The_Quiet_One
10+ year member
CarAudio.com Elite
Between an 8 and a 15 assuming ideal target enclosures that interact with the car perfectly. the only difference will be in magnitude. But of course this is like solving introductory physics problems, *ignoring everything that may throw a kink in your calculations*. A lot of time larger size woofers are implemented poorly and that's why that thought persists over time.