GEEKRIA Apollo Silver-Plated Upgrade Audio Cable for Sennheiser HD 620S/599/598/560S/400PRO/579/569/550/505 | 4.4mm to 2.5mm

Discover the GEEKRIA Apollo Silver-Plated Upgrade Cable

Upgrade your listening experience with the GEEKRIA Apollo cable, designed to pair seamlessly with a wide range of Sennheiser headphones. This high-purity upgrade cord blends 4 strands of 5N OCC copper with silver-plated copper, delivering a vibration-free, low-loss signal path for enhanced clarity and detail across your favorite tracks.

What makes Apollo stand out:

• Premium materials: Cryogenic-annealed single-crystal copper and silver-plated copper create a robust, low-resistance conductor with reduced microphonic noise.
• Thoughtful construction: The 0.08mm x 7 strands x 2 strands OCC and the dual-layer Litz insulation minimize capacitance and skin-effect losses, helping you hear more nuance in high-resolution recordings.
• Durable yet flexible: A transparent SoftFlex PVC jacket protects the inner conductors while remaining pliable for easy handling and long-term use.
• Perfect compatibility: Made to work with Sennheiser HD 400 PRO through HD 620S, including several HD 5xx/59x models and more, via a 4.4mm to 2.5mm plug configuration.
• Real-world fit: A 120 cm (4 ft) length offers ample room for desktop rigs, stand setups, or on-the-go listening without undue tension.

In daily use, you may notice a more defined presentation of instruments and vocal textures, especially with hi-fi or audiophile-grade gear. While results can vary by source and headphone model, many listeners describe clearer imaging, tighter bass articulation, and more consistent high-frequency response when upgrading to a high-purity copper and silver-plated cable like Apollo.

Key benefits in everyday listening

• Clearer detail: The hybrid conductor design aims to preserve subtle harmonics in complex mixes.
• Less interference: Strong anti-interference properties help maintain signal integrity across environments.
• Conventional to premium upgrade: Easily replace a stock cable to elevate your current headphone setup without changing amps or sources.

What comes in the package is simple: one replacement cable crafted to fit a broad set of Sennheiser models, with a 4.4mm to 2.5mm connector for versatile compatibility. If you’re building a desktop listening station or refining a portable audiophile rig, this cable offers a practical upgrade path without requiring additional adapters.

Note: This listing is for the headphone cord only; headphones or other accessories are not included. Verified compatibility includes popular Sennheiser lines, making Apollo a convenient choice for users seeking a direct upgrade path.