Meze Audio Astru Dynamic Driver In-Ear Monitors

ASTRU

CLARITY BEYOND SOUND

ASTRU [ˈas.tru] Romanian noun — STAR

Dynamic. Cosmic. Artistic. In Romanian, “ASTRU” is defined as either a celestial body or an illustrious soul.

Here, it means both - a fusion of immense gravity with artistic subtlety.

A universe in the palm of your hand. A guide meant to illuminate your musical journey.

• Visceral, full-bodied, rich-sounding audio
• High-performance 10 mm single dynamic driver with the resolution of a multi-driver configuration
• Multilayer composite dome: 80 ultra-thin gold layers + titanium coating over a PEEK membrane
• CNC-machined titanium chassis, precision-engineered for long-term comfort
• Electroplated nickel wax guard
• 1.2 m (3.9 ft) dual-strand cable with silver-plated LC-OFC conductors and SoftFlex PVC coating
• 4.4 mm female to 3.5 mm male adapter
• Five (5) pairs of liquid silicone ear tips included: XS, S, M, L, XL
• Hard pouch and PU leather envelope included for easier everyday carry

ONE IS ALL YOU NEED

ASTRU is more than an in-ear monitor; it is a statement piece: full-titanium, visceral sound, single dynamic. Simplicity raised to the highest level of performance.

It delivers a punchy, full-bodied, and rich, detailed sound – combining the layering and imaging associated with multi-driver IEMs with the tonal density and natural warmth dynamic drivers provide, all within a cohesive, unified presentation.

VISCERAL SOUND

Embark on a journey beyond listening into a realm where music becomes palpable.

Natural and powerful, its sound is dense, immersive, and engaging, creating a realistic, impactful, and all-encompassing presentation.

UNIQUE TO THE CORE

ASTRU is powered by a high-performance single dynamic driver featuring a multilayer metal-coated composite diaphragm, engineered for exceptional control and refinement.

MULTILAYER COATING

The diaphragm dome consists of an outer gold coating applied in 80 ultra-thin layers via physical vacuum DC magnetron sputtering over a 48-hour process, followed by a titanium layer bonded to a PEEK dome base. This multi-stage architecture delivers smoother high frequencies, greater extension, and more natural transient response.

SOUND THAT BREATHES

The rear vent equalizes pressure between the driver's back cavity and the exterior, allowing unrestricted low-frequency driver excursion for extended sub-bass and bass output (below 200 Hz), while continuously relieving ear canal pressure for fatigue-free, long-term listening.

PURE TITANIUM SHELL

Lightweight yet exceptionally strong, the IEM housing is intricately CNC-machined from a single block of pure titanium into a one-piece construction, then refined through a multi-stage electroplating process to achieve a smooth satin finish that enhances wearing comfort. One matched pair of shells requires up to 7 days of processing.

ETHEREAL COMFORT

Building on the ergonomic foundations set by the ADVAR and the ALBA, ASTRU maps to the natural contours of your ear with unprecedented precision - no pressure, no hotspots, only you and the music.

The shell geometry has been refined even further: every curve finished to perfection, every surface optimized for the kind of long-term comfort that makes the shell disappear from awareness.

HIGH-QUALITY CABLE

The included 1.2 m (3.9 ft) cable features silver-plated Linear Crystal Oxygen-Free Copper (LC-OFC) conductors arranged in a dual-strand configuration, with 161 individual conductors per strand. Insulated in SoftFlex PVC for enhanced comfort and flexibility, the cable incorporates CNC-anodized aluminum housings and a gold-plated 4.4 mm balanced termination.

The construction is optimized for low resistance, signal integrity, long-term durability, and seamless compatibility with high-end portable sources.

ADAPTABLE

The package also includes a female 4.4 mm to male 3.5 mm adapter, enabling compatibility with a wide range of DAPs and headphone amplifiers.

LIQUID SILICONE EAR TIPS

To fully experience the detail and bass response, achieving a proper seal is essential. ASTRU includes five pairs of custom-made liquid silicone ear tips, designed for superior comfort and effective passive noise isolation. Available in XS, S, M, L, and XL sizes.

BUILT TO PROTECT, MADE TO MATCH

Precisely etched from nickel and then electroplated to complement the titanium nozzle, the wax guard protects the acoustic filter from clogging, helping extend its lifespan. Functional, durable, and unmistakably Meze, it is a subtle detail that quietly safeguards every listening session.

POUCH & ENVELOPE

To suit different moments in your journey, ASTRU arrives with two pouches: a sturdy pouch for secure storage and travel, and a softer PU leather envelope for a lighter, everyday carry.

SPECIFICATIONS

• Driver Type: Dynamic
• Driver Size: 10 mm
• Frequency Range: 5 Hz – 35 kHz
• Impedance: 32Ω
• Sensitivity: 111 dB SPL/mW at 1 kHz
• Input Connector: 2-Pin
• Total Harmonic Distortion: <0.1% at 1 kHz
• Weight: 13.4 g / 0.47 oz (without cables)

INCLUDED ACCESSORIES

• 5 sizes of ear tips (XS, S, M, L, XL) with wax guard
• 2 carry solutions – a protective pouch and a soft PU leather envelope
• Premium dual 2-pin balanced cable that features CNC-anodized aluminum hardware and a gold-plated 4.4 mm balanced termination
• 4.4 mm to 3.5 mm adapter