btw,
His Guidance, do the ’between the lines’ math
17 awg, 4 ohm: 20lf max
15 awg, 4 ohm: 30lf max
"Simply removing and cleaning the wires and terminals and reconnecting them can make an audible difference".
An advantage of the removable connectors shown: remove the connector; cut off the prior stripped conductors; strip 1" and you have new copper.