SPA-Hi End Series – Flagship Audiophile Earphones with Premium Hi-Res Sound

Hear Every Detail with Stunning Clarity & Powerful Performance

The SPA-Hi End Series is engineered for listeners who demand exceptional audio quality, premium craftsmanship, and long-lasting durability. Designed with advanced acoustic technology and precision tuning, the series delivers rich detail, immersive depth, and emotionally engaging sound across every genre of music.

Featuring the SPA-Hi End, SPA-Hi End Ultra, SPA-Hi End MAX, and SPA Limited Edition, each model offers a unique balance of power, clarity, warmth, and technical performance for audiophiles and music enthusiasts alike.

Whether you enjoy deep bass, crystal-clear vocals, or expansive sound staging, the SPA-Hi End Series creates a truly premium listening experience.

Why Choose the SPA-Hi End Series?

Many earphones struggle with:

• Weak bass and flat sound
• Harsh highs and muddy vocals
• Poor detail retrieval
• Fragile cables and uncomfortable fit
• Limited soundstage and distortion at high volume

The SPA-Hi End Series solves these issues with advanced driver engineering, premium materials, and flagship-level acoustic tuning.

Advanced Dual Magnetic Tesla Coil Technology

The SPA-Hi End Series features a dual magnetic Tesla coil system combined with a powerful N52 high-flux magnet exceeding 10,000GS magnetic flux.

This advanced magnetic structure delivers:

• Stronger driving force
• Enhanced dynamic performance
• Improved analytical detail
• Faster response speed
• Fuller and more immersive sound

The result is powerful yet controlled audio reproduction with exceptional clarity and precision.

Titanium Gold Ball Top Driver Technology

Built with an 11.4mm Titanium Gold Ball Top composite diaphragm, the SPA series achieves excellent balance between speed, detail, and musicality.

Premium Driver Features

✔ Titanium diaphragm for ultra-low distortion
✔ Double-sided silicon crystal suspension edge
✔ Fast transient response
✔ Smooth frequency transition
✔ Enhanced detail resolution
✔ Rich layered sound presentation

The titanium vibration expansion modulus of 105–110 GPa allows rapid signal response while maintaining smooth and natural audio reproduction.

Expansive Hi-Res Frequency Response

The SPA-Pro acoustic system undergoes hundreds of directional simulation experiments to optimize resonance and emotional sound reproduction.

Frequency Range

5Hz – 40,000Hz

This ultra-wide frequency response delivers:

• Deep and impactful sub-bass
• Warm and natural mids
• Crisp, airy highs
• Excellent instrument separation
• Spacious soundstage with accurate imaging

Perfect for:

• Hi-Res audio
• Lossless streaming
• Gaming
• Movies
• Studio-quality listening

Superior Technical Audio Performance

Precision Specifications

• Total Harmonic Distortion (THD): < 0.5%
• Intermodulation Distortion: < 0.05%
• Sensitivity: >109dB/mW
• Transient Response Time: < 3ms
• Low-Frequency Rebound: ≈ 40ms
• Signal Attenuation: < 0.5dB

These technical enhancements ensure clean, transparent, and highly detailed sound reproduction with minimal distortion.

Premium Craftsmanship & Ergonomic Design

The SPA-Pro Hi-End Series is carefully designed for both luxury aesthetics and long-term comfort.

SPA-Pro Hi-End

• 3D resin printed shell
• Matte silver precision finish

SPA-Pro Hi-End Ultra

• Zinc alloy mirror silver electroplating
• CNC precision post-processing

SPA-Pro Hi-End MAX

• Aviation-grade aluminum alloy housing
• Five-axis CNC machining
• Mirror silver electroplated finish

Shell Surface Technology

• 7075 ultra-strong alloy construction
• Diamond-cut surface texture
• Crystal resin coating
• Ergonomic sculpted contours for comfortable wear

The integrated SR Blue Label clearly identifies the left earphone for easy usability.

High-Definition Coaxial Audio Cable

Included with the SPA series is a premium 0.78mm dual-pin LiTZ coaxial bundled cable crafted from oxygen-free copper and silver-plated mixed weave materials.

Cable Benefits

✔ Soft and flexible design
✔ Tangle-free performance
✔ Strong anti-interference shielding
✔ Reduced high-frequency signal loss
✔ Stable high-definition audio transmission
✔ Enhanced detail and clarity

The cable supports up to 408 branch line cores for superior conductivity and durability.

Technical Specifications

SPA Hi End

• Driver: 11.4mm Titanium Gold Ball Top + Silicon Edge Composite Diaphragm
• Sensitivity: 111dB
• Impedance: 23Ω
• Frequency Response: 5Hz–40,000Hz
• Cable: 0.78mm dual-pin LiTZ coaxial cable

SPA Hi End Ultra

• Driver: 11.4mm Titanium Gold Ball Top + Silicon Crystal Edge Composite Diaphragm
• Sensitivity: 110dB
• Impedance: 26Ω
• Frequency Response: 5Hz–40,000Hz
• Cable: Oxygen-free copper & silver-plated mixed weave cable

SPA Hi End MAX

• Driver: 11.4mm Titanium Gold Ball Top + Silicon Crystal Edge Composite Diaphragm
• Sensitivity: 109dB
• Impedance: 30Ω
• Frequency Response: 5Hz–40,000Hz
• Cable: LiTZ coaxial bundled cable

SPA Limited Edition

• Enhanced detail density and warmth
• Premium tuning refinement
• Double magnetic circuit structure
• Sensitivity: 111dB

What’s Included

• 1 × EarAcoustic Audio SPA-Hi End Series Earphones
• 1 × User Manual

Elevate Your Audio Experience

The SPA-Hi End Series combines cutting-edge acoustic engineering, premium materials, and luxurious comfort to deliver a flagship-level listening experience. From deep bass impact to crystal-clear vocals and expansive sound staging, every detail is crafted for pure musical enjoyment.