In people's experience is it necessary to have the same length runs of cable for each of the channels in a 5.1 set up. I remember being advised that this was a good idea when I was buying my two channel system but with five channels it could prove costly and there will be alot of uneccessary cable being wasted. Secondly. Is it advisable to use identical cable for all the channels. I was thinking maybe some QED silver anniverdary for the front 3 channels but skimping with some cheapr QED stuff (mabe the flat one) for the rears. Thanks for any help.