{{ 'fb_in_app_browser_popup.desc' | translate }} {{ 'fb_in_app_browser_popup.copy_link' | translate }}

{{ 'in_app_browser_popup.desc' | translate }}

ACS VIORA Universal In-Ear Monitors – Built for professional stage and studio monitoring, Truely restore the essence and sonic detail of the original track

ACS VIORA Universal In-Ear Monitors – Built for professional stage and studio monitoring, Truely restore the essence and sonic detail of the original track

Whether you're performing on stage or working in the studio, a monitor earphone should not make the music sound better, but to let you hear the essense and detail of the music.
VIORA features a flat frequency response tuning that faithfully reproduces original audio.


TAIWAN ONLY – Free Shipping OVER NT$500 on order

NT$26,800
{{shoplineProductReview.avg_score}} {{'product.product_review.stars' | translate}} | {{shoplineProductReview.total}} {{'product.product_review.reviews' | translate}}
{{amazonProductReview.avg_rating}} {{'product.product_review.stars' | translate}} | {{amazonProductReview.total_comment_count}} {{'product.product_review.reviews' | translate}}
Quantity Product set quantity
Add to Wishlist
The maximum quantity per submit is 99999
This quantity is invalid, please enter a valid quantity.
Sold Out

Not enough stock.
Your item was not added to your cart.

Not enough stock.
Please adjust your quantity.

{{'products.quick_cart.out_of_number_hint'| translate}}

{{'product.preorder_limit.hint'| translate}}

Limit {{ product.max_order_quantity }} per order.

Only {{ quantityOfStock }} item(s) left.

Please message the shop owner for order details.
Add to Wishlist
Description
Shipping & Payment
Customer Reviews
Description
Universal Fit, Tailored Comfort
Most universal-fit earphones on the market share a standard formula — reusing existing shell designs, combining them with new driver configurations and decorative faceplates, adding foam or silicone eartips and packaging, and they’re ready for sale.

However, the majority of these designs fail to take into account the individual differences in each person’s ear shape, canal angle, or depth.
Even if a listener finds a sound signature they love, a poor fit often forces them to look for another pair of earphones that actually fit their ears.

As a result, generic universal IEMs often suffer from:
– Ear pressure or pain after just one to two hours of wear (“about an hour in my ear holes … begin to hurt” — Reddit /r/inearfidelity)

– Loose seal or shifting shells, some users report that “the edges of the shell become uncomfortable after a few hours” (HiFiGuides Forum)

– Sound leakage leading to bass loss, causing the music to lose body and impact (“a poor seal will result in significant loss of bass response” — Sensaphonics)

Multi-Adaptive Wear Design MAWD™
When designing this new generation of universal in-ear monitors, our goal went beyond achieving perfect sound — we wanted every listener to truly experience and enjoy the sound we created.

Drawing on nearly 30 years of experience and data from crafting custom in-ear monitors, ACS developed the Multi-Adaptive Wear Design (MAWD™) — a system built to solve the long-standing fit issues of universal earphones.

MAWD is based on close to a million ear impressions collected from custom earphones and earplugs.
This data enabled us to create a uniquely contoured shell cavity, paired with a compound-angled sound port that adapts precisely to different ear shapes and canal orientations.

It also includes three interchangeable sound-tube lengths (4.1 / 4.75 / 5.45 mm) and seven sizes of memory-foam and silicone eartips, offering 21 fitting combinations.

MAWD accommodates the vast variety of ear shapes, canal angles, and depths — ensuring a secure, comfortable fit while preserving accurate sound delivery.

MAWD also features the “JANUS Dual-Mode Transform System”— allowing you to switch from Universal-Fit to Custom-Fit within 20 seconds.
This allows one earphone to deliver two distinct fit experiences: the everyday convenience of a universal design and the precise seal of a custom fit.
See below for detailed images and the introduction.

Whether you're performing on stage or working in the studio, a monitor earphone should not make the music sound better, but to let you hear the essence and detail of the music.
VIORA features a flat frequency response tuning that faithfully reproduces the original audio, allowing you to make accurate sound decisions while mixing or performing.

Acoustic performance tailored to the needs of on-site monitoring.�
✅ A Hybrid Design With 1 Dynamic + 3 Balanced Armatures for Full-Range Accuracy and Fast Response

✅ 
Slight forward midrange tuning to bring vocals and lead instruments to the front of the mix

✅ 
Tight, fast low-end with solid body but no muddiness

✅The highs are natural and transparent, with a wide extension and no harshness, remaining comfortable and perfect for long sessions.

✅ 
From rehearsal to stage, VIORA stays consistently precise, letting you focus on your performance.

ACS Live Sound filters are designed to meet the needs of musicians:
✅ Interact and communicate with teammates/audience without removing earphones, avoiding hearing damage from repeated removal.

✅ Restore the immersive feeling of playing live with a band. Reduce occlusion and hear your natural voice.

✅ 
Minimize fatigue caused by TVIG, maintaining monitoring quality.
      TVIG (Trapped Volume Insertion Gain) refers to the pressure buildup from reflected sound waves within a sealed ear canal, which can cause inaccurate monitoring.

✅ 
ACS Live Sound not only enhances wearing comfort but also enables earphones to deliver a more transparent, natural, and pressure-free listening experience.

JANUS Dual-Mode Transform System
Can a single pair of earphones offer two distinct listening experiences?

Previously, you had to choose between the convenience of universal eartips and the isolation of custom sleeves.
Now, with the ACS JANUS Dual-Mode Transform System, you can switch UNA from a universal-fit earphone to a tightly sealed custom-fit monitor in just 30 seconds.



4 Key reasons for VIORA + JANUS Custom Sleeves:
✅  Dual-Fit Design: Instantly switch from universal to custom-fit seal

✅ 
 Stable Sound: Get Identical tuning and sound across both modes — made for creating music

✅ 
 Flexible Upgrade: Start with universal, Upgrade to custom sleeves as needed

✅ 
 Twin Wear Mode: Use universal tips for daily isolation. Wear custom sleeves for on-stage monitoring

VIORA IS BUILT FOR REPRODUCING EVERY DETAIL THE MUSICIANS NEED TO HEAR!

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
  • Credit Cards 0% interest, 6 installment
  • zingala - BNPL by Chailease, No Credit Card Required – 3 Installments 0 Interests
  • zingala - BNPL by Chailease, No Credit Card Required – 6 Installments 0 Interests
Customer Reviews
{{'product.product_review.no_review' | translate}}