Do speaker wires have to be the same length for each speaker?

ok another question, can I splice 12 ga. to say 14 ga. wire? I don't have a high end system, just don't want to spend $$ on a roll of wire if I can avoid it. Old Pioneer sx980 w/ klipsh forte ii, standard A/T turntable + cambridge CD player.

A storm is coming oldhvymec.

Hey Christian:  Hi they are not the same length because one speaker is +/- 10 further from the equip. The stereo is in the corner of the room due to fireplace location, sliding doors, etc... Also the wire to that far speaker goes under the house so that adds a few feet as well. 

Right Christian, listen to the music!! Last night Dire Straits & Anita Baker, both sound beautiful enough for me on my little vintage system!

p.s. richopp, I moved and changed my address 😀