Responses from benchwarmer

I'm gonna limit my focus here to 'Porsche and car audio'My 2012 911 Turbo S Cab has the Bose stereo upgrade. I can't really comment on it though because I upgraded the car with Europipes exhaust and always run with the top down. The car sounds abs... 
How important is it to have identical speaker cable length?
Thank you guys very much for the thoughtful advice!