Meze Audio Astru Flagship In-Ear Monitors (IEM)

Product Overview

ASTRU is more than an IEM, it is a statement piece. A full-titanium body, a single high performance dynamic driver, and a precisely tuned acoustic architecture work seamlessly together to deliver the layering, imaging, and resolution typically associated with multi-driver designs, along with the tonal density and natural warmth only a single dynamic driver can offer. Simplicity raised to the highest level of performance.

The sound signature is full-bodied, natural, and engaging: a rich, neutral tuning with realistic timbre, excellent resolution and detail retrieval, and strong dynamics and texture across the entire frequency range from a tight, impactful low end to transparent, extended highs that reveal fine musical detail without causing fatigue.

Design & Craftmanship

ASTRU's chassis builds on the ergonomic foundations of ALBA and ADVAR, further refined for improved long-term comfort. Each unit is CNC-machined from a single block of pure titanium, with multilayer electroplating to achieve a signature satin finish.

• Full-Titanium One-Piece Housing: CNC-machined for precision fit, durability, and a lightweight feel at just 13.4g (0.47 oz)
• Electroplated Satin Finish: Multilayer electroplating process delivers a refined, premium aesthetic
• Electroplated Nickel Wax Guard: Built-in protection without compromising sound transparency
• High-Quality 4.4 mm Balanced Cable: Silver-plated LC-OFC conductors, 161 conductors per strand, SoftFlex PVC insulation, CNC-anodized aluminum housings, and a gold-plated 4.4 mm balanced termination — optimized for signal purity, low resistance, and compatibility with high-end portable sources
• Included Accessories: 4.4 mm to 3.5 mm adapter, five pairs of liquid silicone ear tips (XS, S, M, L, XL), hard pouch, and PU leather envelope for everyday carry

Acoustic Engineering

At the heart of ASTRU is a 10 mm dynamic driver featuring an advanced multilayer metal-coated composite diaphragm, which results from a meticulous, multi-stage manufacturing process.

• Gold-Coated Outer Dome: 80 ultra-thin layers of gold applied via physical vacuum DC magnetron sputtering over a 48-hour process, ensuring unmatched consistency and controlled resonance;
• Titanium + PEEK Dome Construction: A titanium layer bonded to a PEEK dome base balances stiffness, transient speed, and resonance control;
• Precision Magnetic Architecture: A vented backplate, inner and outer ring magnets, and a front magnetic spacer work in concert for optimal driver excursion and dynamic linearity;