Meze Audio ASTRU In‑Ear Earphones – Full Titanium Single Dynamic Driver IEM

Meze Audio ASTRU – A Statement Single Dynamic In‑Ear Monitor

The Meze Audio ASTRU is more than an in‑ear monitor; it is a full‑titanium statement piece with a high‑performance single dynamic driver that delivers visceral, immersive sound in an ultra‑refined, compact body.

ASTRU elevates simplicity to a new level of performance, combining the coherence of a single driver with the layering, imaging, and detail usually associated with multi‑driver IEMs, while preserving the natural warmth and tonal density of dynamic designs.

Visceral, Immersive Sound

ASTRU invites you on a journey where music feels tangible and lifelike.

• Dense, powerful sound that is rich, full‑bodied, and highly engaging.
• Realistic, impactful presentation with immersive imaging and strong dynamics.
• Cohesive, unified tuning that keeps the entire frequency range coherent and natural.

High‑Performance Single Dynamic Driver

At the core of ASTRU is a 10 mm single dynamic driver with a multilayer metal‑coated composite diaphragm, engineered for exceptional control, resolution, and refinement.

• Multilayer composite diaphragm with a metal‑coated dome for speed and accuracy.
• Single‑driver architecture for phase‑coherent, highly natural sound.
• Designed to combine multi‑driver‑like layering with the organic timbre of a dynamic driver.

80‑Layer Gold & Titanium Multilayer Coating

The diaphragm dome uses an advanced multi‑stage coating process to optimize stiffness, damping, and transient response.

• Outer gold coating applied in 80 ultra‑thin layers via physical vacuum DC magnetron sputtering over a 48‑hour process.
• Titanium layer bonded to a PEEK dome base for ideal rigidity and resonance control.
• Delivers smoother high frequencies, greater extension, and more natural, lifelike transients.

Sound That Breathes – Rear Venting & Pressure Relief

The rear vent design equalizes pressure between the driver’s back cavity and the outside environment.

• Unrestricted low‑frequency excursion for extended sub‑bass and bass output below 200 Hz.
• Continuous ear canal pressure relief for fatigue‑free, long‑term listening sessions.
• Natural bass with depth and impact that remains controlled and comfortable over time.

Pure Titanium Shell – CNC‑Machined, One‑Piece Housing

ASTRU’s housing is crafted from pure titanium, CNC‑machined from a single block into a one‑piece construction and then finished through a multi‑stage electroplating process.

• Lightweight yet exceptionally strong shell for durability and low resonance.
• Satin titanium finish for a smooth feel and enhanced wearing comfort.
• Each matched pair of shells requires up to 7 days of processing from machining to final finishing.

Ethereal Comfort – Ergonomic Shell Geometry

Building on the ergonomic foundations of Meze’s ADVAR and ALBA, ASTRU is shaped to map precisely to the natural contours of the ear.

• No pressure, no hotspots – the shell geometry is refined so it “disappears” in use.
• Every curve and surface is optimized for long‑term comfort and stable fit.
• Designed for listening sessions where you only notice the music, not the IEM.

Premium Silver‑Plated LC‑OFC Cable

The included 1.2 m (3.9 ft) cable is engineered specifically to unlock ASTRU’s full sonic potential.

• Silver‑plated Linear Crystal Oxygen‑Free Copper (LC‑OFC) conductors in a dual‑strand configuration.
• 161 conductors per strand for low resistance and high signal integrity.
• SoftFlex PVC insulation for flexibility and comfort during portable use.
• CNC‑anodized aluminum hardware with a gold‑plated 4.4 mm balanced termination.
• Optimized for low noise, durability, and compatibility with high‑end portable sources.

4.4 mm to 3.5 mm Adapter – Ready for Any Source

ASTRU is designed to work seamlessly with a wide range of DAPs and headphone amplifiers.

• Included female 4.4 mm to male 3.5 mm adapter for use with standard single‑ended outputs.
• Easy switching between balanced and unbalanced sources without changing the main cable.

Custom Liquid Silicone Ear Tips

To fully experience ASTRU’s tuning, a perfect seal is essential.

• Includes five pairs of custom liquid silicone ear tips (XS, S, M, L, XL).
• Tips are specifically engineered for ASTRU’s acoustic design to preserve bass texture and tonal balance.
• Using alternative tips may alter the sound signature and deviate from the intended tuning.

Nickel Wax Guard – Built to Protect

The nozzle features a precisely etched nickel wax guard that complements the titanium structure.

• Protects the acoustic filter from clogging and debris.
• Helps extend the lifespan of the IEM and maintain consistent sound performance.
• Subtle, functional detail that reflects Meze Audio’s attention to craftsmanship and durability.

Carrying Solutions – Pouch & PU Leather Envelope

ASTRU comes with two carry options tailored to different situations.

• Sturdy pouch for secure storage and travel protection.
• Soft PU leather envelope for lighter, everyday carry.

Meze Audio ASTRU – Concept & Philosophy

ASTRU means “star” in Romanian, symbolizing motion, art, and grandeur – a celestial body or an outstanding soul.

It represents the fusion of gravitational power and artistic finesse: a universe in the palm of your hand and a guiding light that illuminates your musical journey.

Meze Audio ASTRU Key Features

• Full‑titanium, CNC‑machined single‑piece shell with satin finish.
• 10 mm single dynamic driver with multilayer gold/titanium/PEEK diaphragm.
• Rear venting design for extended bass and pressure relief.
• Premium silver‑plated LC‑OFC 4.4 mm balanced cable with 4.4 to 3.5 mm adapter.
• Five pairs of custom liquid silicone ear tips (XS–XL).
• Nickel wax guard for long‑term acoustic protection.
• Two carry solutions: hard pouch and PU leather envelope.

Technical Specifications – Meze ASTRU In‑Ear Earphones

• Driver Type: Dynamic Driver
• Driver Size: 10 mm
• Frequency Range: 5 Hz – 35 kHz
• Sensitivity: 111 dB SPL/mW at 1 kHz
• Total Harmonic Distortion (THD): <0.1% at 1 kHz
• Impedance: 32 Ω
• Input Connector: 0.78mm CM 2‑Pin Connector
• Weight: 13.4 g (0.47 oz)