Twin Pulse Isobaric System.

Twin Pulse Isobaric System.

EVERY NOTE IN A RECORDING ORIGINATES FROM THE MOVEMENT OF AIR. FOR THAT MOVEMENT TO BE REPRODUCED OPTIMALLY, IT MUST BE FAST, PRECISE, AND CONTROLLED. FROM THIS NEED COMES THE TWIN PULSE ISOBARIC SYSTEM®, THE PATENT THAT CHANGED SPIRIT HEADPHONES AND THE VERY WAY HIGH-FIDELITY AUDIO EQUIPMENT IS DESIGNED.

by Nicoletta Gay and Davide Scagliarini

 

The isobaric principle

In an isobaric system, the pressure between the two drivers remains constant. This configuration reduces turbulence and aerodynamic resistance that would otherwise hinder diaphragm movement, allowing the sound wave to be reproduced closer to its ideal form. The result is extremely low distortion, faster transient response, and stable dynamics even at higher listening levels.

Fluid dynamics applied to sound

Twin Pulse® is based on applying principles of fluid dynamics to headphone acoustics. The air trapped between the two drivers behaves like an elastic mass that responds to transients: it compresses and expands, helping stabilize diaphragm movement. This behaviour reduces mechanical irregularities and enables a more coherent reproduction, with an impact that can be perceived by the body as well as by the ear.

Precision, dynamics, realism

Twin Pulse® improves timbral accuracy by keeping the driver’s movement closer to ideal behaviour. It enhances spatial precision, making it easier to locate each instrument within the soundstage. It increases dynamic impact while maintaining control, even at high volumes. In other words, it does not interfere with the musical content: it reduces the mechanical factors that could alter it. No digital filters, no artificial correction — just mechanical engineering, material selection, and the application of a physical principle.

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The Twin Pulse® system is at the core of the Valkyria and Pulsar headphones. Here, isobaric technology works in synergy with the open-back structure to deliver a three-dimensional, dynamic listening experience — more real than real.

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ABOUT AUTHORS

Nicoletta Gay
Social media manager and lecturer at Politecnico di Torino, she studies digital languages and how they evolve. She shapes Spirit’s communication with a coherent, precise and contemporary voice.


Annalisa Magone
Head of Operations at Spirit, she oversees the processes that make each of our headphones possible. A journalist with a strong focus on technology and innovation, she brings rigor and clarity to everyday decisions.




Andrea Ricci
Head of Research and Development and designer of Spirit headphones. He explores the limits of sound reproduction to bring listening closer to an experience that seems more real than reality itself.

Stefano Sburlati
Filmmaker and digital artist, founder of Motion Pixel Studio. He translates Spirit’s identity into images and films that reveal the materiality, gesture and energy of sound.


Davide Scagliarini
Junior product designer at Spirit Torino, he joined us with his thesis project. He sings for passion and draws for a living—two practices that shape a design approach that is light, curious and rigorous.