Speaker Wire Question...

I have decided......since 1) I cannot find the American Legacy amp I know I have somewhere and 2) since I am too cheap to buy another one, I am going to run this Kenwood radio as is with no amp. The car is insulated to heck and back with Kilmat so It's gonna be pretty quiet. It's also a stock 170 slant six with stock quiet exhaust so it's going to be quiet there too. So my question......the radio has really small speaker wires. I would guess 20ga at the biggest......maybe even 22 or 24ga. Should I just run that size? Thank you drive through.