And PSB also declares:
What types of cables or interconnects do you recommend?
PSB Speakers does not endorse any particular brand of cables. We usually use 14-gauge wire when testing speakers. Wire does affect sound and the best way to test this is to find an audio/video dealer who specializes in wire and ask for samples of different brands. We do recommend the following gauge of standard two-conductor wire for wiring distances:
Less than 25': 18 gauge
25-50': 16 gauge
50-100': 14 gauge
over 100': 12 gauge
If you prefer, you can use heavier (lower gauge) wire.
(Oh, Flat Earthers revolt!)