How important is it to have identical speaker cable length?

Truly great sounding systems come from fanatic attention to details. The little stuff adds up to be of major importance if you are working towards a truly great sounding system. You can get good sound out of a system made up of really good synergistic components. But for truly amazing sound you need carefully chosen cables, interconnects, power cords, cable lifters… tweaked room… etc. it is a question of what your end objective is. While you may not hear a difference outright in a difference in length, it will have a very small effect on the sound… it is a shortcut. Short cuts add up to a sub optimal. For me, instead of spending a couple hours trying to figure out if I can hear a difference, I’ll just go along with the recommendations from the professional reviewers and use equal lengths.

I’ll just go along with the recommendations from the professional reviewers and use equal lengths.

Even if engineers have said the values are so minute the human ear can  not differentiate the capacitance or inductance.

Most important for resale value.

Just for devilment: what do you do with the extra cable on one side?

Coil it? No, that adds inductance ...

Drape it over an iron railing? More inductance ...

Route it beside power cords? No, that adds a 60Hz component ...

Here is a question: Are 60’ speaker cables going to effect the wpc?