You are correct regarding impedance differences with length.
I, too, have to run long lengths of speaker cable, though it is mostly for aesthetic reason...
In my opinion, I would run two identical lengths of cables. Though it costs more, it will give your amp a break and should sound better, as well.
Rather than coil the excess, try to disperse it randomly (I know- sounds easy), but it would negate any magnetic distortions that coil wound cable may induce.
If anyone can give you the exact science of this, it would be Agon member Almarg. Perhaps you should PM him.
I, too, have to run long lengths of speaker cable, though it is mostly for aesthetic reason...
In my opinion, I would run two identical lengths of cables. Though it costs more, it will give your amp a break and should sound better, as well.
Rather than coil the excess, try to disperse it randomly (I know- sounds easy), but it would negate any magnetic distortions that coil wound cable may induce.
If anyone can give you the exact science of this, it would be Agon member Almarg. Perhaps you should PM him.