
Mavros Ultra L RCA Grun
Wide-bandwidth OCC copper interconnect.

The latest generation of our highly-regarded Mavros RCA interconnect cable, based on the design objectives and manufacturing techniques originally developed for our Asimi range, but utilising very high-purity OCC copper rather than silver conductors.
The Mavros Ultra L RCA Grun has been designed from the ground up to complement the performance of ‘high-end’ audio systems by achieving maximum signal transfer with minimum susceptibility to spurious interference.
The Mavros Ultra L RCA uses the very highest quality ‘6N’ (99.99997% purity) copper manufactured using the OCC ‘Ohno Continuous Cast’ technique. The cable consists of a pair of conductors, each made up from six bundles of 12 multi-conductor wires, plus a thicker centre core. This in turn is covered by a continuous electrostatic screen with copper shielding braid, ensuring minimal susceptibility to EM and RF interference and noise, giving Mavros an exceptionally low noise-floor, particularly when utilising the supplied Grun adapter. (The optional Grun Mains Adapter offers a further performance gain.
The ultra low-mass, wide bandwidth, cold-weld Ultra L (Latik) RCA plug benefits from an innovative and extremely stable non-conductive 3D-printed geometric lattice structure. The cable also incorporates our precision dd (dual-drain) system and Atlas’ Grun Coherent Earthing System (Grun lead & spade adapter included).
Key Features. Essential characteristics of this product.




Product Specifications.
Construction | Symmetrical/Stranded |
Conductor | OCC Copper |
Dielectric | Microporous PTFE/PEF |
Screen | Foil/OFC braid; Dual Drain |
Capacitance | 35.22 pF/m |
Inductance | 0.472 µH/m |
Resistance | 0.0192 Ohms/m |
Outside Diameter | 10.8 mm |
Colour/Finish | Black Fabric/Luxe options |
What’s In The Box?

- Interconnect Cable Pair
- Grun Cable 1:2 1
- Grun Spade Adapter 1
- Cleaning Cloth 1
- Cotton Gloves Pair
- USB Stick 1
Reviews. What the specialist media say…

HiFi and Music Source has included us in their Best of ‘HFAMS 2024’ for our upgrade to an older set of Atlas Mavros interconnects.
Atlas Cables wins the next Best of 2024 award for its cable upgrade service. This innovative service offers the latest cable technology retrofitted to existing cables. This has two key benefits: it saves you the cost of accessing new cable technology and saves the environment by updating cables rather than just replacing them.

…but the copper-infused Mavros Ultra succeeds in sounding smoother still. It helps instil a settled quietness to musical backgrounds, the system sounding free of grit and grain and yet not so luxuriant or sweet that the shimmering edge of percussion or brass is polished away. This is a supremely well-balanced cable with a standard of construction and finish to match.

If you have a half-decent system, you’re going to want to try this upgrade, it will be worth it. There’s a quality here that hints at clarity in both manufacture and thinking from Atlas in higher-end cable production.
This review refers to a factory upgrade of an older Mavros cable to current production specification. Please refer to the ‘Your cable. Our Promise’ page for further information.