Ollo Audio S4R

Hear your performance as it is, no sugar coating

Your recording headphones are the first touch with your performance. All the details must be preserved and nothing should be exaggerated. A well tuned recording headphones will have no mercy on you and push you to your absolute best. Meet the new S4R recording headphones made for the most demanding audio creators.

sound seal acoustics ™

With 100% separation of front and back earcup cavity, these headphones deliver uncompromised frequency and transient response with minimal sound leakage. No more click bleed in to your recordings.
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stainless steel, nautical leather, velour, aluminum & wood

Studio environment can be very demanding to headphones' wear and tear. Cable tripping, accidental drops and plugging them into wrong outputs demands extreme built quality. Our 5 year limited warranty program is a testament of dedication to high quality.
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Wear them for hours straight, no discomfort

Self-adjusting strap with weight distribution enables long sessions without headaches caused by single pressure points. The earpads are soft velour-pleather hybrid and disperse heat well. Sweaty ears are a thing of the past.

TECHNICAL DESCRIPTION

SPEAKER

Hand picked and left / right matched transducers delivering accuracy and instrument separation. (+/-1dB SPL tolerance, pink noise, range 100Hz-10kHz in free field) 

50 mm, PET 25u membrane, 2 layered coil, 32 ohms,
Dynamic Neodymium speaker with 109dBSPL (S4X) / 111dBSPL (S4R) 1Vrms@1KHz 30ohm output that makes them work with smart devices too.
Replaceable using home tools.

ACOUSTICS

Replaceable earpads with outer diameter of 90 mm(3.5inch), inner diameter of 55mm(2.2inch) and depth of 20mm(0.8inch).
Hybrid artificial leather and velour earpads to control flow resistance around the earpads seal resulting in smoother response in low mids and mids (150Hz-1kHz) perceived as natural timbre on vocals, pianos, strings,...
1kHz @ 85dBSPL sweep THD < 0.084%S4X / 0.079%S4R , Variation in frequency response in band from 20Hz to 20kHz ~13,7 dB SPL S4X / 10,0dB SPL S4R, pink noise IEC 60318-1 compatible standard.
Fully separated front and back of the speaker for minimal phase cancellation and more direct sound signature. SoundSeal™ 

HEADBAND

Self-adjusting artificial leather strap
Clamping force set for most neutral frequency response on industry standard bitragional diameter of 14.3cm (KEMAR)
Stainless spring steel powder coated
360 earcups rotation
Strap and steel are replaceable using home tools

CABLE

Detachable braided silicone cable employing OFC core to ensure minimal signal distortion.
Color labeled L and R (Left is Black)
Reversible to have cable coming down behind your back when playing an instrument or in front when producing with a desktop interface.

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