HiDiamond TOP EXCLUSIVE Speaker D9 
 
HiDiamond Ultra-Pure Reference Speaker Cable with 16×4mm² UP-4VRC© Conductors
 
This reference-grade speaker cable represents the apex of HiDiamond’s ongoing refinement of its exclusive UP-4VRC© (Ultra Pure Single Crystal Copper) technology. The conductor processing has now reached the level of ULTRA-PURE OXYGEN FREE 4VRC©, offering one of the most transparent and dynamically accurate signal paths available in the high-end cable industry.
 
With sound transmission as its primary design priority, this model features an exceptionally robust conductor array of 16 × 4 mm², allowing for massive current handling, reduced skin effect, and optimal damping factor control — key to preserving microdetail, transient speed, and powerful, controlled low-frequency response.
 
Thanks to the use of UP-SCC 4VRC copper, combined with precise conductor symmetry, this cable offers:
 
Low resistance and minimal signal loss
Superior imaging and spatial accuracy
Effortless dynamic swings with true tonal balance
 
The insulating materials and construction geometry further contribute to exceptional EMI rejection and timbral fidelity, making this cable an ideal solution for ultra-high-end speakers, monoblock amplification setups, and reference listening environments.