64 Audio Fourté Universal Hybrid In-Ear Monitors
Best hybrid monitors for audiophiles seeking deep bass and spatial clarity.
Experience unparalleled audio with the 64 Audio Volür, a 10-driver hybrid in-ear monitor. Its revolutionary True Isobaric bass system delivers deep, distortion-free lows, while tia™ waveguide technology ensures exceptional clarity and spatial detail. The Volür offers rich, analog-style mids and sparkling highs for an immersive soundstage. Customizable apex™ modules allow for personalized comfort and isolation. Crafted with a stunning Paua abalone faceplate, these IEMs blend visceral impact with top-tier resolution for a luxurious personal audio experience.
$2499.00
Owner Satisfaction
4.8
/ 5
Category Rank
28
/ 6142
#28 in Headphones
Price vs Category Average
+325%
Above average
Driver Configuration
2611
/ Dynamic Low Drivers (Isobaric), Mid BA, High-Mid BA, tia High BA
Who it's for
- Audiophiles craving an expansive soundstage and detailed high frequencies
- Long-session listeners needing reduced ear fatigue and pressure
- Bass lovers seeking impactful and textured low-end performance
Who should skip it
- Budget-conscious buyers avoiding high-end luxury investments
- Purists who prefer a strictly neutral or analytical sound signature
- Commuters requiring maximum passive noise isolation in loud environments
Performance breakdown
Bass Depth
True Isobaric drivers deliver visceral, distortion-free low-end impact.
Sonic Clarity
Tia waveguide technology ensures exceptional detail and high-frequency precision.
Build Quality
Matte aluminum housing paired with stunning Paua shell faceplates.
Fit Customization
Interchangeable Apex modules allow for precise control over isolation levels.
Soundstage Immersiveness
Refined internal architecture creates a wide, holographic listening experience.
Driving Efficiency
LID circuit maintains consistent performance across various audio sources.
Key Specs
Driver Configuration
2 Dynamic Low Drivers (Isobaric), 6 Mid BA, 1 High-Mid BA, 1 tia High BA
Frequency Response
5 Hz – 22 kHz
Sensitivity
103 dB/mW @ 1 kHz (94mV)
Impedance
6.3 Ω @ 1 kHz
Crossover
Integrated 4-Way Passive Crossover
Apex Isolation
-10 dB (mX), -12 dB (m12), -15 dB (m15), -20 dB (m20)
Shell Material
Matte Black Aluminum
Faceplate
Purple Paua Shell Chip (New Zealand sourced)
Features
- True Isobaric bass for deep, clean lows.
- tia™ waveguide for enhanced clarity.
- Warm, analog-style mids and vocals.
- Customizable Apex™ modules for personalized fit.
- Consistent sound with LID™ circuit.
- Luxurious Paua abalone faceplate.
- Premium accessory kit included.
- Refined internal architecture for efficiency.
What customers say
This audio device delivers an exceptional listening experience centered on superior sound quality and remarkable comfort. Listeners consistently praise the expansive soundstage and precise imaging, noting how clarity reveals subtle musical details across a balanced profile. The innovative comfort design actively reduces fatigue during extended use. While this is a significant investment, dedicated listeners find the reference grade audio performance and thoughtful engineering fully justify the cost, establishing it as a premier choice for critical enjoyment.
Know before you buy
The True Isobaric system uses two dynamic drivers working in tandem to produce deep, impactful bass while significantly reducing distortion. This design allows for a cleaner, more controlled low-end response compared to traditional single-driver setups.
Apex modules allow you to adjust the internal air pressure within the ear canal, which changes the level of passive isolation and the overall sound signature. By swapping modules, you can fine-tune the bass response and soundstage width to suit your personal preference or environment.
Yes, the Linear Impedance Design (LID) circuit ensures that the IEMs maintain a consistent frequency response regardless of the output impedance of your source device. This means the sound profile remains stable whether you are using a high-end dedicated amplifier or a standard portable player.
The Volür offers a balanced yet engaging sound profile characterized by rich, analog-style mids and vocals paired with the crisp, spatial clarity provided by the tia™ waveguide. It is designed to deliver a visceral, immersive experience that blends musical warmth with high-resolution detail.
Yes, the combination of the ergonomic universal shell and the pressure-relieving apex technology helps reduce ear fatigue during extended use. The lightweight aluminum construction also ensures they remain comfortable for hours at a time.
The tia (Tubeless In-Ear Audio) system removes the need for sound tubes and dampers, which can often cause resonance and unwanted reflections. By using an open-balanced armature design and a specialized waveguide, the Volür achieves a more natural, transparent high-frequency response.
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$2499