Gerrardasnails:scene:Neon K:
The length he's talking about - it's probably fine, if it's only a couple of coils. But who knows? I don't!
A 4m length vs. a 1.5m length will make very little perceptible difference if the cable is of a decent weight, i.e. you won't get a huge difference in signal loss. However, the longer length will be more susceptible to picking up interference, especially as it's going to end up coiled up somewhere, probably behind your amp, with all those power cables, etc.
If it's got pre-fitted crimped or air-lock plugs, you don't want to be changing them, otherwise, I'd be tempted to cut one of the cables in half - to give you 2x2m lengths (I always find a little slack is useful) and save the spare 4m for other use, even bi-amping / bi-wiring...
I don't think he's talking about unequal lengths.
I've just re-read my post, and it is a bit unclear... Sorry.
I didn't think Torres09 meant he was going to cut the cable to two unequal lengths, I thought he was talking about shortening them both to 2x1.5m. I just thought, all things being equal, that cutting one down to 2x2m lengths might be the best approach, as this gave 0.5m of play for moving speakers around, etc, and left him with 1x4m length for other use...