Employs Dual Full-Range BA Drivers In Horizontal Face-to-Face Configuration For Reduced Resonance

Final S4000 employs two full-range balanced armature drivers carefully matched to stricter standards than usual to ensure nearly identical acoustic behaviour. These drivers are arranged in a horizontal face-to-face configuration that cancels internal vibrations between them, minimising unwanted resonance generated by the drivers themselves. The drivers are also secured within the housing using minimal adhesive to preserve acoustic integrity.

Implements Tone Chamber System For Housing-Driven Acoustic Enhancement

Final S4000 implements a newly developed Tone Chamber System that unlocks new potential from the BA driver by introducing a dedicated acoustic space in front of the driver. This chamber allows the driver’s inherent acoustic characteristics to interact with and reveal the tonal properties of the housing material itself. Achieving this required extremely precise control of internal volume, with adhesive used only in areas that do not influence sound quality, enabling the structure to function with maximum accuracy.

Crafted In A Precision-Machined Stainless Steel Housing For High Rigidity And Sharper Tonal Character

Final S4000 utilises a housing constructed from high-rigidity stainless steel parts that are precisely cut and bead-blasted for exceptional structural accuracy. Compared to brass housings used in related models, this material choice contributes to a cleaner, more incisive presentation with enhanced clarity. The robust metal construction also supports the precise internal volume control required by the acoustic design.

Incorporates Cylindrical Fit Design For Optimised Wearing Stability & Reduced Cable Noise

Final S4000 incorporates a cylindrical body that supports both conventional insertion and over-ear wearing styles, prioritising optimal placement in the ear. The joint angle between the housing and cable connector is subtly adjusted to follow the contour of the body more naturally, improving comfort while reducing microphonic noise caused by cable contact.

Includes Fusion-G Triple-Hybrid Earpieces For Superior Isolation And Comfort

Final S4000 includes next-generation Fusion-G earpieces featuring a triple-hybrid construction of ultra-dense foam, soft silicone, and high-elastic silicone. This combination delivers both strong passive noise isolation and a comfortable seal, maintaining stability during extended listening sessions. Three sizes are provided to ensure a precise fit for different ear shapes.

Comes With A 8-Core Silver-Coated OFC Cable With High-Precision 2-Pin Connectors

Final S4000 equips a supple, easy-handling cable woven from an 8-core silver-coated oxygen-free copper conductor. The detachable design uses high-precision 0.78 mm 2-pin connectors, a widely adopted standard that ensures compatibility and durability while maintaining reliable electrical contact.

Implements Repairable Construction For Long-Term Serviceability

Final S4000 implements a structure designed to be disassembled using specialised tools, enabling maintenance and extending usable lifespan. Unlike many earphones that rely heavily on permanent adhesive bonding and cannot be repaired when damaged, this design supports long-term ownership. However, self-disassembly is not covered under warranty and should only be performed by qualified technicians.