Review: Flux Lab Acoustics Atlas – For the love of music

The headphone that probably blew me away most with this combo is the 300Ohm Sennheiser HD800. On paper the Atlas seems like a match made in heaven as it shares the same characteristics as the Sennheiser and in this case it really is a match made in heaven both in SE as well as in BAL mode. Great speed, incredible sound stage, great body in bass in mids, excellent impact and so many detail. The Atlas does it all without ever making the HD800 sound harsh, too sharp or wide and I wouldn’t be surprised if it actually was tuned by a big HD800 fan. I especially love it with the DAC filter set to Super SL, but all I can say is WAW.

The Focal Utopia is another headphone I really like and it’s one of my personal favorites to be honest. With the Atlas in low gain it delivers great clarity, speed and precision, with a neutral amount of body overall. For some the body with this combo might be a bit light in the mids, but I really love the bass impact, detail, overall layering and musicality. It’s another excellent combo with an excellent sound stage, great depth and awesome speed, especially in the Short SL DAC mode and in the balanced configuration.

It’s clear the Atlas performs well with most headphones and exceptionally good with a number of them. Atlas is neutral and precise, fast, balanced, linear and detailed and so you will hear this in the headphone you’re listening to. You might like completely different things than I do, so the advise is still to listen to your favorite headphone with the Atlas yourself. To me Atlas really is a high end, top quality DAC/AMP/streamer, etc…

Synergy – Earphones

The Atlas has more power than you’ll ever need for any IEM and seeing IEMs in general are extremely easy to drive, most people won’t be using something like the Atlas to drive them. But you always can and so for this test we have chosen 2 specific IEMS: the Meze Audio Rai Penta and the oBravo Ra C Cu which needs and loves a lot of power.

For the oBravo Ra C Cu to sound best you have to up the gain of the Atlas to MID and together with the Short SH DAC setting, it just sounds incredibly good. The Ra loves power and when supplied with enough of it, it sounds very good. If you don’t get the source right the most expensive IEM in the world won’t sound extraordinary, but in this case, it absolutely does.

The Meze Rai Penta also performs excellent from the Atlas but it even in LOW gain mode, gets loud fast. The Rai Penta and Atlas combo is really splendid, and it’s another combo I just can’t stop listening to. Listen to Lykke Li’s “Youth Novels” or the OST of “Bohemian Rhapsody”, and impressed you will be.

I tried a whole series of my favorite Custom IEMs with the Atlas to test it for noise, such as the Jomo Flamengo, but there just wasn’t any to be found. Atlas will sound clean and perfectly silent on that pitch black back ground.


I spend a lot of time listening to gear every single day and my wife accepts that (Best ever! She might be reading this) but I tend to stop listening/working at 9PM in the evening so we can spend some quality time together. The last few weeks my wife hasn’t always been happy with me though, “You’ve been spending way to much time in your office” is what she says. Well what can I say… blame Atlas.

It’s one of those amps you enjoy so much and listening to your favorite tunes is just pure bliss. I just want to listen to more tracks and turn up the volume because it sounding so good.

Atlas might be a bit expensive (and huge) but boy does it sound incredible. You get a high end, very well balanced, detailed but musical sound and you’ll fall in love with it right away. It’s no wonder the first batch sold out directly. You better start saving up and don’t forget new, extra large, furniture. Listed! (check out our choice of Best DAC/AMP combos here)

Oh and also, guys, can you make me a portable version of this? Seriously, like, soon. Thanks.



Lieven is living in Europe and he's the leader of the gang. He's running Headfonia as a side project next to his full time day job in Digital Marketing & Consultancy. He's a big fan of tube amps and custom inear monitors and has published hundreds of product reviews over the years.


  • Reply March 21, 2019

    Jason Bradshaw

    11kg! Heavy gear! U could work out with this! I like it!

  • Reply March 27, 2019


    Thanks for extended review, Lieven!

    Let me just add that based on one-month living with Atlas (accompanied by Meze Empyrean – both are outstanding!) I have to report that I2S/LVDS-through-HDMI input realized in Atlas on best way. It is rather rare thing. I have best performance using this type of connection with my transport.


  • Reply September 16, 2019


    Seems like another company that makes excellent products but gets very little exposure. A few years back I heard the Head II from Trafomatic Audio and was blown away by their gorgeous sound. Before the audition I didn’t even know the company, and Googling it will tell you they still have relatively little exposure here in the state side. I ended up buying one this month. I know when its time to say goodbye the resale value is going to tank really hard, but given how good they sound, I’ll take the hit.

    This Flux Lab company seems interesting. I’m really interested in the IRIY and IRIY TUBE, just that there’s no way to demo it….I’ll email the company owner and see what they can do.

  • Reply October 26, 2019

    Darek Kawulok

    Thanks Lieven,
    I wanted to ask you, after reading several of your reviews, if you had to chose and could use only one amp , what would it be ? Amp for both IEM and full cans I have 64audio u18t and am thinking of getting full size cans. And would like to have just one amp. What would you suggest ?

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