CLARUS flagship in-ear monitor

A sound as clear and brilliant as starlight Following Zero1, Zero2, and Luna, CLARUS is Astell&Kern’s fourth flagship in-ear monitor, and our finest yet. Every product we make begins with a single belief: that sound should be heard exactly as it was meant to be. From the arrangement of every driver to the final voicing, CLARUS was engineered and tuned to that belief. It was developed and voiced on Astell&Kern reference systems, and tuned together with our flagship SP4000T player, so that what you hear is the true spirit of Astell&Kern. Named after the star in “Astell,” CLARUS was voiced to shine with the same quality a star does — clear, pure, and unwavering. Rather than highlighting one frequency or enhancing another, CLARUS delivers natural clarity evenly across the entire spectrum. It doesn’t color the music or draw attention to specific details—it simply lets the recording speak for itself, allowing you to experience the Astell&Kern sound in its purest, most luminous form. CLARUS is built on a precisely harmonized 9-driver tribrid architecture that combines a proprietary dynamic driver, seven Sonion balanced armatures, and a silicon MEMS tweeter within a single, coherent system. Each element was developed for its distinct role and tuned through precise control of phase, pressure, and motion. Its design reflects the same discipline that governs its form. Every contour, cavity, and circuit exists to serve acoustic integrity. The structure is shaped by performance, the performance defined by structure. Nothing is decorative, nothing is redundant. Every driver operates within its natural range, contributing its character without interference. No forced equalization. No artificial enhancement. Only precision through purpose. Acoustic Architecture Low-Frequency System: Proprietary 9 mm Dynamic Driver + Dual Sonion Balanced Armatures Midrange Array: Three Sonion Balanced Armatures High-Frequency System: Silicon MEMS Tweeter + Dual Sonion Balanced Armatures 6-Way Crossover Network controlling the full 9-driver tribrid architecture Material-Design Engineering SHELL – CLARUS features a CNC-machined shell crafted from aerospace-grade 6061-T6 aluminum and finished in anodized silver. The main body follows an organic ergonomic form, shaped for natural fit and stable contact within the ear. Its geometry is engineered for stiffness and resonance control, and the housing is defined by precision machining, structural integrity, and a clean industrial form. The alloy’s low density provides comfort while preserving strength and balance. FACEPLATE – The shell transitions into a multi-faceted faceplate, where precision-cut planes create depth, contrast, and controlled reflection across the surface. The anodized silver finish emphasizes the material character of the aluminum, highlighting the sharp geometry of the faceplate and the smooth curvature of the shell. Every edge, radius, and transition was modeled to direct light and form as one continuous surface. ERGONOMIC FORM – The shell follows an organic ergonomic form, sculpted for natural fit and stable contact within the ear. Every curve transitions smoothly from the faceted faceplate into the body of the housing. Machined to precise tolerances, the form balances comfort, isolation, and structural integrity, completing CLARUS as a single continuous industrial statement.