S4X
S4X
TRUSTED BY OVER 10K PRO & HOME STUDIOS
what you hear is what you get
Similar to a calibrated monitor showing a designer true colors, these headphones deliver true sound - you can trust them with your mixing decisions.
COMPARISON REPORT
MEASUREMENTS
Explore how the S4X/R compare to other popular studio headphones in a full report including IEC 60318-1 & 4 standards
RIGHT TO REPAIR
We strongly believe that modern products should be designed with serviceability in mind. Any and all spare parts must be available and exchangeable with home tools.
Furthermore, we offer best in class 5 yr limited warranty.
FLAT OUT OF THE BOX...
FLAT OUT OF THE BOX...
...is the phrase reviewers coined.
Pros&Cons Video Reviews
BUILT TO LAST
Durability backed up with a 5yr limited warranty and full serviceability.
EAR FATIGUE
Roll-off on high frequencies as you're used to from great sounding rooms. Furthermore, full sensitivity data to set K-metering to ideal 85dBSPL.
FLEXIBLE
Standard audio jacks make them a plug and play on just about any audio gear.
TRUSTED BY INDUSTRY PROFESSIONALS
TRUSTED BY INDUSTRY PROFESSIONALS
WORKING WITH U2, RIHANNA, RADIOHEAD, SIA, LADY GAGA, USHER, STING, BEYONCE, AND MORE
“I love my S4X reference headphones: they sound fantastic, are reliable and trustworthy, sit comfortably on my head and around my ears, don't give me ear-fatigue and don't press my ear onto the glasses allowing for continued and comfortable use.”
MARC URSELLI | U2, Foo Figthers, Nick Cave, Sting, Lou Reed, Keith Richards,...![]()
"These headphones feel like you're listening to speakers. For an engineer, and a mixer, to have that same kind of feeling like they're sitting in front of their favourite pair of monitors, is priceless."
SEAN TALLMAN | Usher, Miley Cyrus, Gwen Stefani, Rihanna,...![]()
"These are my favorite headphones. They sound great and are very comfortable. I’m able to use them for long hours without listening fatigue or discomfort. They come in “closed back” for recording and “open back” for mixing duties."
GARY NOBLE | 3xGrammy winning, Amy Winehouse, Joss Stone, Jessie J, James Arthur, Sean Paul, Estelle,...![]()
"The HPS S4 respects all of the depth, width, air, tight bass, space and detail that I work so hard to create in a mix. I’ve compared them with the leading competitors and OLLO win! Excellent reference headphones for mixing and mastering. Switching between the headphones and my speakers is effortless. And they are really light in weight and comfortable for long periods of use .... and they look cool too! Job well done!"
ADAM MOSELEY | U2, Beck, Rush, Nikka Costa, Roxette, The Cure, John Cale, Spike Jonze, UCLA and Berklee,...![]()
"Best headphones for accuracy and clarity."
JEFF TAYLOR MADJEF | Janet Jackson, Michael Jackson, Lionel Richie, Mariah Carey, Jam&Lewis, Madjefmusic, Kush,...![]()
"These are the best sounding headphones I’ve ever heard… At least to my ears… Same sort of way that Alan Sides’ main monitoring systems at the Oceanway studios always just felt like an extension of my ears... as do these sexy sounding (and looking) ear pillows."
WARREN RIKER | 3x Grammy winning, Lauryn Hill, Down, Michael Jackson, The Fugees, Santana, Anders Osborne,...![]()
"I love the depth and clarity I get in my mixes with the S4x. Especially in the kick and snare which is often so hard to get a punch in headphones that will translate to a speaker. But more then anything, they really make it fun to listen to music for a long period of time!"
JOHN ESCOBAR - Independent Producer/engineer, Professor - Berklee College Of Music![]()
“After listening and mixing using the S4X headphones for 2 day’s, I finally realized that I could mix using these headphones alone!Using the S4X headphones pretty much has eliminated the need to do the "car check" for me. These headphones are flat and revealing as well as comfortable for long term use. I highly recommend them!!”
KEVIN KWIZ RYAN | Beyoncé - 2013/15 Superbowl, Mary J.Blinge, Busta Rhymes, Missy Elliot,...![]()
"The Ollo S4 X has completely revolutionized the way I listen to the sonic arrangement of a song. It’s like having a sonic microscope. The level of detail and depth they get is astonishing."
MATTEO MARCIANO | Lang Lang, 2Cellos, Anna Kendrick, Pitch Perfect, John Wick, Despicable me2, Alvin and the Chipmunks, NYU,...![]()
S4X OPEN BACK
Reference headphones designed for mixing and mastering.
Neutral and brutally honest.
€399.00 with 30 days trial period
S4R CLOSED BACK
Recording headphones with minimal sound leakage and neutral response.
Optimized for recording sessions.
€399.00 with 30 days trial period