SPA-Hi End Series – Premium Hi-Fi Earphones with Powerful Bass & Crystal-Clear Audio

Experience Sound Without Limits

The SPA-Hi End Series is designed for audiophiles and music lovers seeking exceptional sound quality, premium craftsmanship, and long-lasting durability. Engineered with advanced acoustic technology and precision tuning, the series delivers immersive audio with rich depth, detailed vocals, and dynamic bass performance.

Featuring the SPA-Hi End, SPA-Hi End Ultra, SPA-Hi End MAX, and SPA Limited Edition, each model is carefully crafted to provide a unique high-fidelity listening experience with superior comfort and outstanding compatibility across all music genres.

From smooth vocals to deep sub-bass and expansive sound staging, the SPA-Hi End Series transforms every listening session into a premium audio experience.

Advanced Dual Magnetic Tesla Coil Technology

At the core of the SPA-Hi End Series is a powerful dual magnetic Tesla coil driver system paired with an advanced N52 high-power magnet with magnetic flux exceeding 10,000GS.

This innovative structure enhances:

• Dynamic performance
• Analytical precision
• Audio responsiveness
• Bass depth and control
• Overall sound immersion

The result is a fuller, richer, and more detailed sound signature that exceeds conventional driver performance.

Titanium Gold Ball Top Driver Technology

The SPA series utilizes an advanced 11.4mm Titanium Gold Ball Top diaphragm combined with a double-sided silicon crystal suspension edge for superior acoustic performance.

Key Benefits

✔ Ultra-low distortion sound reproduction
✔ Fast and accurate transient response
✔ Enhanced clarity and detail retrieval
✔ Smooth frequency transitions
✔ Rich layered sound presentation
✔ Improved vocal and instrument separation

The titanium diaphragm’s vibration expansion modulus of 105–110 GPa allows rapid response to audio signals while maintaining stability and precision.

Precision Acoustic Engineering

The SPA-Pro acoustic system is refined through hundreds of directional simulation experiments to optimize resonance and enhance musical emotion.

Designed with a flagship-grade target frequency response curve, the SPA series delivers:

• Warm and immersive sound
• Spacious soundstage
• Accurate stereo imaging
• Deep bass impact
• Smooth mids and sparkling highs

Ultra-Wide Frequency Response

5Hz – 40,000Hz

Perfect for:

• Hi-Res audio playback
• Lossless music streaming
• Gaming and movies
• Studio-quality listening
• Everyday premium entertainment

Superior Technical Performance

The SPA-Hi End Series is engineered to provide clean, transparent, and natural audio reproduction.

Technical Highlights

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

These specifications ensure accurate detail retrieval, fast rhythm response, and excellent tonal balance across every frequency range.

Luxury Craftsmanship & Comfortable Design

The SPA-Pro Hi-End Series combines ergonomic comfort with premium luxury materials for long-term durability and elegant aesthetics.

SPA-Pro Hi-End

• 3D resin printed shell
• Precision matte silver finish

SPA-Pro Hi-End Ultra

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

SPA-Pro Hi-End MAX

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

Advanced 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 convenient daily use.

High-Definition Coaxial Bundled Cable

The SPA series includes a premium 0.78mm dual-pin LiTZ coaxial bundled cable made from oxygen-free copper and silver-plated mixed weave materials.

Cable Features

✔ Soft and flexible texture
✔ Tangle-free performance
✔ Excellent anti-interference shielding
✔ Reduced signal loss
✔ Stable high-definition transmission
✔ Enhanced detail and clarity

The cable supports up to 408 branch line cores, ensuring reliable conductivity and long-lasting durability.

Technical Specifications

SPA Hi End

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

SPA Limited Edition

• Premium tuned composite diaphragm driver
• Enhanced warmth and detail density
• Superior durability and refined tuning
• Sensitivity: 111dB

Inside the Box

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

Perfect For

✔ Audiophiles
✔ Music enthusiasts
✔ Hi-Res audio lovers
✔ Studio monitoring
✔ Gaming immersion
✔ Mobile DAC users
✔ Everyday premium listening

Elevate Your Listening Experience

The SPA-Hi End Series combines advanced acoustic engineering, luxurious craftsmanship, and flagship-level performance to deliver truly immersive high-fidelity sound. Whether you crave powerful bass, crystal-clear vocals, or expansive sound staging, the SPA series is built to exceed expectations.