EarAcoustic SPA-Hi End Series IEM

EarAcoustic SPA-Hi End Series IEM – Redefining High-End Audiophile Listening

Discover the EarAcoustic SPA-Hi End Series, a pinnacle of innovation and acoustic engineering built for audiophiles who demand the very best. This high-end in-ear monitor series includes four premium models—SPA-Hi End, SPA-Hi End Ultra, SPA-Hi End MAX, and the SPA-Limited Edition—each designed to deliver a rich, immersive soundstage, low distortion, and remarkable detail retrieval.

Engineered with low impedance and high sensitivity, these IEMs are easy to drive while offering extraordinary sonic performance. The Ultra and MAX models elevate sound reproduction with higher thrust, while the Limited Edition model delivers intricate detail, exceptional warmth, and elite-grade durability.

Advanced Tesla Technology for True Audio Precision

At the heart of the SPA-Hi End Series lies an advanced dual magnetic Tesla coil design powered by a high-flux N52 magnet exceeding 10,000GS. This setup provides enhanced dynamic range, pinpoint accuracy, and a full-bodied listening experience, outperforming traditional driver configurations.

Revolutionary Diaphragm Design for Sonic Clarity

Featuring a Titanium Gold Ball Top diaphragm and double-sided vapor-deposition silicon crystal hanging edge, these IEMs deliver smooth frequency response with ultra-low distortion. With a Titanium vibration modulus of 105–110 GPa, they respond swiftly to audio signals, ensuring rich layers, precise imaging, and exceptional detail across genres.

Flagship-Level Acoustic Tuning

Crafted through hundreds of acoustic simulations, the SPA-Hi End Series is tuned to a flagship-grade target frequency response, offering a wideband range from 5Hz to 40,000Hz. This translates to expansive sound fields, engaging warmth, and realistic spatial imaging—perfect for critical listening and emotional musical connection.

Uncompromising Technical Specs

• Total Harmonic Distortion (THD): < 0.5% for pure, clean audio

• Intermodulation Distortion: < 0.05% for sonic clarity

• Sensitivity: > 109dB/mW for effortless driving

• Transient Response Time: < 3ms for rapid signal delivery

• Low-Frequency Rebound: ≈ 40ms for rich, textured bass

• Signal Attenuation: < 0.5dB for undistorted high-fidelity sound

Premium Build for Audiophile Comfort

Every model is ergonomically designed and built with precision:

• SPA-Hi End: 3D resin printing with matte silver finish

• SPA-Hi End Ultra: CNC-machined zinc alloy with mirror silver electroplating

• SPA-Hi End MAX: Aerospace aluminum alloy via five-axis CNC and mirror plating

• Shell Design: Uses 7075 ultra-strong alloy, diamond-cut textures, and resin coating

• SR Blue Label: Clearly marks the left ear for ease of use

Audiophile-Grade Coaxial Cable

Bundled with a high-definition coaxial audio cable, made of oxygen-free copper and silver-plated cores, the SPA series ensures minimal signal loss and interference. With a 0.78mm dual-pin design and 408 core strands, this cable offers crystal-clear transmission and unmatched durability.

Whether you're a critical listener, studio professional, or a passionate audiophile, the EarAcoustic SPA-Hi End Series IEM offers the perfect balance of cutting-edge technology, robust craftsmanship, and emotionally rich sound.