8 Different Competition Classes

Trunk SPL - First-time competitors with rear trunk passenger cars. Power Classes by wattage (Stock 0-500, 501-up and Modified unlimited wattage)

Beginner SPL - First-time competitors with no walls and rear seat installed. Power Classes by wattage. Beginner Car (0-500, 501-up) Beginner Truck/S.U.V. (0-500, 501-up)

Regular Cab Truck - First time competitors with Regular Cab Pick-Up Trucks

Amateur SPL - Seasoned competitors not affiliated with the 12-volt industry. Power Classes by wattage (0-1200, 1201-2400, 2401-up) Hardcore - (0-2400, 2401-up)

Pro SPL - A competitor who works in the industry of electronics. Power Classes by wattage (0-1200, 1201-2400, 2401-up) Hardcore - (0-2400, 2401-up); Pro No Wall - (unlimited)

Unmodified Speaker SPL - Competitors classed by the number of woofers in the vehicle.
(0-30" No Wall, O-30", 31"-60", 61"-up)

Modified Speaker SPL - Competitors with extremely modified vehicles classed by the number of speakers in the vehicle. (0-30", 31"-60", 61"-up)

Insane SPL - Competitors with Insanely-Modified vehicles; No power classes