
TRY BEFORE YOU DECIDE
You have 30 days to try it, use it, and love it — if you don’t fall in love by that time, reach out to our team to initiate an easy return and refund process.

HANDBUILT ON THE EDGE OF THE ALPS
All our products are handbuilt in Europe, from premium, sustainably sourced materials. Individually tested and measured.

5 YEARS LIMITED WARRANTY
We trust our products and we build them to last. Our 5 year warranty program is a testament to our commitment to quality.
YOUR FAVOURITE RECORDING HEADPHONES
NOW UPGRADED WITH REQUESTS FROM OUR COMMUNITY
Better sound isolation.
More space for your ears.
Flatter frequency response.
Angled cable and improved headband for max comfort.

SOUND SEAL ACOUSTICS
• CLOSED BACK DESIGN
100% separation of front and back earcup cavity for maximum transient response and noise cancellation.
• MINIMAL SOUND LEAKAGE
We designed the S4R 1.1 with as little leakage out as possible without compromising frequency response or comfort.

ORGANIC ESTHETICS
• EAR FATIQUE NO MORE
A perfect combination of velour earpads, self-adjusting strap and balanced sound will enable you to work on headphones for hours.
• PREMIUM MATERIALS
Pair stainless steel, nautical leather, velour, aluminum and wood and you are in for a treat.
• ANGLED CABLE
To extend durability and lifetime of cable connectors and to ensure the cable is not in the way of recording artists' performance.

BUILT TO LAST
• WE MEASURE EVERY PAIR
Every unit is individually tested and measured and comes with the frequency response measurements chart in the package.
• SERVICEABLE
Every headphones's part can be purchased in our store and replaced with home tools.
• UPGRADABLE
We are on a mission to offer our customers the possibility of an upgrade when that's possible.
TECHNICAL SPECIFICATIONS
Frequency response |
Variation in frequency response in band from 20Hz to 20kHz ~10,0dB SPL |
SPL/sensitivity |
111dB / 1vrms@1Khz 30ohm |
Impedance |
32ohm, smart devices ready |
Ear cups dimensions |
Outer diameter: 90 mm |
Ear cups material |
American walnut |
Headband material |
Stainless steel and nautical artificial leather |
Earpads size |
Outer diameter: 90 mm Inner diameter: 55mm Depth: 20mm |
Earpads material |
Acoustic foam, extra elasticity poly leather and velour |
Cable termination |
Detachable 2 meters long Y 2.5mm mini jack |
Connector |
3.5mm jack with an adapter to 6.3mm jack |
Weight |
382g |
Magnet type |
Neodymium |
Transducer type |
Dynamic |
Coil |
2 layered |
Membrane material |
PET 25u |
Matched speakers |
Handpicked pairs |
Warranty |
5-year limited warranty |
Trial period |
30 days from delivery date |
More technical data:
APPROVED BY RECORDING ARTISTS
When they're recording vocals or instruments it's important they hear their tone as it is. All the details must be preserved and nothing should be exaggerated. A well tuned recording headphones are an essential tool.

“Absolutely LOVE the S4R 2021’s! A major leap forward from the first generation S4 models. More precise, well balanced, and extremely comfortable to work with for long hours. These are a game changer around the studio for sure.”
- MARKUS MANN
“With these headphones, we had no leakage at all. That was brilliant. And surprisingly they're also suitable for mixing actually, which I thought is actually impossible with closed-back phones."
- BERNHARD SCHMOLMÜLLER

“My recordings sound better and more alive. Because of the closed construction I can use a larger dynamic range and the smallest details and nuances are perfectly audible. The S4R has become indispensable in my studio.”
- DRIES GEUSENS
30 days trial
TRY BEFORE YOU DECIDE
You have 30 days to try it, use it, and love it — if you don’t fall in love by that time, reach out to our team to initiate an easy return and refund process.
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FREQUENTLY ASKED QUESTIONS
Since the S4R 1.1 have a similar frequency response to the S4X reference model, it will do an excellent job for preliminary mixing and producing. The closed cabinet has its flaws regarding the sound stage, though, so our recommendation for mixing and mastering lies with the S4X model.
We will open the option to upgrade your previous models to S4R once the preorders are over. You will be able to upgrade from the S4 or the S4R 1.0, or even crossgrade from the S4X model.
We ship worldwide. If it's not on the list, you got to reach out to us, so we can check the exact shipping costs, and you can make sure with your local authorities to see if any tax or import duties apply, so you have the final cost of getting the item to your destination.
We know it's challenging to make a decision based on tech specs and reviews. The only proper way to know if any of our products are appropriate for you is to give them a try. If you don't like what you hear, we offer a 30-day return policy with no extra costs.
30 days money back is available for all purchases.
If you decide you want to return your headphones and you bought them directly from us, contact us at info@olloaudio.com or via HelpDesk before the end of the 30-days period after delivery, and let us know the serial number of the headphones and a brief reason for return. We'll send you an RMA (Return Material Authorisation) number along with shipping instructions via email. Once the headphones are returned and checked in, we'll issue a refund for your purchase price using the same payment method you used for the purchase. Keep in mind that we don't refund shipping costs or import duties/taxes.
The trial period of 30 days starts from the day you receive the headphones.
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