Eclipse 500 - 4 Drivers Universal In Ear Monitors - ACS Custom

Eclipse 500 - 4 Drivers Universal In Ear Monitors

Name: Eclipse 500 - 4 Drivers Universal In Ear Monitors
Brand: ACS Custom
Price: 1650.0 AUD
Availability: InStock
Rating: 5.0 (1 reviews)

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.

$1,650.00

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.

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

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")

Why not order custom fit soft silicon sleeves to fit the Eclipse 500 perfectly for your ears find out more here
ACS IEM Hardcase
ACS Go Link DAC Converter
Fiio BTR3 Bluetooth Headphone Amp

Overall rating: 5.0 / 5 from 5 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["iems","ears","clarity"].

Review highlights

Reviews

Comfortable and sounds so good!

"I’m seriously impressed with the ACS Eclipse 500s. They’re the only in-ears I’ve found that are this comfortable—thanks to the silicone, I can wear them for hours and my ears never feel tired. The sound is crystal clear across all frequencies, with a bass that’s just right: full and present without being overwhelming. On top of that, maintenance couldn’t be easier—I just pop the moulded part off and give it a quick rinse. Simple, comfortable, and great-sounding."

— Joshua D. (5/5)

Superb In-ears!

"I’ve tried all the others and the Eclipse 500’s win hands down! The soundstage is stunningly open and balanced and the custom moulds are really comfortable in my ears for longer periods in rehearsals / production rehearsals. Top drawer product"

— Marcus B. (5/5)

Review of the ACS Eclipse 500

"I recently picked up the ACS Eclipse 500, and I’m honestly blown away by the clarity and balance they deliver. Every detail comes through with incredible precision, making it easy to catch even the smallest nuances in a performance or recording. Thanks to the four drivers, the low end feels tight and controlled, the mids are smooth and natural, and the highs are crisp without being fatiguing—perfect for long sessions. Comfort-wise, these are some of the best IEMs I’ve worn. They sit securely without any pressure, and since no impressions are required, you simply adapt the foam size and choose the nozzle length that works best for you. That makes them practical not only for switching between studio work and live performance, but also shareable with other artists (with proper cleaning and switching to new foam of course). I can already tell they’ll shine on stage as much as in the booth. Their isolation and detailed ACS sound signature mean I can rely on them for accurate monitoring—whether I’m tracking voiceovers, drums, guitars, or performing live. Overall, the ACS Eclipse 500 feels like a serious upgrade: professional, comfortable, and versatile. For anyone looking for IEMs that can handle both recording and performance with precision, these are a fantastic investment."

— Toby M. (5/5)

I’ve tried all the others over the last 20 years and the Eclipse 500’s beat them all hands down!

"I’ve tried all the others over the last 20 years and the Eclipse 500’s beat them all hands down! The soundstage is really open and well balanced and the fit on the custom moulds is really comfortable . . especially over longer periods in rehearsals and production rehearsals. I’m really enjoying listening to music onstage and in the studio through my Eclipse 500’s !!"

— Marcus B. (5/5)

You absolutely need to try these for yourself!

"ACS have been a big part of my career journey since the mid 90s, first with hearing protection, then IEMs; dual-driver, triple, ambient. I’ve always got great value and longevity from my ACS products which get some seriously heavy usage. Due for an upgrade, I paid a visit to the Banbury HQ for a trial of their new 4-driver (with dynamic driver) system using the Eclipse 500 Universal, and although sceptical at first it left me in no doubt what my next custom purchase would be. I’ve been very happy with the fidelity, clarity and broad frequency range of all my previous ACS IEMs but the smooth, rounded and full-bodied low end of my Emotion Hybrid 4 Drivers Classics has to be experienced first hand to be believed. From only really getting true low end through my feet, delayed, from the sound system subs it now gets delivered in sync with the other frequencies straight to my ears under perfect control. As always with ACS the seal (and comfort) is superb, enhancing the sonic clarity of my monitor mix. In summary, you absolutely need to try these for yourself!"

— Steve T. (5/5)

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