pioneer speakers are teh **** anyways IMO... But as far as wiring... like saturn said, you need a wiring harness kit (like 12 bucks) a kit to mount it in ur dash (another 12 - 20 bucks)... and a few screwdrivers, wire cutters/strippers, personally i like to use solder and heat shrink tubing on my installs, but there's nothing wrong with using quick disconnects or butt connectors... just dont twist em and use electrical tape to hold em or use wire nuts... they corrode, loosen and cause all kinds of havoc... as far as what gauge wiring you need, whoever you talked to is an idiot... cuz unless youre installing an amp as well, you dont need any additional wiring.