RCA cables make a difference? or is wire just wire?

I have an appointment to get my system installed this Sat, however, the RCA wires I wanted to get was out of stock (they are the Krystal Konnects by KnuKonceptz, very cheap but good quality).

The only ones they have in stock are the lower end line (Karma series) which are not balance twisted... does that make a difference? or would that be fine?

I am just trying to decide if I should reschedule my appointment to next week for the install or not...

Please let me know what you think! thanks!

Moreover, anyone know what's the length that we need? actually, they do have some 4 meters available (12ft) but I am not sure if that's enought....... Please advice!!!!!!!

for any type of audio / video applications, cables DO matter.. depending on the type u'll notice small to big differences in performance but i wouldn't use some crap lower end line cables..

If it makes a difference, you probably won't hear it in your car...unless you spend a lot of time parked with the engine off. Cars are too noisy to justify spending all that money on cables. It's your money, though.

tm