Entreq Eartha Copper Ground Cable The Eartha Copper is Entreq's entry-level ground cable — the successor to the Challenger ground cable first released in 2010. It is designed to perform well in mainstream and mid-fi systems, offering a straightforward introduction to Entreq's approach to signal grounding without requiring a significant outlay. How It Works All Eartha ground cables are terminated at one end with a hook connector that connects directly to your Entreq ground box. The other end is specified and hardwired at the time of ordering, which Entreq state gives the best possible performance. If you prefer flexibility, you can specify a 3.5mm male connector (Level 1 or 2) in place of the hardwired termination, allowing use with Entreq's range of Click Adaptors. Additional lengths are available in 550mm increments beyond the standard 1,650mm. Materials The Eartha Copper is built from wood, copper, and cotton — materials chosen as part of Entreq's broader approach to grounding and signal drainage. Compatible Ground Boxes The Eartha Copper works best with the following Entreq ground boxes: Silver Minimus Tungsten, Tellus 3 Tungsten Performance, and Tungsten Performance models. Technical Specifications Specification Detail Length 1,650mm Materials Wood, Copper, Cotton Termination (ground box end) Hook connector Termination (component end) Hardwired as standard; 3.5mm male available Additional lengths Available in 550mm increments Who Is It For? The Eartha Copper is the sensible starting point if you are new to Entreq's grounding system and want to understand what it does before committing further. It suits mainstream systems where the Silver Minimus Tungsten or Tellus 3 Tungsten is already in place, or is being considered alongside it. If your system sits at a higher level, Entreq's Eartha Silver or Eartha Apollo cables would be the more appropriate choice. Buying from Martins Hi-Fi Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. We carry a range of Entreq ground boxes and cables at our Norwich showroom, and can demonstrate the effect of grounding in a real system context — which is the only way to properly understand what these products do. When you get in touch, you'll be speaking with Dave, Chris and Tim — experienced specialists who can advise on this product and your whole system. Contact us at [email protected], call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.
