The Gold 2 fuse from HiFi TUNiNG is constructed from a ceramic body, tuned for resonance control, with pure silver internal wiring precisely calibrated for the specified fuse rating. On either end of the silver wire is a pure silver end cap coated in 24K gold for improved signal transfer and corrosion protection.

The UK-Supreme 3 fuse from HiFi TUNiNG combines the technology from Cardas alongside HiFi-TUNiNG construction to form a superior fuse to previous Supremes. Both the end caps and the internal wiring are constructed from Gold-plated Cardas Low Eddy Copper, housed in a black ceramic tube and cryogenically treated. The commonly noticed improvements have been described as 'highly musical' and 'very detailed, dynamic sound'.