A Supra concept for cleaner sound. The tin is of higher resistance than copper
and also protects copper from bad sounding corrosion. It also mini-mises the
current jumps from wire to wire over corroded copper sur-faces while more of
the signal passes through the pure copper inside the wires. The tin layer also
minimises the skin-effect, by acting as a semi-Litz.
Only when the frequen-cies are very high, as in digital signals, does it seem
wise to go the opposite way, i.e. to silver plate for a lower surface
resistance. At such high frequencies it is hard to keep the signal inside the
wire, so instead we design for an easier surface current flow.
Important properties of digital cables are a high propagation velocity factor
and a correct and stable characteristic impedance (Z).
Low capacitance (C) is important.
Microphone- and line cables
Low microphonic effect, and low capacitance assist quality.
Loudspeaker cables generally need to be of low inductance (L) and preferably
also of low resistance (R).