[Review] Vortex Reference: A Monitoring Tool, But Not "Monitor"!

When you think of monitor earphones, do you usually picture them sounding a bit cold, or even a bit "clinical"? Actually, the Vortex Reference breaks this stereotype. As a brand that has long researched cables, Vortex wanted to create a tool that truly reflects the essence of sound without deliberate embellishment, letting you hear the audio in its most original form. It serves as the ultimate reference for audiophiles and seasoned enthusiasts to examine sound. Limited to just 100 pairs globally, each comes with an independent serial number, highlighting its rarity and uniqueness.

Earphone Design: 
The Combination of Dual MEMS Tweeters and Dual Dynamic Drivers

The Vortex Reference features the world's first passive dual MEMS tweeter setup, and it sounds truly special. It's not a traditional electrostatic tweeter, but a miniature planar diaphragm made with semiconductor technology, allowing high frequencies to extend far and clean, sounding as natural as air flowing past your ears.

As for the mid and low frequencies, they are handled by dual dynamic drivers. The 8mm aluminum-magnesium alloy dome bass driver, combined with a high-polymer PU suspension, delivers fast and deep bass, a wide dynamic range, and distinct layers. The 6.5mm midrange dynamic driver uses a three-layer composite titanium-plated diaphragm with high rigidity to effectively suppress distortion. Paired with a brass resonance chamber and a dual-layer voice coil design, it makes vocals and instruments sound incredibly rich and realistic.

Founder Oscar tried various combinations when selecting drivers before finalizing this configuration as the best to meet their standards. The internal components are equally meticulous, including American RA resistors, Japanese ELNA audio capacitors, and Vishay low-temperature drift capacitors, ensuring pure signals and extremely low distortion. This uncompromising design philosophy ensures every watt of power is accurately converted into sound.

Limited to 100 pairs worldwide, each pair has a unique serial number.

Wearing Experience:
Snug Fit and Excellent Noise Isolation

The earphone shell is crafted from high-precision CNC-machined aluminum alloy. The interior features a diamond-like cutting process, using geometric surfaces to achieve diffuse reflection of sound waves, reducing internal harmonics and standing waves, and lowering sound coloration. When you put them on, the earphones fit the ear canal perfectly, and the noise isolation is surprisingly good, allowing you to focus more on the music. This is very important to me; having a comfortable and quiet pair of earphones is truly an enjoyment. Paired with Nostalgia Audio XWB eartips and an extra-wide nozzle design, the sound enters the ear more directly and smoothly, maximizing the suppression of distortion and resonance, resulting in a more natural and precise sound.

High-precision CNC aluminum alloy machined shell, sturdy and lightweight, for purer sound quality.

    

Utilizes a 2-pin CM interchangeable cable interface.

Paired with Nostalgia Audio XWB eartips and an extra-wide nozzle, delivering sound directly and smoothly into the ear.

Dual Cables Reveal Different Sound Profiles

The earphones come with two cables: the Ultra Series Titan and the Zenith Series Iris, both using 4.4mm balanced and 2-pin CM connectors. The Titan cable sounds thicker and warmer, with full bass, kind of like stepping into a large soundstage. The bass is richly layered with excellent dynamic control, suitable for users who love both power and atmosphere. Conversely, the Iris cable leans towards an acoustic route. The sound is agile and precise, with smooth, airy highs, transparent midrange details, and tight, clean bass. It offers balanced tri-frequencies and strong resolution, perfect for those who want to hear every detail clearly.

Equipped with Zenith Series Iris (left) and Ultra Series Titan premium cables to meet different listening needs.

Iconic metal hollowed-out inverted triangle Y-split, showcasing a unique design aesthetic.

Both cables feature 4.4mm balanced plugs for stable audio transmission.

Sound Quality:
Faithfully Reflecting Differences in Recordings and Equipment

The Vortex Reference pursues an absolutely flat frequency response without deliberately coloring the sound, allowing users to hear the true face of the recordings and equipment. It acts more like a sound monitoring instrument rather than a typical earphone that emphasizes a specific sound signature.

When testing with the Astell&Kern SP4000 SS DAP, the highs are sharp but not piercing, piano gloss is natural, airiness is obvious, and guitars are transparent with a good sense of the instrument's body. Vocals are positioned slightly back but with clear articulation and strong dynamics, presenting a wide and imposing soundstage. Listening to Norah Jones' "Don't Know Why," the vocals are thick with a sense of breath, the piano details are rich and warm, and the strings are distinctly layered.

Switching to the HiBy RS8 II DAP, the sound becomes thicker with a stronger three-dimensional feel. Electric guitars are full, the bass is deep and punchy, and the drums have great penetration. Listening to Radiohead's "Everything In Its Right Place," the electronic elements are well-layered, the bass is steady and not muddy, and the vocals and synthesizers have a 3D spatial presence, creating an immersive experience.

The difference is obvious when swapping cables. The Iris cable tightens the mid-bass, making dynamics more restrained, and the spatial and layering sense isn't as grand as the Titan. When listening to Adele's "Hello," vocals are more direct with prominent details, but the bass punch is slightly weaker, giving an overall refreshing feel. The Titan cable, on the other hand, makes vocals thicker and warmer, with full and punchy bass, suitable for users who prefer a rich tone.

Listening to the guitar solo "Classical Gas," the Vortex Reference clearly captures the guitar's overtones and fingertip details. The soundstage is open, making you feel like you're at a live performance. With the Titan cable, the guitar's layering and airiness are richer, bringing the music more to life.

The Titan cable makes vocals thicker and warmer, enriching the guitar's layering and airiness.

The Iris cable tightens the mid-bass, making vocals more direct and detailed, offering an overall refreshing feel.

Conclusion:
The Audiophile's Touchstone for Sound

The Vortex Reference is a precision sound reference tool. From the drivers, cables, and shells to the circuit components, everything is designed to faithfully restore the essence of sound. It is not a typical earphone that emphasizes a specific tuning flavor, nor is it entirely the cold, sterile sound of traditional studio monitors. Instead, it allows you to clearly distinguish the subtle differences brought by various players and cables, letting you hear every layer of detail in the sound. If you are an audiophile who loves critical listening and pursues sonic realism, or if you need a sharp tool to help you monitor accurately, the Vortex Reference is definitely worth a try.Specifications

• Type: In-Ear Monitors (IEMs)
• Drivers: 4-Driver Configuration (2 x Passive MEMS Tweeters, 2 x Dynamic Drivers)
• Frequency Response: 10Hz to 80kHz
• Sensitivity: 102dB/mW
• Impedance: 23Ω
• Cables: Approx. 1.2m Ultra Series Titan silver-plated copper cable + Approx. 1.2m Zenith Series Iris silver-plated copper cable (both equipped with 4.4mm balanced plugs)

Source by : https://www.spill.hk/headphones/Vortex-Reference-review/