Eclipse 500 – Hybrid Universal In-Ear Monitors

With over 30 years of innovation in custom in-ear monitors, ACS has set the standard for professional-grade audio trusted by musicians and audiophiles worldwide. The Eclipse 500 represents the pinnacle of that expertise—our finest universal-fit earphone yet.

Hybrid Design for Exceptional Sound
The Eclipse 500 is ACS’s first hybrid universal IEM, combining the rich, punchy low-end of a dynamic driver with the stunning detail and accuracy of balanced armature drivers. The result? A beautifully tuned sound signature featuring warm bass, clean mids, and sparkling highs with Hi-Res Audio certified extension.

Advanced Ambient Filter Technology
ACS’s innovative passive-ambient 17dB filter delivers natural sound isolation while allowing airflow in and out of the ear. This prevents the “plugged” feeling common with IEMs, reduces listening fatigue, and opens up the soundstage for an immersive, spacious experience—perfect for long sessions on stage or on the go.

Why Choose Eclipse 500?

• Hybrid driver setup: Dynamic + Balanced Armature
• Hi-Res Audio certified
• Passive-ambient filter reduces fatigue and enhances comfort
• Precision-tuned for musicality, clarity, and detail
• Designed and built with ACS’s renowned craftsmanship

Step into a new era of universal-fit performance with the ACS Eclipse 500—where premium sound meets all-day comfort.

What’s Included

• Eclipse 500 - Hybrid Four Driver In-Ear Monitors
• 1.5m 2-Pin Twist Copper Silver Cable
• Customisable Sound Nozzles: Standard, Short, Extended
• Slow Rebound High-Density Foam Ear Tips: Small, Medium, Large
• Leather Zip Case with Carabiner
• Step-Up Adapter (3.5mm to ¼")

Technical Specifications

• Frequency Response: 10Hz – 24kHz
• Impedance: 28 Ohms @ 1kHz
• Sensitivity: 108dB @ 1kHz

Driver Configuration

• Single Dynamic Bass Driver
• Dual Knowles Midrange-Treble Balanced Armature
• Single Knowles Super Tweeter Balanced Armature
• Passive 3-way Crossover
• Acoustically Tuned Sound Path Construction