IER-Z1R 

In pursuit of perfect sound

To deliver music with true emotional impact that takes your breath away; every element of the IER-Z1R headphones has been designed and developed for this one purpose. By paying attention to the smallest details, you can distinguish every nuance and subtle characteristics, in astonishingly faithful sound reproduction.

Signature Series

One Signature Sound

Elevating the high-resolution sound experience from one you listen to, to one you can feel.

Discover the IER-Z1R

Learn about the technology and inspiration behind our most premium In-ear headphones, the IER-Z1R.

Originally designed to make you feel 

We designed the drivers in the IER-Z1R headphones from the ground up, to work in total harmony together. The consistent sound signature carried out across each driver works as if they were a perfect single driver.

  • 5mm Driver
  • 12mm Driver
  • Balanced Armature Driver
  • Network

Naturally controlled acoustics

The vast experience and sense of our engineers is the key to acoustic design, which delivers the most natural sound. The finely-tuned IER-Z1R acoustic structure steers audio from the trio of driver units as though they were a single, ideal driver.

Sound path

A perfectly straight sound path

The super tweeter is on a coaxial position against the nozzle. This layout directly delivers accurate super high notes to your ears, with an ultra-wide frequency response up to 100kHz.

Refined-phase structure for accurate acoustic blending

Time coherence of the sound from the three drivers is just as important as their wide frequency response. The Refined-phase structure ensures sound waves are aligned, through precision adjustment of the width and length of each sound path. The magnesium-alloy construction also further eliminates vibration and unwanted resonance, to deliver perfect clarity and liveliness across musical genres.

Driver unit and inner shell
Acoustic tube

Sound Space Control for wide sound space

For balanced sound, from low to high frequencies, an acoustic tube connects to the cavity behind the driver unit. This technology presents a wide sound space with rich and natural notes.

Quality cable for preserving signal purity

Engineers didn't overlook the quality of the supplied cable, which releases the full potential of the IER-Z1R. From sound quality to wearing comfort and less touch-noise, the cable helps you immerse yourself in music on the go.

Balanced cable diagram

Balanced connection

A 4.4mm standard balanced connection cable separates left and right sound signals completely, which minimises cross-talk that results in sound deterioration.

Silk insulator and non-magnetic paring

Silk insulator and non-magnetic plating

Silk braid in the supplied cable reduces touch noise and works as an insulator against vibration. Using twisted pair wiring and a non-magnetic undercoat for gold plating on the plugs ensures legato and clean signal transmission.

Silver-coated oxygen-free copper cable

 Silver-coated oxygen-free copper cable

The IER-Z1R uses silver-coated oxygen-free copper wire, designed to minimise resistance and signal-transmission loss. The result is less sound degradation, finer detail and smoother treble sounds. 

Expertly crafted in Japan

Sony products made in Japan are synonymous with absolute quality and performance, and the IER-Z1R headphones are no exception. They are lovingly crafted with only the finest components and manufacturing techniques, resulting in exceptional sound quality.

Discover the Signature Series

Settle for nothing less than immersive excellence with the full range of Signature Series products. Designed for ultimate sound quality, they transcend audio conventions to elevate every note.

Specifications & Features
Hear astonishingly faithful sound reproduction with the IER-Z1R In-ear headphones. A custom high-resolution HD hybrid driver system and Refined-phase structure, along with the sonic purity of a 4.4mm balanced audio connection, elevates your listening experience to the one you can feel.
  • Optimised for High-Resolution Audio reproduction

  • HD hybrid driver system (2 dynamic/1 Balanced Armature)

  • Refined-phase structure for extensive sound

  • 4.4mm balanced, and conventional 3.5mm, connection cables supplied

  • Crafted in Japan

Driver Unit
Hybrid
Frequency Response
3Hz-100,000Hz
Cord Length
Approx. 1.2 m (48 in) , silver-coated OFC strands

What's in the Box

Clip, Carrying Case, Cleaning Cloth, Cable holder, Headphone cable (approx. 1.2 m (47 1 / 4 in) ) / Balanced-connection headphone cable (approx. 1.2 m (47 1 / 4 in) ), Hybrid earbuds (SS / S / MS / M / ML / L / LL) Triple Comfort Earbuds (SS / S / MS / M / ML / L)

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