SPA-Hi End Series – Premium Audiophile Earphones with Powerful Bass & Crystal-Clear Sound

Experience Elite Audio Performance with the SPA-Hi End Series

Searching for earphones that combine premium sound quality, deep bass, exceptional clarity, and luxury craftsmanship? The SPA-Hi End Series is engineered for audiophiles who demand immersive sound, advanced acoustic technology, and long-lasting durability in every listening session.

Whether you choose the SPA-Hi End, Hi End Ultra, Hi End MAX, or the exclusive Limited Edition, each model is designed to deliver breathtaking detail, emotional depth, and a powerful atmospheric listening experience across every genre of music.

From warm vocals and rich mids to precise highs and impactful bass, the SPA series transforms everyday listening into a true high-fidelity audio experience.

Tired of Weak, Flat, and Lifeless Audio?

Many earphones fail to deliver balanced sound. You may experience:

• Distorted highs at loud volumes
• Weak bass without depth
• Muddy vocals and poor instrument separation
• Uncomfortable fit during long listening sessions
• Fragile cables and low-quality construction
• Earphones that struggle to drive properly on mobile devices

For music lovers and audiophiles, these issues ruin the listening experience and make premium music feel ordinary.

Discover Rich, Dynamic, and Immersive Hi-Fi Sound

The SPA-Hi End Series is built with cutting-edge acoustic engineering and flagship-grade components to produce a highly detailed, emotionally engaging sound signature.

Key Audio Highlights

✔ Advanced dual magnetic Tesla coil technology
✔ High-powered N52 magnet exceeding 10,000GS magnetic flux
✔ Titanium Gold Ball Top diaphragm for ultra-fast response
✔ Double-sided silicon crystal suspension edge for stability and precision
✔ Ultra-wide frequency response: 5Hz–40,000Hz
✔ Low distortion and superior analytical performance
✔ Deep bass, natural mids, and sparkling highs
✔ Excellent compatibility with multiple music genres

The result is a smooth, spacious soundstage with precise imaging and rich musical layering.

Advanced Acoustic Technology for Audiophile Performance

Dual Magnetic Tesla Coil Technology

The SPA series utilizes an innovative dual magnetic Tesla coil driver structure, significantly enhancing dynamic performance, responsiveness, and audio precision beyond traditional drivers.

Combined with the powerful N52 high-flux magnet, the earphones provide stronger driving force for fuller, more immersive sound reproduction.

Titanium Gold Ball Top Diaphragm

The advanced titanium diaphragm technology delivers:

• Faster transient response
• Improved detail retrieval
• Lower distortion
• Better frequency consistency
• Cleaner vocal reproduction

Its titanium vibration expansion modulus of 105–110 GPa allows the diaphragm to react rapidly to audio signals, preserving even the smallest nuances in your music.

Ultra-Wide Frequency Response

With an impressive 5Hz–40,000Hz frequency range, the SPA series reproduces everything from deep sub-bass to ultra-high frequencies with exceptional accuracy and realism.

Enjoy:

• Powerful low-end impact
• Rich and warm mids
• Crisp, airy treble
• Expansive soundstage
• Accurate instrument separation

Superior Technical Performance

Precision Audio Specifications

• THD: < 0.5% for natural and clean sound
• Intermodulation Distortion: < 0.05%
• Sensitivity: Up to 111dB for easy driving
• Transient Response: < 3ms for fast and accurate rhythms
• Low-Frequency Rebound: ≈ 40ms for punchy bass
• Signal Attenuation: < 0.5dB for transparent audio delivery

These specifications ensure a refined and highly detailed listening experience suitable for both casual listeners and serious audiophiles.

Premium Craftsmanship & Luxurious Design

Every model in the SPA-Pro Hi-End lineup is carefully crafted for comfort, durability, and premium 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 shell
• Five-axis CNC machining
• Mirror silver electroplated finish

Limited Edition

• Enhanced detail density
• Richer warmth and premium durability
• Exclusive tuning refinement

Premium Shell Technology

• 7075 ultra-strong alloy construction
• Diamond-cut surface finish
• Crystal resin coating
• Ergonomic contour design for comfortable wear

High-Definition Coaxial Audio Cable

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

Cable Features

✔ Soft and tangle-free
✔ Strong anti-interference performance
✔ Reduced signal loss
✔ Stable high-definition transmission
✔ Enhanced clarity and detail retrieval
✔ Up to 408 branch line cores

Perfect for achieving cleaner sound and long-term reliability.

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 bundle 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

• Premium tuned 11.4mm composite diaphragm driver
• Enhanced warmth and detail density
• Sensitivity: 111dB

What’s Included

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

Why Audiophiles Love the SPA-Hi End Series

✔ Exceptional clarity and sound separation
✔ Powerful and controlled bass response
✔ Premium materials and luxury finish
✔ Comfortable ergonomic design
✔ Easy to drive with mobile devices and DACs
✔ Perfect for Hi-Res music lovers
✔ Durable construction for long-term use