While most tubed amps already have GOBS of inductance on the output due to the matching transformer, how discernable the added inductance from the loudspeaker cabling will be has to do with the overall frequency response of the amp, the stability of the amp, the bandwidth of the speakers and how well one can hear. What is discernible to some may not be discernable to others. What alters the sonics of some systems, may not alter the sonics on other systems. As a general rule though, increased inductance in a speaker cable reduces high frequency bandwidth and linearity.
Other than that, i don't doubt that the copper foils / ribbons sound excellent. Solid core conductors, minimal skin effect, heavy gauge for low series resistance, etc... These are all key ingredients to minimal signal degradation. Sean
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