[U2, Foo Fighters, Nick Cave, Lou Reed, Sting, Keith Richards]

“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.”

[Nelly Furtado, Kylie, Black Honey, Gabrielle Aplin, Sub Focus, One Direction, Amy Macdonald]

"The Ollo S4 headphones have changed the way I can work. I'm often in different studios or travelling and the S4's allow me to get songs together with confidence and not have that horrible shock when you go back to studio monitors and your work sounds nothing like it does on headphones. They are even and balanced and most importantly I trust them."

[French Guitarist, Composer, Producer And Mixing Engineer | Mick Jagger, Nicki Minaj, Will.i.am.]

"The separation between the instruments, the dynamics and stereo image are perfect to be comfortable mixing with them. I was amazed by the S4. But I am floored by the new S4X reference headphones. Just amazing!"

[David Bowie, Nick Cave And The Bad Seeds, Depeche Mode, Moby, Paul Simon, Goldfrapp]

"My S4X headphones are the only headphones I use for referencing my mixes. Ollo headphones allow me to work when otherwise I can’t. The bottom end is tight and warm and the width works extremely well. If you want to mix on headphones you want to mix on Ollo Headphones"

[Lana Del Rey, Tiziano Ferro, Emma Marrone, Pfm, ...]

".... I never used headphones to make my mixes, except to check for any noise that was causing me problems, but I never trusted the sound I heard for the mix, now that I bought Ollo Audio headphones on my way of working has changed. Thanks Ollo Audio."

[London Grammar, Bryan Adams, Jeff Lynne]

"I really love my S4’s. I know that when I am in a new room and I have any doubts I can put them on and trust what I am listening to! They are super comfortable to wear for long periods and cause hardly any fatigue. They were a great find and I highly recommend them."

[Top 100 Dj By Dj Mag And Multiple Idma Award Winner]

"I loved how OLLO headphones immediately show any unbalance in a mix. They translate any mix very well"

[Stevie Wonder, Usher, Tyrese, Jeezy, Ann Nesby, Carl Thomas, Chuck Harmony, ...]

"The OLLO products are very accurate and are a must have compliment to your life as a music professional."

[Music Producer, Guitarist | Miel San Marcos]

"I'm completely blown away with the quality of my OLLO headphones. I've used so many different types of headphones and these by far are the best."

[Jeff Beck, Simply Red, Natalie Imbruglia, Atomic Kitten, Gianna Nannini]

"The technology to mix anytime anywhere is now availabe. All you need is a good DAW and true flat response headphones to do a great mix. OLLO's HPS S4 deliver every time. They really are an excellent product!"

[Usher, Miley Cyrus, Gwen Stefani, Backstreet Boys, Kelly Clarkson]

"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."

[Amy Winehouse, Joss Stone, Jessie J, James Arthur, Sean Paul, Estelle, 3x Grammy Winning]

"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."

[Lady Gaga, Adele, Florence And The Machine, Christina Aguilera, Paolo Nutini, Lily Allen]

"These headphones are such a pleasure to work on - natural, comfortable and true."

[Co-founder Of The Band Subsonica, Musician, Composer, Author, Producer. Label Manager For Cramps Records.]

"Ollo headphones are an amazing and accurate tool for my days. Precise, beautiful, relaxing on ears."

[Radiohead, Muse, The Beatles Anthology Project With Sir George Martin... 40+ Top Uk Charts]

"With their elegant design and clear, neutral sound, HPS S4 Studio headphones are a welcome addition to my monitoring options."

[John Grant, The Divine Comedy, Villagers, Lisa Hannigan]

"It's rare you get a single piece of equipment that changes the way you work but the Play2Me has changed how I approach my mixing. The accuracy of the low end with the system was surprising to me, even compared to well designed control rooms. It gives so much insight into the interaction of the bass channels and the kick and it was a pivotal tool in helping me mix the upcoming Divine Comedy record. As well as being a tool, it makes listening to music for leisure a lot more fun, more visceral. The headphones are detailed and precise and give a good sense of the air in recordings. I do a lot of touring and the Play2Me system has now become an integral part of working on tracks when I'm away from the studio. I love the design and the build and they're very comfortable to wear."

[Mixer, Engineer, Record Producer | U2, The Rolling Stones, Jack Savoretti, George The Poet]

"S4’s are insanely detailed and so comfortable to wear that they already helped me to get the job done on a pretty vast variety of genres and music styles. I can trust them as my main monitors, and wear them for hours without fatiguing my ears, thanks to their super-accurate frequency response, at very quiet levels. Having such a powerful tool helps me - everywhere I work - to feel really good from the very beginning of a mix, forgetting about all the annoying room reflections and background noises that we can all experience with speakers. S4’s keep me focus on what matters the most, the music I am working on every day."

[U2, Beck, Rush, Kiss, Nikka Costa, Roxette, The Cure, John Cale, Spike Jonze, Ucla And Berklee.]

"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!"

[Little Mix, Kelly Clarkson, X-factor]

"OLLO's S4X headphones have revolutionised the way I approach my mixes. As someone who spends 90% of their time mixing on headphones, these offer an incredibly accurate, flat response and they are the coolest looking headphones I've ever had! Not to mention that they are still a comfortable fit after a long session in the studio. I'd be lost without them!"

[Producer, Mixing And Mastering Engineer, Milk & Sugar Dj Team]

"Though my control room has an acoustic treatment from one of the best acoustic designers around, the OLLO headphones have helped me to push my mixes onto a new level."

[Liquido, Pyogenesis, Deine Jugend, Laura Carbone, My Early Mustang, Godskill, Die Atzen, Etc.]

"Love the neutral S4X REFERENCE HEADPHONES. Exactly the brutally honest sound that I need when mixing on headphones."

[3 Grammy Awards. Lauryn Hill, Down, Michael Jackson, The Fugees, Santana , Anders Osborne]

Warren Riker in an engineer and mixer at Booga Basement Studio and Chung King Studios. Three-time Grammy winner has been honing his skills in the studio since he was 15 years old, and has a producer, engineer or mixer credit on over 40 million records sold.

[Janet Jackson, Michael Jackson, Lionel Richie, Mariah Carey, Madjefmusic, Jam&lewis, Kika, Rhian Benson, Sounds Of Blackness, Kush Etc.]

"Best headphones for accuracy and clarity."

[American Multi-platinum Music Producer, Songwriter, Remixer]

Rhano Burrell is an American multi-platinum music producer, songwriter, and remixer. In the late '80s, Rhano along with his identical twin brother Rheji Burrell were signed as BURRELL to the newly formed VIRGIN RECORDS in America.

[Lang Lang, 2Cellos, Anna Kendrick, Pitch Perfect, John Wick, Despicable Me 2, Alvin and the Chipmunks..]

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.

[Mary J. Blige, Busta Rhymes, Beyoncé - 2013/15 Superbowl, Missy Elliott and many more]

“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!!”