Final Audio S4000 In‑Ear Monitor IEM Earphones
50 Years of Japanese Acoustic Craftsmanship
The final Audio S4000 continues the legacy of Japan’s renowned audio brand final, which has built its reputation over fifty years through advanced driver engineering and a refined tuning philosophy. Drawing inspiration from acclaimed series such as Piano Forte and Heaven, the S4000 introduces new technologies to combine the precision of balanced armature drivers with the tonal character of metal housings, delivering a pure and emotionally engaging listening experience.
Mirror Image Dynamic Driver Module
In the S‑Series, final employs two open‑back full‑range BA drivers arranged in a mirror image configuration. This layout increases air throughput and helps the S4000 present an airy, extended sound with fine musical detail. By mirroring the drivers, their vibration behavior becomes more consistent, allowing resonances to cancel each other out and resulting in improved stability, lower distortion, and cleaner overall reproduction.
Tone Chamber System – Stainless Steel & Brass Acoustic Path
The S4000 housings are made from stainless steel with a blast finish, while the sound tubes are crafted from brass. As sound travels through the brass nozzle, it picks up a unique tonal character shaped by the metal’s properties. At the front of the nozzle, concentric circular elements form a narrow sound emission point, creating diffraction that enhances spatiality and immersion. This Tone Chamber System expands the perceived soundstage and wraps the listener in a more enveloping acoustic field.
Soft Silver‑Plated Cable & Fusion G Eartips
The final S4000 is equipped with a proprietary eight‑strand soft silver‑plated copper cable, designed to transmit smooth, clear mid‑high frequencies while minimizing handling noise and the “stethoscope effect” caused by cable friction. The 0.78 mm 2‑pin connectors and splitter share matching colors with the earphones, giving the entire system a cohesive, premium appearance.
To optimize sound transmission, final includes its next‑generation Fusion G eartips. These hybrid tips combine a high‑density foam surface for excellent sealing and comfort with a wide sound bore for extended treble and a spacious presentation. Grooved hard silicone in the sound tube adapts to different ear canal shapes, ensuring a stable fit and allowing fine details to be delivered clearly to the listener.
Tuning Orientation
Taking advantage of the acoustic properties of stainless steel, the S4000 emphasizes clear, bright mid‑high frequency imaging. It excels with pop, funk, and folk music, particularly in presenting guitars and vocals with crisp definition and engaging presence, while maintaining a natural, balanced overall tonality.
Product Specifications
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Driver: Two full‑range balanced armature drivers arranged horizontally
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Sensitivity: 112 dB
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Impedance: 48 Ω
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Shell Material: Stainless steel (blast finish)
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Cable: 3.5mm Soft silver‑coated 8‑core cable (0.78 mm 2‑pin)
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Cord Length: 1.2 m
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Weight: 28 g
