Infinite Liberty takes centre stage in an in-depth review by Hong Kong publication AudioTechnique. In its March 2026 issue, the magazine explores the flagship model of the latest Crystal Cable Liberty Series, examining its conductor technology, eight-strand construction and performance across several high-end portable audio systems.

As the highest-performing model within the renewed Liberty Series, Infinite Liberty represents a significant development in Crystal Cable’s approach to portable audio. AudioTechnique describes the new generation as much more than a simple evolution of the earlier Duet Series. Instead, it reflects years of continued research into conductor technology, cable geometry, durability and signal transmission.

Infinite Liberty and Infinite Crystal Silver

A central focus of the review is the conductor technology behind Infinite Liberty. The cable uses an eight-strand construction based on Crystal Cable’s Infinite Crystal Silver (iCS), bringing technology developed for our highest-level cables into a design created specifically for portable listening.

AudioTechnique highlights the combination of the eight-strand braided geometry and the electrical properties of iCS as important elements of the design. The construction is intended to provide extremely low resistance, strong current transmission and effective protection against electromagnetic and radio-frequency interference.

The review also pays considerable attention to the physical construction of the cable. For a portable product, flexibility and durability are just as important as electrical performance. AudioTechnique notes Crystal Cable’s focus on materials selected to maintain stable mechanical properties while remaining comfortable during everyday use.

Particular attention is given to the prevention of microscopic imperfections within the conductor. The article discusses how Crystal Cable approaches the issue of micro-cracks that can occur in metal conductors over time, with the objective of maintaining consistent signal transmission throughout the life of the cable.

Listening across different high-end IEMs

For its listening tests, AudioTechnique paired Infinite Liberty with the Astell&Kern A&ultima SP4000 and several high-performance in-ear monitors, including the Noble Audio DANTE and Vision Ears GO live!.

This gave the reviewer the opportunity to evaluate whether Infinite Liberty imposed a recognisable tonal character of its own or instead allowed the individual characteristics of each earphone to remain intact.

With the Noble Audio DANTE, the reviewer compared Infinite Liberty directly with the original cable and reported a clear improvement. According to the article, the presentation became more open and dynamic while retaining the transparency associated with Crystal Cable. Greater resolution and a stronger sense of musical energy allowed the performance to develop with increased freedom and scale.

When paired with the Vision Ears GO live!, Infinite Liberty again preserved the fundamental character of the earphones while allowing their strengths to become more apparent. Rather than reshaping the sound through an obvious tonal signature, the cable was described as providing a clearer path for the information already present in the recording.

Transparency without imposing a character

One of the most important observations in the AudioTechnique review concerns the overall tonal character of Infinite Liberty. The magazine describes a presentation with high transparency, speed, resolution and dynamic capability while avoiding the sense that the cable itself is imposing an artificial sonic identity on the system.

The reviewer particularly praises the ability of Infinite Liberty to reproduce small changes in musical intensity and larger dynamic contrasts with equal conviction. Fine details remain clearly defined while the presentation retains a natural sense of flow and musical coherence.

Soundstage reproduction is another important strength identified during the review. AudioTechnique describes a wide and three-dimensional presentation with convincing depth and accurate spatial positioning. Individual performers and musical elements remain clearly separated within the recording while the overall presentation retains a strong sense of scale.

The magazine summarises this character with the idea of a “transparent window”, describing Infinite Liberty as a cable that allows listeners to move closer to the original musical information rather than introducing an obvious tonal effect of its own.

A new reference for the Liberty Series

The review concludes that Infinite Liberty represents much more than a conventional headphone cable upgrade. Its combination of conductor technology, refined construction and sonic transparency enables high-performance portable systems to reveal more of their existing potential.

For Crystal Cable, Infinite Liberty brings technologies developed through decades of research into a format designed for personal audio. Its eight-strand iCS construction combines performance with the flexibility required for everyday listening, continuing the philosophy behind the Liberty Series while taking its performance to a new level.

We sincerely thank AudioTechnique for this detailed review and for taking the time to explore Infinite Liberty across a variety of high-end portable audio systems.

Discover more about Crystal Cable portable audio:
Explore the Liberty Series