Atlas Arran USB A-B Grun delivers precision signal transfer
Atlas Arran USB A-B Grun is a reference-grade digital interconnect engineered to redefine USB audio performance. Designed and hand-assembled in Scotland, this high-end USB A-B cable uses solid core OCC (Ohno Continuous Cast) copper conductors and incorporates Atlas’s proprietary Grun Coherent Ground System, ensuring unmatched fidelity, timing accuracy, and low-noise transmission for high-resolution playback systems.
Atlas Arran USB A-B Grun uses high-purity solid core OCC copper
Atlas Arran USB A-B Grun is crafted with twin solid core OCC copper conductors — a material chosen for its ultra-high purity and exceptional conductivity. The continuous cast process reduces grain boundaries and impurities, allowing a smoother electron flow and minimising signal distortion. This conductor architecture preserves timing integrity in digital audio transmissions, reducing the jitter and phase anomalies that can compromise tonal accuracy and microdynamics in USB-based systems.
Atlas Arran USB A-B Grun eliminates digital noise through meticulous shielding
Atlas Arran USB A-B Grun incorporates a high-efficiency shielding system that includes a full-coverage foil and OFC braid layer. This dual-layer design effectively rejects electromagnetic interference (EMI) and radio frequency interference (RFI), preventing signal contamination that often manifests as glare, loss of focus, or graininess in audio reproduction. By isolating sensitive data and power lines within a tightly screened path, the cable maintains signal purity even in electrically noisy environments.
Atlas Arran USB A-B Grun integrates the Grun Coherent Ground System
Atlas Arran USB A-B Grun features the advanced Grun Coherent Ground System — a distinctive Atlas innovation that decouples system ground paths from the USB signal. Traditional USB cables often introduce noise through shared grounding between components; Grun solves this by providing a separate low-impedance ground route. The included Grun lead and spade tag adapter connect to a clean ground point, enabling superior noise rejection. Further gains are achieved when paired with the optional Grun mains adapter, with improvements compounding when used across multiple Grun-enabled products.
Atlas Arran USB A-B Grun ensures consistent performance with cold-welded connectors
Atlas Arran USB A-B Grun terminates with gold-plated USB A and B connectors using cold-weld technology, ensuring a gas-tight, mechanically stable connection free from solder-induced impedance irregularities. This technique not only avoids heat damage during construction but also reduces the long-term risk of contact degradation. These connectors are specifically engineered to maintain a consistent impedance and secure fit across a wide range of digital sources and DACs, preserving signal continuity even under frequent reconnection.
Atlas Arran USB A-B Grun is built with Atlas's Five Essential Elements
Atlas Arran USB A-B Grun reflects Atlas's core engineering philosophy by meticulously balancing the Five Essential Elements: conductor, dielectric, connector, screening, and manufacturing precision. The low-loss PEF dielectric maintains consistent electrical properties across the cable's entire length, while the solid core construction stabilises signal geometry. Each component is selected and assembled with the goal of reducing jitter, timing distortion and parasitic losses that can compromise digital audio realism.
Atlas Arran USB A-B Grun rivals S/PDIF and streaming in clarity and resolution
Atlas Arran USB A-B Grun delivers a listening experience that competes directly with the best coaxial and Ethernet-based streaming cables. By addressing the shortcomings inherent in typical USB cables — such as inadequate shielding, poorly matched impedance, and ground loop noise — Arran SC USB offers greater clarity, expanded dynamic range, and a more natural, effortless sound. This makes it the digital interconnect of choice for revealing high-end systems where USB is the preferred interface.
Atlas Arran USB A-B Grun arrives in premium packaging with bespoke accessories
Atlas Arran USB A-B Grun is supplied in a luxury blue presentation box, underlining its high-end status. The package includes the interconnect cable, a dedicated Grun 1:1 ground cable, Grun spade adapter, USB stick, a pair of cotton gloves, and a cleaning cloth — everything required for safe installation and optimal system integration. The 8.6 mm outer diameter cable is finished in a premium blue fabric braid, with bespoke colour and finish options available for system-matching or aesthetic preferences.
Atlas Arran USB A-B Grun delivers high-end USB audio with engineering-led design
Atlas Arran USB A-B Grun is a no-compromise digital audio cable that combines scientific rigour with artisanal build quality. With a capacitance of 40.05 pF/m, inductance of 0.798 µH/m and resistance of just 0.971 ohms/m, the cable is precisely engineered for stable, high-speed USB 2.0 transmission. Every aspect — from conductor geometry to shielding topology — contributes to a performance level that elevates USB from a convenience protocol to a viable high-resolution interface in reference playback systems.
