Ollo Audio HPS S4X Headphone (New)


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The new Ollo Audio HPS S4X Reference goes a step further.

This new Ollo Audio HPS S4X headset is based on the existing HPS S4 but with upgrades that were put forward by the OLLO community.
So not just an upgrade but with the points that matter…

Frequency response

An even flatter frequency response than the HPS S4 and HPS S4R.


New earpads


The pads are custom designed and the opening is slightly enlarged.
This means they fit better around the ears and have enough padding to comfortably rest against your ears, so even more comfort than before.
The earpads are 90mm and consist of velvet, artificial leather and memory foam.

High precision woven mesh


Designed and manufactured to improve acoustics and protect sensitive components.

  • Smooth monofilament fiber
  • Efficient protection from dust
  • Strict airflow control

Matched speakers

SpeakersAll speakers in each series are selected and matched to achieve the smallest possible tolerance between the left and right channels.
They are made of Neodymium with a 2 layer spiral and a 25h PET membrane

New headband design

The headband has been redesigned to eliminate resonance when touched.
Durability and strenght of stainless steel joined with luxury and elegance of the nautical leather for maximum comfort

“Pure out of the box”

The new Ollo Audio S4X HPS is built entirely by hand and is composed of high quality environmentally friendly materials.
As with the HPS S4 and S4R, it works without correction software (DSP), complicated electronics and DA conversions.
Due to the even flatter frequency response, it sounds pleasantly pure, which is extremely pleasant if you want to experience music as intended.
Lively, wide, transparent and natural.

The audio quality is achieved with the aid of acoustic compounds, such as also commonly used in the better speakers.
This allows you to enjoy all the nuances in music.

Premium build quality:

The HPS S4X headphones are built with luxurious but environmentally friendly materials (made in Europe) and thanks to the renewed headband, it radiates even more class and durability.
Because the opening of the earpads has been slightly enlarged and is made of acoustic foam and extra elastic artificial leather, the wearing comfort has become even better.
Listening to long music sessions is extremely pleasant, without tiring or irritating.


Much interest from world-class sound engineers:

Many well-known sound engineers who already use the HPS S4 and/or HPS S4R are very interested in this new HPS S4X and are eagerly looking forward to using it.

Chris Brown: Muse, Radiohead, Bon Jovi, Spice Girls, Ronan Keating, INXS,…
Adam Mosely: U2, Rush, Beck, Genesis, Nikka Costa, Roxette, East 17, The Cure,…
Gary Noble: Amy Winehouse, Jessie J, James Arthur, Joss Stone,…

Technical specifications:

Speaker size: 50mm open back design
Frequency range: 20-22kHz flat response design
SPL: 108dB hearing threshold @1kHz
Impedance: 32ohm
Ear cups outer diameter: 90mm
Ear cups inner diameter: 70mm
Ear cups material: American walnut
Headband material: Stainless steel and nautics leather
Ear pads size: 90mm
Ear pads 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 adapter to 6.3mm jack
Servicable: Every part of HPS S4X is replacable with home too
Weight: 350g
Magnet type: Neodymium
Transducer type: Dynamic
Coil: 2 layered
Membrane material: PET 25u
Matched speakers: Handpicked pairs
Warranty: 5 years limited warranty


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