Audeze Euclid Review

Audeze Euclid

In this article we look at the Audeze Euclid IEM, selling for $1.299 USD.


Disclaimer: The Audeze Euclid IEM was sent to us by Audeze directly, in exchange for our honest review. Audeze is not related to Headfonia in any way. 


If you’ve been following the personal audio world for the last 10 years, then Audeze will ring many bells. The California, USA based company completely changed and upped the headphone game to new levels. Bio from the Audeze site:

Audeze’s origins go back to 2008 when founders Sankar Thiagasamudram and Alexander Rosson met engineer Pete Uka who developed specialized flexible circuit materials for NASA. They quickly realized the material might be perfect for headphones. That’s when Dragoslav Colich, who has 30+ years’ experience in designing planar drivers, joined the team as CTO to create the LCD-1 headphone.

We’ve reviewed almost all of the Audeze products here on Headfonia, the latest one being the LCD-i4, Mobius, LCD-MX4 the LCD-2 Classic, the LCD-1 and the Penrose headphone.

Planar Magnetic Technology

As the Euclid is a planar magnetic technology IEM, we’re giving a short summary of the tech for those not familiar with it.

Audeze feature proprietary planar magnetic designs with extremely thin-film driver materials and powerful custom magnets. Planars overcome many limitations inherent in typical cone drivers; our lightweight diaphragms are, for example, faster and more responsive than heavier moving-coil or dome drivers. Planar magnetic diaphragm also have a voice-coil circuit spread across the diaphragm surface. The diaphragm’s voice-coil circuit interacts with the magnetic field to produce an electromagnetic force that moves the diaphragm back and forth creating the sound you hear when energized by an audio signal.

If you want to read more about the technology, you can do this here:

Audeze Euclid

Audeze Euclid

The Euclid is Audeze’s first planar magnetic IEM which has a closed back design. The miniaturized 18mm single planar magnetic driver has no crossovers and that, according to Audeze, is resulting in superior cohesion across the entire frequency spectrum. The Euclid is engineered for an incredible 105 dB/mW efficiency and a max SPL well over 120dB, which is pretty impressive.

You can find out all about the Audeze Euclid on its dedicated webpage here:

The Euclid’s 18mm planar magnetic drivers incorporate Audeze’s patented Fazor™ waveguides to eliminate the phasing and distortion typical of most closed-back dynamic in-ears. The efficient single driver design also includes their patented Fluxor™ magnets and Uniforce™ voice coils to further reduce distortion, improve sensitivity, and create superior coherency across the entire frequency spectrum.

Here’s the Euclid’ s presentation video:

The Audeze Euclid’s price is set at $1,299 USD, positioning it in the high end sector.

Technical Specifications

Style: In-ear, closed-back

Transducer type: Planar Magnetic

Magnetic structure: Fluxor™ magnet array

Phase management: Fazor™

Magnet type: Neodymium N50

Diaphragm type: Ultra-thin Uniforce™

Transducer size: 18 mm

Maximum SPL: >120dB

Frequency response: 10Hz – 50kHz

THD: <0.1% @ 100 dB SPL

Sensitivity: 105 dB/1mW (at Drum Reference Point)

Impedance: 12 ohms

Max power handling: 500mW

Min recommended power: > 50mW

Wired connection: Braided MMCX

Weight: 15g/pair without cable

Sound port diameter: 5mm

Box & Accessories

For this kind of money you expect a high quality package and a full set of accessories. Audeze here doesn’t disappoint, though the packaging itself is not very special.

The Euclid however comes with a very comprehensive set of accessories, which make you forget all about the simple box and foam interior. You get all of the following:

  • A user guide & Driver download card
  • A certificate of authenticity
  • A lovely soft carrying pouch
  • A pelican hard case
  • A shirt clip
  • A cleaning tool
  • 1 set of Spinfit tips (S/M/L)
  • 1 set of Foam tips (S/M/L)
  • 1 set of normal silicone tips (S/M/L)

That’s a very complete package where only a cleaning cloth is missing. Check it out for yourself here:

Design & Housing

The Audeze Euclid has a precision-milled aluminum body and each monitor is smoothly contoured with an elegant matte black finish. The face plate shows the Audeze logo and that sits on a layer of carbon fiber, making it look really nice. Audeze describes it as a look that doesn’t sacrifice elegance for comfort.

The ear pieces are not the biggest but they’re not small either, so the units do stick out of your ears quite a bit, but it’s still acceptable. This of course strongly depends on the shape of your ears, but listeners with smaller ears will for sure notice this.

Design-wise I like these IEMs: smooth edges, discrete L/R markings, a pretty face plate and eye for detail with a golden ring in the middle of the shell. The nozzle size is reasonably normal. The length is actually short, but because of the typical design of the shell, it looks quite long. The width of the nozzle is quite large, so this should be taken into account if you have small canals, especially of you want to use foam tips.

Audeze Euclid

Talking about the nozzles, you’ll find that there is no mesh grill covering it, so make sure you keep your ears, and the nozzle clean. In fact when you look inside the nozzle you’ll see that there is some kind of foam, or fabric stuffed inside. Special.

All-in-all a pretty design and a great looking IEM.

The article continues on the next page. Click here or use the jump below.

Page 1: Audeze, Planar Magnetic Technology, Euclid, Specifications, Box & Accessories, Design & Housing

Page 2: Build Quality & Cable, Fit & Comfort & Isolation, Sound Intro, General, Classics Part 1

Page 3: Sound Classics Part 2,  Sources, Comparisons, Conclusion

4.1/5 - (171 votes)

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 June 8, 2021

    Michael Koller

    Interesting – how does it compare with the following: a) Obravo EAMT and b) Cupid. Also interesting would be a comparison with CA Solaris
    Thanks Michael

  • Reply June 8, 2021

    Jeremy H

    Thanks for your review. Can’t wait to have the opportunity to try those one day. Do you have a Campfire Solaris to compare to? That’s one I liked a lot when I tested them, and it’s on my list of IEM to buy when money is not a problem anymore… But I am a full size Audeze owner, and those may be a good fit for both the sound signature and for my pocket (after emptying it of my money of course).

  • Reply June 9, 2021

    Tark P

    The open-back-like soundstaging is very surprising given the size of these. I wish the Reveal+ plugin wasn’t so expensive. I’m curious as to how much the soundstaging changes on the Euclid’s by the use of the head-related transfer function.

    Can you please compare them to the Audeze i3/i4? It seems like the driver miniaturization is a progression from that model. What do you make of the Cypher(DSP) tech not being used in this model?

  • Reply June 13, 2021

    deniz eylül parlak

    hey lieven can u compare it with xelento ?

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