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ACS UNA Universal In-Ear Monitor — The Ultimate Entry Choice for the New-Gen Music Enthusiast

ACS UNA Universal In-Ear Monitor — The Ultimate Entry Choice for the New-Gen Music Enthusiast

Put it on and feel the pure sensation of music - whether you're listening to the latest pop hits, engaging in an intense game, or watching an action-packed blockbuster movie, the ACS UNA delivers sound beyond your wildest dreams!


TAIWAN ONLY – Free Shipping OVER NT$500 on order

NT$12,800
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Description

ACS UNA – Entry Model of the All-New Universal Monitoring Series

Designed with a sleek, minimalist black aesthetic, UNA features a matte aluminum shell paired with detachable matte black faceplates, exuding understated sophistication. It comes equipped with the silver ACS Vintage Series cable. It utilizes a 0.78mm 2-pin connector and is intricately woven with four strands of 4N OFC silver-plated copper for durability and stable signal transmission.


At its core, UNA houses a custom-designed 10mm dynamic driver by ACS, delivering deep and impactful bass, smooth vocals, neutral instrument reproduction, and refined, transparent mids and highs. Compared to its predecessor, EVOKE, UNA is tuned to better suit the bass-driven style of modern pop music, making it an excellent choice for music, gaming, and movies with its immersive, theater-grade audio experience.


This new series introduces ACS’s exclusive LiveSound Filter and 3D-printed Tuned Vented Chamber, meticulously optimizing frequency response. These innovations reduce ear fatigue from prolonged listening, significantly minimize the sensation of pressure buildup, and improve ventilation for a more open and natural soundstage. Simply put, UNA makes everything—music, gaming, and movies—sound more like a live experience!

Universal Fit with Custom-Like Comfort:
When we set out to create the new universal monitoring earphones, our goal was more than just achieving perfect sound—we wanted to ensure everyone could truly hear our perfect sound.

Drawing from over 20 years of experience crafting custom in-ear monitors, ACS has applied this knowledge to create a universal fit that accommodates a wide range of ear shapes and sizes, ensuring comfort and optimal sound delivery.

LiveSound: Natural Music, Natural Life
UNA’s LiveSound acoustic design originated on stage, but it proves even more valuable in daily life. From sound clarity to safety and comfort, it elevates the listening experience beyond expectation.

Five Everyday Advantages:
🎵 Open Soundstage, No Claustrophobic Pressure
More spacious and airy than traditional IEMs, music feels relaxed and real.

🏃‍♂️ Environmental Awareness, Safer Runs
Stay aware of cars and alerts without turning off your music—perfect for outdoor runs.

📞 Stay Connected to Your Surroundings
Hear phones ringing and people calling your name. Ideal for work and commuting.

🗣 No Occlusion, Clear Natural Voice
Our vented filters eliminate boomy internal echoes, so you can speak and hear yourself naturally.

😌 Less Pressure, Less Fatigue
Enjoy long listening sessions—play entire albums or binge your favorite songs in comfort.


🎧 Can you have two realms of sound with a single pair of earphones?
In the past, you had to choose between the convenience of universal fit or, the isolation and focus of custom fit.
Now, with the ACS JANUS series, you can upgrade your UNA directly into a custom earphone.

4 Key reasons for UNA + JANUS Custom Sleeves:
✅ DualFit Transform – One earphone, two ways to wear: universal or custom
✅ Consistent Sound – Signature tuning preserved across both fits
✅ Immersive Upgrade – Switch from casual listening to closed-back depth
✅ Freedom to Choose – No pressure to go custom on day one—upgrade when you're ready

Shipping & Payment

Delivery Options

  • Taipei – Store Pickup
  • Taiwan – Express Home Delivery (No home delivery service in remote areas of Taiwan and outlying islands)
  • [All Products] – SF Express Delivery : Hong Kong
  • [All Products] – SF Express : Macau
  • [All Products] – S.F. Express: China Mainland East, Central, and South China. China's mainland Inner Mongolia, Xinjiang, Qingkang Tibetan areas, please contact us separately.
  • [All Products] – SF Express : Japan
  • [All Products Except for Custom Monitors & Communication Earpieces] – SF Express : South Korea, Singapore, Malaysia
  • [All Products] – SF Express : Vietnam, Thailand

Payment Options

  • Credit Card
  • ATM Virtual Account Code Payment
  • LINE Pay (Taiwan Credit Card Accounts Only)
  • CVS (Print out the bills by CVS and pay in the store)
  • Barcode (Pay at convenience store by barcode)
  • Credit Cards 0% interest, 3 installments
  • zingala - BNPL by Chailease, No Credit Card Required – 3 Installments 0 Interests
Customer Reviews
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