The ULTRASONE Signature QUANTUM is created for listeners who refuse to compromise. For audiophile music lovers who want warmth, transparency, precision, and emotion in perfect balance. A headphone for those who want to hear every detail — without ever sacrificing musical naturalness. 

At its heart is the newly tuned 40 mm GTC driver. This legendary driver, known from the Edition 15 and the Founders Series, is now used in the Signature Series for the very first time. The result is an exceptionally mature, transparent, and highly precise sound with pleasant warmth and a carefully refined bass emphasis. Every genre benefits from this balance: classical, jazz, singer-songwriter, electronic music, rock, pop, and complex audiophile recordings.

The special driver coating defines its unmistakable character. The gold coating contributes to confident, pleasant bass and expressive mids, while the titanium coating on the cone delivers ultra-clear highs with outstanding clarity and transparency. The result is a sound signature that is emotional, controlled, and analytically precise at the same time. 

With S-LOGIC5, you experience fully symmetrical, precise listening with exceptional spatial reproduction. Depth layering, positioning, air, and detail reach a level that makes music not only audible, but truly tangible. Signature QUANTUM frees the sound from inside your head and opens a stage where every recording can reveal its own atmosphere.

For maximum signal purity, the internal wiring has been newly developed and produced with premium materials by LUMINOX. In addition, two high-end LUMINOX cables, developed exclusively for Signature QUANTUM, are included — one of them balanced. Together with Balanced Audio as standard, they create a reference-level signal path for outstanding precision, stability, and listening pleasure. 

The Signature QUANTUM also expresses its ambition visually and physically. Ultraclear glass plates with premium engraving, detachable screw-lock cables with stainless steel connections, and a robust, elegant aluminum case underline its exclusive character. The foldable and rotatable headband with FGC technology ensures exceptional comfort, even during long listening sessions.