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Cuprum Series

Cuprum Series
Cuprum Series
*Splitter Type:
Solder Wire:
Braid Type:
*IEM Connector:
From: $199.99

If you have special instructions regarding your custom cable, e.g., heat shrink color, custom length, or any other requests, please list them in the remarks section on the order/payment page

Our custom IEM cables are based on our famous headphone cables in a smaller outer diameter (OD) for improved ergonomics and lower weight while using the same 26-AWG, 8-wire construction for keeping the same superb sound quality. 


OCC copper cables have been here since the OCC manufacturing process first came to life.

Since copper is relevantly inexpensive and less complicated to produce, There are plenty of excellent OCC copper cables on the market for reasonable prices. 

Instead of bringing you yet another OCC copper cable the looks nice and sounds good, we took the purist OCC copper that's currently available for production, and we've added to it all of the latest technologies in OCC manufacturing. Our goal was to create the ultimate, end-game copper cable you could find. 

We use a single crystal OCC copper with the highest rated purity of 99.9999%, in a type-6 Litz construction, the most advanced in hookup wires. The cable itself looks absolutely stunning due to its high-priority and sparkles like gold. 

We've also implemented the latest deep-cryo technology, and our copper is enamel-coated to prevent oxidation and significantly reduce electromagnetic interference.

Like all braided cables, the braiding is entirely handmade, and we use some of the best solder wires on the market. 

Sonically the cable hugely outperforms its price and one of the best aftermarket copper cables you can find at any price point.  



The unidirectional UP-OCC has low electric resistance and practically no crystal boundaries. Accordingly, it can transmit electrical signals faster,

and with less distortion than ordinary OFC and silver wires.


All of these features make the pure OCC copper and silver the state-of-the art conductor materials for the audiophile cable industry.




• A true unidirectional copper crystal that is as free from impurities as possible to prevent corrosion

• Flexibility and fatigue resistance without impairing conductive characteristics

• Low electrical resistance

• Rapid signal transmission

• Corrosive-resistant

• Non-crystal boundaries



UP-OCC stands for Ultra-Pure, Ohno Continuous Casting.


The UP-OCC process for refining copper was developed and patented by Professor Ohno of the Chiba Institute of Technology in Japan.

The license to use this manufacturing process is incredibly popular for the production of wire and cable products for the audio/video industry.


In conventional processing, hot molten copper is poured into a cooled mold for extrusion, resulting in multiple, fractionated crystal structure.


While the copper may be "pure" in the sense of measuring gas impurities in the copper in comparison to standard copper refining techniques,

Oxygen-Free Copper (OFC) has undesirable effects that lead many to use more expensive materials such as silver for their conductive strands.


As developed for A/V cable use, the OCC process utilizes a heated mold for casting and extruding, with cooling taking place in a separate process,

the result is a larger crystal size and increased purity that approaches the 6N, 99.9998%!


Looking at it another way, traditional copper has oxygen impurities of 200 to 500 parts per million (PPM), while traditional OFC copper reduces that
to less than 10 PPM. With the OCC process, the figure is cut in half to less than 5 PPM of oxygen,
and less than 0.25 PPM of hydrogen (compared to 0.5 PPM for OFC). 
With these results, the OCC process creates "ultra-pure" copper.