EarAcoustics Audio SPA-High End Ultra

SPA-Hi End Series: Superior Sound with Unmatched Durability

The SPA-Hi End Series offers an unparalleled listening experience with a stronger atmosphere, enhanced durability, and outstanding compatibility across a wide range of music styles. Featuring the SPA-Hi End, SPA-Hi End Ultra, SPA-Hi End MAX, and SPA-Limited Edition models, this series is designed to deliver beautiful sound with rich depth and full emotion. The Hi End models, known for their low impedance and high sensitivity, are easy to drive, making them accessible yet exceptional. The Ultra and MAX versions offer higher thrust capabilities, delivering even richer sound and greater potential. The Limited Edition model stands out with its intricate detail density, offering superior warmth and durability for a truly premium experience.

Advanced Dual Magnetic Tesla Coil with N52 Magnet

It utilizes dual magnetic Tesla coil technology, enhancing analytical precision and dynamic performance beyond conventional drivers. Its N52 high-power magnet, with a magnetic flux exceeding 10,000GS, provides a strong driving force, ensuring a full-bodied and immersive listening experience.

Cutting-Edge Technology for Exceptional Sound

The SPA-Hi End features a Titanium Gold Ball Top, combined with a double-sided silicon crystal hanging edge, showcasing an innovative frontier in audio technology. Its unique diaphragm design ensures extremely stable and pleasing details, delivering rich layers in the sound. The titanium metal vibration expansion modulus ranges from 105 to 110 GPa, enabling quick response to audio signals for a smooth frequency response and low distortion. The ultra-low distortion titanium diaphragm ball top further enhances sound clarity, while the ultra-wideband double-sided vapor deposition silicon crystal oscillator film hanging edge contributes to exceptional performance and precision.

Precision Acoustic Engineering with Flagship Frequency Response

SPA-Pro undergoes hundreds of directional simulation experiments to develop a standardized acoustic cavity structure, optimizing resonance and enhancing musical emotion. Designed with a flagship audio-grade target frequency response curve, it delivers a warm, immersive listening experience with an ultra-wide 5~40,000Hz range, creating an expansive sound field with precise imaging.

Superior Technical Performance for Pure Sound

Total Harmonic Distortion (THD): < 0.5% for a pure and natural tone

Sensitivity: > 109dB/mW for easy driving

Intermodulation Distortion: < 0.05% for a clean and lasting tone

Transient Response Time: < 3ms for fast, clear rhythms

Low-Frequency Rebound: ≈ 40ms for a strong, defined bass response

Signal Attenuation: < 0.5dB for transparent and delicate sound

Precision Engineering for Ultimate Comfort and Performance

The SPA-Pro Hi-End series meticulously sculpts both the inner and outer contours, optimizing every detail to deliver a tailored and comfortable wearing experience.

SPA-Pro Hi-End: Featuring 3D resin printing and precision matte silver spraying.

SPA-Pro Hi-End Ultra: Crafted with zinc alloy mirror silver electroplating and CNC post-treatment.

SPA-Pro Hi-End Max: Built with aviation-grade aluminum alloy, utilizing a five-axis CNC process and mirror silver electroplating.

Shell Surface Technology: Incorporates 7075 ultra-strong alloy, diamond-cut surface, and a crystal resin coating.

SR Blue Label: Clearly marks the left earphone for intuitive usability.

High-Definition Coaxial Bundled Audio Cable

The SPA series comes with a high-definition coaxial bundled audio cable made of oxygen-free copper and silver-plated texture. It is delicate, soft, tangle-free, and has strong anti-interference characteristics, which significantly reduce high-frequency signal loss, making music transmission more stable and high-definition, with clear details. The cable features a 0.78mm dual-pin design and up to 408 branch line cores.

Technical Details

Model

SPA Hi End

Unit

11.4mm Titanium Gold Ball Top + Silicon Edge Double-Sided Composite Diaphragm, Double Magnetic Circuit, Double Chamber Dynamic Surrounding Unit

Sensitivity

111dB

Impedance

23 ohms

Frequency Response Range

5-40,000Hz

Wire Specification

0.78mm dual-pin LiTZ coaxial bundle, oxygen-free copper and silver-plated wire mixed weave, 1.20mm

Unit

SPA Hi End Ultra

Sensitivity

11.4mm Titanium Gold Ball Top + Silicon Crystal Edge Double-Sided Composite Diaphragm, Double Magnetic Circuit, Double Chamber Dynamic Coil Unit

Impedance

110dB

Frequency Response Range

26 ohms

Wire Specification

5-40,000Hz

Model

0.78mm dual-pin LiTZ coaxial bundle, oxygen-free copper and silver-plated wire mixed weave, 1.20mm

Sensitivity

SPA Hi End MAX

Impedance

11.4mm Titanium Gold Ball Top + Silicon Crystal Edge Double-Sided Composite Diaphragm, Double Magnetic Circuit, Double Chamber Dynamic Coil Unit

Frequency Response Range

109dB

Wire Specification

30 ohms

Model

5-40,000Hz

Unit

0.78mm dual-pin LiTZ coaxial bundle, oxygen-free copper and silver-plated wire mixed weave, 1.20mm

Impedance

SPA Limited Edition

Frequency Response Range

11.4mm Titanium Gold Ball Top + Silicon Crystal Edge Double-Sided Composite Diaphragm, Double Magnetic Circuit, Double Chamber Dynamic Coil Unit

Wire Specification

111dB

Inside the Box

1 x EarAcoustic Audio SPA-Hi End Series

User Manual