the middle of the Lite and Complete versions of Gáe Bolg at US$1,299. In terms of build quality the two are very similar, although the designs are completely different. The Gáe Bolg come with a much more elaborate design in aluminium and a striking colour, where the Ara look more industrial by comparison with a bare titanium shell. I personally prefer the look of the Ara, as it has been one of my favourite designs ever since I first saw it with Campfire Audio’s similarly designed Andromeda. I can however see others preferring the more intricate design of the Gáe Bolg.
In terms of sound I find the Ara to have a more intimate presentation with a smaller stage, less air and more forward vocals by comparison. The Ara are also a bit brighter in the treble and have relatively more mid-bass presence. The Gáe Bolg have the larger, more airy stage and I feel perform beyond the Ara in terms of imaging and clarity. The bass is tighter, faster and more impactful, and while the treble is not as sparkly as that of the Ara, I find that Gáe Bolg still manage a more dynamic overall feel with nice energy in strings.
I think the Ara have perhaps the edge in build quality with the titanium instead of aluminium shells and a better stock cable, but the Gáe Bolg are in my opinion the better performers in terms of sound.
-Vision Ears VE5-
The Vision Ears VE5 are once again similar in price starting at €1,250 for the Signature Edition universal. In terms of build quality you get very different propositions with the VE5 being made out of resin and the Gáe Bolg out of metal. Obviously this makes the VE5 much lighter and Vision Ears offer them in CIEM and custom universal, so that the fit can be perfect and the design entirely the way you want it.
In terms of sound there is a big difference in presentation. The VE5 have a uniquely focused presentation that is more intimate, yet presents instruments with greater clarity, against a blacker background and with more air around them. They also have some of the very best vocals available. By comparison the Gáe Bolg feel bigger, more dynamic in their presentation, not quite as clean or focused, but more fun, even though I find them very nice for classical music as well. The Gáe Bolg are in my opinion the more versatile, whereas the VE5 are the more accurate sounding IEMs.
This comparison is more apples vs oranges and I think both have a lot going for them. For versatility the Gáe Bolg have it, where the VE5 offer less versatility in exchange for one of the most unique and beautiful presentations I know. If anything, these two are complementary.
-FiR Audio VxV-
The VxV came in just as I was finishing up this review and make for the most interesting comparison. The VxV are explicitly marketed as “EDC” and sit at a very attractive price of US$999 just under the Gáe Bolg. The VxV feel purposely designed as ‘carry everywhere’ IEMs with an excellent build quality that is similar to the Gáe Bolg, but more understated in their design. The VxV are smaller and lighter, and in terms of comfort I think both do really well. The VxV however have the advantage of the Atom pressure release module that is very effective combating fatigue. The stock cable of the VxV is also very nice, incredibly supple and of a higher quality than the stock cable of the Gáe Bolg.
In terms of sound this has been a really difficult comparison because these are very close and yet have a slightly different presentation. The Gáe Bolg feel more linear and balanced with a more spacious stage and perhaps more airiness. However, while the VxV have a more forward feel to them that gives a sense of intimacy, the Atom module still generates a spacious presentation and separation of instruments is outstanding, as well as imaging. The VxV feel a little warmer and even more dynamic than the Gáe Bolg and with better vocals, but don’t have the richness that makes the Gáe Bolg so nice. The bass is really tricky because both have a nice bass. The Gáe Bolg feel like there is more weight behind it, whereas the bass of the VxV has more texture and impact.
These two are incredibly close and it is hard to pick one over the other. I personally prefer the VxV, but listening to the Gáe Bolg never makes me feel like I want to switch. The choice here is really down to personal preferences and budget, but both are excellent performers.
Aftermarket cables
-Eletech Prudence 8-
I had initially planned to try out a number of different cables, but this review was already getting very long and so I decided to skip cable rolling, except for one. The Eletech Prudence 8-wire version because how could I not try out what the effect would be of doubling up on the fun supplied by the standard Prudence.
Doubling wires can have unpredictable effects and in this case I was a little surprised by the result, although pleasantly so. Prudence 8 pushes back the presentation a little to make it feel less intimate and not quite as rich due to a smaller note size and a little less warmth. In return Prudence 8 adds air and clarity with a tighter and more impactful bass and a bit more sparkle. To me it does not harm the musicality at all and it is a very enjoyable pairing. However, I don’t know if I might prefer the standard Prudence, I quite like the intimacy and the enveloping rich feel that Gáe Bolg provide with it.
Conclusions
If it was not clear yet, I love what MMR have done with the Gáe Bolg. From the build quality to the comfort and from the optional cable upgrade to the highly versatile and enjoyable sound, the Gáe Bolg offer a very complete package. The rich, yet balanced sound is never fatiguing and will work with every type of music. That is also why this review took me way too long to get written. Too much time spent enjoying the music [smug grin]. I can highly recommend a demo!