Audeze Euclid Review: Mastering Planar Sound in Closed-Back IEMs

Explore the precision and rich detail of Audeze Euclid planar magnetic in-ear monitors that redefine high-end audio with balanced, immersive sound.

Audeze Euclid: A New Frontier in Planar Magnetic IEMs

For nearly 15 years, California-based Audeze has been a pioneer in planar magnetic headphone technology, consistently delivering premium sound that matches its premium price tags. But when it comes to closed-back in-ear monitors (IEMs), the challenge intensifies. These devices must be compact and lightweight without compromising the hallmark clarity and sound precision of Audeze’s planar drivers.

The Audeze Euclid has officially arrived on the scene, but it commands a hefty price of $1,299. Having recently tested the wired Sennheiser IE600 IEMs—which already felt pricey—it's clear that Euclid faces a tough task justifying its cost. But for audiophiles, the question lingers: does the Euclid’s planar magic live up to the hype?

Premium Availability and Service Considerations

Though Audeze Euclid is a global premium product, in some markets, including specialty audio salons and high-end stores, these IEMs are often available by order only or in limited quantities. Their price range typically stays near $1,350 to $1,600 USD, making them a serious investment for dedicated enthusiasts.

One important caveat for owners is after-sale service. Repairs can be time-consuming due to the need for original parts shipped from overseas. Also, to truly unlock Euclid’s full sonic potential, pairing these IEMs with a quality portable player or DAC is essential—a market segment with many excellent options from brands like FiiO, iBasso, and Astell&Kern.

What’s Inside the Euclid? Engineering Marvel Meets Elegance

When discussing wired in-ear monitors, features are often straightforward. But Euclid proves that a few well-executed features can make all the difference.

The Euclid comes with two braided, detachable cables using MMCX connectors: a 3.5mm single-ended and a 4.4mm balanced option. For wireless convenience, Audeze includes a Bluetooth adapter cable that links the two buds, delivering up to 8 hours of battery life with Micro-USB charging and support up to aptX HD codecs.

The real star, however, lurks beneath the surface. Audeze ingeniously fits an ultra-thin 18mm Uniforce planar magnetic driver inside the relatively tiny closed-back housing. This is enhanced with Fazor waveguides and Fluxor magnets, an intricate design that minimizes phase distortion and dramatically reduces audio distortion—normally a tall order for closed IEMs.

This technology is essentially a miniaturized version of Audeze’s signature, perfected over years—but shrinking it to fit inside such a compact form factor is a remarkable engineering triumph.

Performance: Precision Meets Depth

Using Euclid wirelessly means relying on the built-in 24-bit DAC, but wired connection demands more care—connecting these to just any laptop won’t cut it. A quality USB DAC is the bare minimum to unleash Euclid’s capabilities.

The audio experience is rich and nuanced—packed with so many subtle details it's almost overwhelming. At first, bass might seem surprisingly restrained, fast, and controlled. You might wonder, “Where’s the punch?”

But listen longer, and the bass reveals itself as deep and textured. The dynamics and attack-decay precision give it a clean, almost clinical quality that may initially sound “dry” until your ears adjust.

Beyond bass, the Euclid dazzles with astounding detail retrieval. No matter how fleeting or background a sound is, it surfaces with context and clarity across the entire frequency range—from punchy lows to shimmering highs.

But the undeniable star is the midrange. Vocals, in particular, are lush, expressive, and remarkably lifelike. The detailing here is as pronounced as anywhere else in the spectrum, creating an intimate and engaging listening experience.

Rhythmically, Euclid shines thanks to its articulate bass and impressive dynamic range. The soundstage is wide, well-focused, and stable, offering an immersive spatial experience that’s as convincing as it is expansive. If there’s one word to describe Euclid’s signature, it’s “convincing.”

Design and Comfortable Fit: Function Dictates Form

Form follows function, especially with in-ear monitors. Euclid needed to fit comfortably in a wide range of ear sizes while signaling their upscale status.

Audeze nailed it. These IEMs are slightly larger due to their sizable drivers, but at only 7.5 grams each, they never feel cumbersome. The CNC-machined aluminum body feels solid and luxurious, complemented by a glossy carbon fiber lid emblazoned with a striking logo.

For fit customization, Euclid offers three sizes (S/M/L) of three ear tip styles: Audeze’s own silicone, Comply foam tips, and SpinFit silicone tips. If you struggle to find a secure, comfortable fit with these options, the issue is probably your ears, not the headphones.

The Euclid’s “twist-lock” design secures the buds in place, while detachable cables feature ear hooks to keep everything snug—perfect for active or on-the-go listening.

Verdict: Balanced Brilliance for the Audiophile

Some listeners might expect more sheer power or aggressive expression for the price, but Audeze charts a different course. Euclid delivers balanced, truthful, and realistic sound with a laser focus on detail, accuracy, and scale.

Feed them top-tier source material and high-quality files, and these IEMs will not just meet but exceed your expectations with unwavering confidence.

Comparing Alternatives: Sennheiser IE600

While the Sennheiser IE600 delivers solid performance at just over half the price of Euclid, it falls short in some key areas. The IE600s are smaller but not necessarily more comfortable. They excel at detail retrieval and bring a bit more bass power, but can’t match Euclid’s commanding soundstage, dynamic range, or sonic scale.

In short, IE600 is an excellent mid-tier choice, but Euclid is in a league of its own when it comes to immersive planar magnetic sound.

The soundstage, created and described by Audeze, is vast in all directions, absolutely stable in terms of focus, and convincing in every other respect.

FAQ

• Are Audeze Euclid IEMs suitable for casual listeners?
  Euclid’s premium pricing and precise sound signature are best appreciated by audiophiles or serious music lovers who invest in high-quality source gear.
• Can I use Euclid with my smartphone via Bluetooth?
  Yes, the included Bluetooth adapter provides wireless listening with up to 8 hours battery life and supports high-quality codecs like aptX HD.
• What makes planar magnetic drivers in Euclid special?
  Their design reduces distortion and phase issues common in closed IEMs, delivering detailed, accurate sound across the spectrum.
• How important is the choice of ear tips for Euclid?
  Very important. Audeze offers multiple tip types and sizes to ensure optimal comfort and sound isolation.
• Is a separate DAC necessary to get the best from Euclid?
  To unlock Euclid’s full potential, a quality USB DAC or portable player is highly recommended rather than relying on built-in laptop or smartphone outputs.

Bring home the sound of precision and passion. Shop your favorite album cover posters at our store and let your music space reflect the artistry of the Euclid experience.