With low output impedance ss amps and the typical heavy gauge speaker cables used today, the length is less critical than years ago when high output tube amps and thin gauge zip cord were used exclusively in yesteryear.
Reasonable differing distances with most speaker cable won't affect time very much, but depending on the cables used might load the amps channels differently.
Perhaps the best reason to buy identical lengths of speaker cable is to facilitate resale value.
FWIW, I always use identical lengths.
Reasonable differing distances with most speaker cable won't affect time very much, but depending on the cables used might load the amps channels differently.
Perhaps the best reason to buy identical lengths of speaker cable is to facilitate resale value.
FWIW, I always use identical lengths.