Ollo Audio S4X 1.2 Reference Headphones (Open Back)


Open back headphones ideal for mixing and audiophile listening, The solidly design OLLO Audio S4X Reference is hand-built in Slovenia with a neutral sound balance. Building on the successful S4 model and previous S4X variants, the S4X 1.2 from OLLO improves with a flatter frequency response, better soundstage, wearing comfort and a premium finish.





In stock

Open Back Headphone

Ollo Audio


Ollo Audio S4X 1.2 Reference Headphones

The S4X Reference from OLLO Audio is an open back studio headphone to help audio engineers deliver an "A" level performance even when they are not in a world-class studio.

OLLO headphones has a balanced frequency response achieved by using the power of acoustics design and audio engineering. Designed and measured using IEC 60318-1 standard.

Incorporating premium materials for comfort and durability. American walnut, aluminium, nautical leather, and stainless steel. All sustainably sourced.

Backed up by OLLO's limited 5-year warranty program, it is built to last and a testament to its commitment to quality. Every pair is measured with its own individual frequency response measurement included inside the box.



A Little About OLLO Audio



Technical Stuff 

Type: Open back design
Driver: 50mm matched dynamic drivers
SPL: 108dB / 1vrms @ 1kHz 30 Ohm
Frequency range: 20 - 20KHz flat response design
Impedance: 32 Ohm
Ear pads outer diameter: 90mm
Ear pads inner diameter: 55mm
Ear pads depth: 25mm
Ear cups materials: American walnut
Headband material: Stainless steel and nautical 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
Weight: 350g
Warranty: 5 years limited warranty



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Returns Policy handles returns and processes refunds in accordance with the Australian Consumer Protection legislation.

Should you wish to return your order, please notify us within 14 days of purchase with a valid reason for return. If we are unable to resolve your complaint or further assist you, we will process a refund upon timely receipt of the goods purchased. Unopened goods will be refunded in full. Refunds will be processed promptly and payment made by the same method that you made payment. All refunds are made at the discretion of


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