64 Audio - U4s

In-Ears With 1 DD + 3 BA Drivers
Sale price₹ 114,990

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1. What is a Pre-Order product?
A Pre-order product is a product that we especially order for you from the brand. Once you place an order with us, we will order it from the brand for you.

2. How do I know when the product will be delivered?
There is a rough timeline on the product availability and once it has been confirmed with the brand, we will inform you.

3. Do you order the product from the brand as soon as I place the order?
We do not immediately order the product but add it in the upcoming order.

4. Will you be giving me updates?
Once we have ordered the product and have a confirmed timeline, we will give you an update.

5. I’d like to make changes to/cancel my order?
You can only cancel/make changes to your order until we place the order with the brand. Since the product is specifically being ordered for you, we will be unable to cancel/make changes once we order the product from the brand.

Free Shipping
7 Day Replacement Guarantee

In case you receive the 64 Audio - U4s with a manufacturing defect, please raise a return request within 7 days of delivery.

However, if you receive an incorrect / damaged / different product or one with missing accessories, please raise a return request within 24 hours of delivery. In case you receive a product with a missing, incorrect, or faulty accessory, you will be given a replacement accessory instead of the entire product.

Please make sure that the product is in the original packaging with all the accessories it came with. We'll also need an unboxing video and images of the parcel to investigate about the discrepancy. You may be asked to share images of the product and the packaging received for us to determine the damage or defect prior to approving the return request. The free replacement will be shipped only once the original order is returned.

A replacement will be issued only if:

- It is found to be defective
- It is determined that the product was not damaged while in your possession
- The product is not different from what was shipped to you
- The product is returned in original condition (with brand’s/manufacturer's box, MRP tag intact, user manual, warranty card and all the accessories therein)


Warranty & Services

Don't sweat it, this 64 Audio - U4s comes with a 1 Year warranty from 64 Audio that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about 64 Audio's warranty in India.

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Designed in

Balanced Sound Signature

Wired Earphones with a Balanced sound signature presents a precise sound and an enriching listening experience, where sounds are naturally presented without extreme emphasis on any region. With a pair of headphones with this sound signature, you can hear audio with clarity and detail. The sound is vivid and revealing, a perfect mixture of instruments and vocals, lows, mids, and highs. This sound signature works for most music listeners who like switching between various music genres like Classical, Jazz, Blues, Rock, Folk and Pop.

1 Year of

Ideal for Audiophiles

These earphones/IEMs are designed for discerning music lovers. If you are someone who cares about audio quality deeply, you'll want a pair of earphones/IEMs like these. You can expect them to present a Hi-Fidelity listening experience.

The audio quality exhibited by these earphones/IEMs is a beautiful mix of musicality, technical brilliance and high precision. These earphones/IEMs deliver a spacious and open soundstage with utmost clarity and detail. Delve into pure sonic bliss with these earphones/IEMs!

Best Suited for Portable Use

The ability to carry your favourite earphones/IEMs around is priceless for those who value them. These earphones/IEMs offer the ultimate portability experience without sacrificing sound quality. 

If you’re someone who appreciates cutting-edge engineering, quality sound and portability, look no further. These earphones/IEMs are designed to be trusty companions and are cleverly engineered with the latest technology to offer the ultimate combination of Portability & Hi-Fidelity.


3 BA + 1 Dynamic

Replaceable Cables

A pair of headphones with a replaceable cable has many benefits, and one of them is if the connecting cable has a problem, it doesn’t mean that you have to buy a new one. If the connecting cable gets pulled or damaged, you can replace it and keep using your good-old headphones or IEMs. This way, your headphones will be protected and will last longer. With the advancements in cable manufacturing, you now get a variety of replacement cables with various termination options, lengths and quality.

Tangle-Free Cables

Every time you reach for earphone/IEM cables to connect them to your earphones/IEM, no matter how neatly you "wrapped" them up, they end up in a giant Gordian knot of frustration. Tangled cables are the bane of modern existence, and everyone owning a wired pair of earphones/IEM can attest to this.

With advances in cable-making techniques and radical approaches to manufacturing, there are now several solutions to this universal problem. You get Flat cables, Mesh Design cables, cables coated with exterior covers and cables designed with a zipper style design to avoid Tangle and attempt to solve the issue.


64 Audio has been the pioneer and has developed some of the most spectacular in-ear monitors. With years of research & development, 64 Audio is proud to introduce its latest offering - the quad driver hybrid in-ear monitor U4s. It features ground-breaking patented technologies developed for its flagship products to bring a wider audience closer to its music. The 64 Audio U4s is a hybrid quad driver universal IEM that is sure to please that discerning audiophile in you.

Headphone-Zone-64 Audio - U4s
Headphone-Zone-64 Audio - U4s
Headphone-Zone-64 Audio - U4s


The 64 Audio U4s has a unique driver configuration consisting of a single dynamic driver, two balanced-armature drivers, and one patented tia driver; all weaved together with their patented Tia, LID, and Apex technology. By effortlessly providing a physically compelling sub-bass without bleed-in to the mid-bass, U4s sounds light on its feet. At all volume levels, a wide range of musical genres and recording methods respond well to balanced mid frequencies and a pleasing high-mid band that is present but not oppressive. U4s makes your music breathe and come alive!

Headphone-Zone-64 Audio - U4s


Tubeless In-Ear Audio (tia) is a patented IEM design methodology that aims to reduce unwanted resonance and distortion for a transparent and lifelike sound signature. Open-balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers make up the three main components of the tia system. The U4s feature two elements of the tia system: the tia driver and the tia single-bore design. Get the most refined performance ever imaginable with the U4s!

Headphone-Zone-64 Audio - U4s


A crossover circuit replaces traditional acoustic dampers, which can introduce unwanted distortion through vibration and air turbulence. Rather than using acoustic dampers to filter unwanted frequencies after the driver produces them, the electrical low-pass filter lowers distortion by eliminating unwanted frequencies before they reach the driver. Linear Impedance Design (LID) is a patented circuit that corrects the non-linear electrical resistance of the multiple driver sets comprising this 4-driver IEM. Varying source amplifier output impedance in devices like smartphones, body packs, DAC/amps, and DAPs typically results in varying frequency responses across them, depending on the increase in resistance. Restoring proper interaction with the source and preserving the desired sound signature enables a consistent reliable sound. The four-way crossover is elevated with the use of our proprietary electronic low-pass filter, reducing low-frequency distortion.

Headphone-Zone-64 Audio - U4s


The 64 Audio U4s explores a bold new colour aesthetic. The Slate Blue shell colour is influenced by some of the world’s most beautiful blue-dial timepieces. Muonionalusta meteorite bits served as inspiration for the distinctive faceplate pattern. Both the faceplate and shell’s illuminant properties give it a unique tone in varying lighting conditions. The anodized aluminium shell adds to the ergonomics making the U4s highly comfortable to wear for long listening sessions.

Headphone-Zone-64 Audio - U4s
Headphone-Zone-64 Audio - U4s
Headphone-Zone-64 Audio - U4s


The assortment of included apex modules and ear tips is an invitation to further shape the sound based on preference and source material. The ultra-low impedance premium silver-plated copper cable ensures unimpeded signal transmission. The dissemination of tia technology within 64 Audio's product range brings that classic 64 Audio sound signature to a new price point. Air Pressure Exchange (Apex) is a patented vent that releases air pressure in a sealed ear canal, all while retaining standard IEM levels of isolation. This design enables musicians and music enthusiasts to listen more comfortably for longer. The venting alleviates listener fatigue and allows for a much more realistic soundstage. Apex comes in four module variations for U4s: mX, m15, m20.

1 Year Warranty

Don't sweat it, this 64 Audio - U4s comes with a 1 Year warranty from 64 Audio that covers manufacturing defects. All products featured on Headphone Zone are backed by an original manufacturer's warranty.

Read more about 64 Audio's warranty in India.

Award-winning IEMs for Pro Musicians, and Audiophiles

64 Audio emerged when Vitaliy Belonozhko, the Founder and Chief Sound Designer, recognized the superiority of in-ear monitors (IEMs) over traditional stage monitors. Backed by his extensive experience as a sound engineer and a passion for music, he sought to create a superior in-ear monitoring solution.

Today, with a dedicated team, 64 Audio stands as a pioneer in innovative in-ear monitor manufacturing, aiming to redefine people's connection with music by delivering exceptional sound experiences and fostering meaningful relationships within the music community.

Explore Collection

"Overall, it’s very nicely balanced with a tastefully tuned bump in its pinna gain amplitude to counter those firm lows. Excellent bass response, Clean design lines, Comfortable fitting."

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"The treble of the U4s is very detailed, sharp and direct.Some higher notes, especially hard and fast hitting cymbals, can come across as thin."

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"Dynamics on the U4s are praiseworthy. This increases the loudness of the bass and treble, creating a greater sense of contrast."

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Head Fi

"The U4s, with its dynamic bass driver,I think 64Audio have been busy with their cross-over designs. When I had the U4t demo, I remember thinking, “that’s the low driver, oh there’s the tweeter."

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Major HiFi

"With IEM manufacturers seemingly in an arms race to create the most expensive IEMs imaginable.This may be my favorite 64 Audio release to date; not that it’s “The Best."

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Tech Power UP

"An excellent all-rounder that you can purchase now and not worry about outgrowing with time.I truly think the U4s is a new benchmark at the $1000 price range and possibly higher too."

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Our customer support is available Monday to Saturday: 10am - 7pm.Average answer time: 2-3 hours

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