Atlas Zeno Grun Harmonic 1:2 Replacement Custom Headphone Cables

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Zeno replacement earphone cables by Atlas Cable are designed to offer a significant upgrade over the standard cables bundled with even very expensive premium in-ear monitors or IEM earphones.

This Zeno Grun Harmomic 1:2 variant is for headphones with cables connecting to BOTH earpieces. Choose the Zeno 1:1 variant if your cable plugs into just ONE earpiece.

The Zeno Harmonic cable combines high-purity OCC copper conductors in a true dual-balanced design, with the unique Grun Coherent Earthing System. This provides a reference earth point when attached to either your amplifier or mains ground.

This results in a reduction of EMI-induced background noise levels, often to an unprecedented level in a headphone system, revealing the true dynamic range of your headphones.

Zeno Harmonic also features a low-mass, wide bandwidth 4 (OCC) pin XLR connector with the proven cold-weld (precision-crimped) solder-free construction methods. This produces a continuous high-integrity signal path, avoiding the breaks in material continuity which degrade ultimate fidelity.

Zeno is supplied as standard with a 1m Grun cable and spade tag adapter for connection to the ground post on your amplifier. A still higher level of performance can be obtained via an optional Grun mains adapter, typically used in a spare socket on your mains distribution block. A high quality XLR–6.3mm jack-plug adaptor is also included with each Zeno Harmonic cable.

Available Lengths

Zeno Grun Harmonic replacement headphone cables are available in the following standard lengths:

  • 2.00 metres
  • 2.50 metres
  • 3.00 metres
  • Custom lengths available - please call us!

Luxe Finish Options

Atlas Cables offer a range of special Luxe finish options for this premium replacement headphone cable. Four standard leather colours plus optional finishes available in contrasting or self-colour stitching options. Bespoke colour matching options (RAL or Pantone) are also available.

Please contact Audio Sanctuary to discuss your requirements if you would like to pursue the Luxe options.


  • 4-Pin OCC XLR Connectors - Low-mass OCC XLR with cold-weld terminations, reducing the number of materials and break points in the signal path, resulting in more consistent construction and improved audio performance
  • OCC Copper Conductor - OCC (Ohno Continuous Casting) process was developed by Professor Ohno, from the Chiba Institute of Technology, to manufacture a very high purity single grain copper or silver. There are only a handful of companies in the world manufacturing via this method.
  • FEP Dielectric - FEP (Fluorinated Ethylene Propylene) has a big advantage over PTFE in that it can be applied to sophisticated conductors at lower temperatures, preserving the integrity of the base material.
  • Construction - Dual-Symmetrical Balanced.
  • Grun Coherent Earthing System - An independent system earth which eliminates low-level RFI, EMI and noise on the signal ground. Read more...


  • Construction: Dual Symmetrical
  • Material: OCC Copper
  • Dielectric: PEF
  • Screen: Braid + Mylar™
  • Conductor Resistance: 0.0859 Ohms/m
  • Capacitance: 95.08 pF/m
  • Inductance: 0.43 µH/m
  • Outside Diameter: 7.6mm

More Information

Delivery and Returns

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Please be advised that we may upgrade your delivery to a better service if we deem it appropriate to designated destinations at no additional cost. Please view our returns policy.
*Quoted delivery times are estimates and apply to normal working days for in stock items.


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Cable Information

Cable Type:
  • Headphone Cables
OCC Copper



  • UK from: £1.50
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  • International from: £3.95
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