Timing will be off? Unless the disparity is great, you will never hear a difference. Keep them the same length and avoid pangs of audiophile neurosis. It's all in your head anyway.
Does unequal speaker wire length matter?
My amp is not located centrally between my speakers. Due to the layout of my listening area, the amp is about 10 feet from one speaker, and adjacent to the other - and this will not change. I am currently using two 4-meter cables, but one of them need only be about 1 meter. I am looking to upgrade my cables, could I get away with unequal lengths and save a good bit of money?