The Classes are below:
Amplifier Power Rating is determined by Power Testing during the SPL Run!
*Note all maximum power ratings are based on the Official NSPL Power Rating.
1. All amplifiers will be Power tested during the SPL run using a Digital A/C Voltmeter
And a Digital A/C Clamp meter to determine the amplifiers max power (wattage).
2. If the amplifier exceeds the manufacturers rated power then the amplifier will carry
The adjusted NSPL Power Rating. If the amplifier falls below the manufactures rated
Max power then, the clamped power will be the rating. The formula will be
A/C Voltage x A/C Current= Max Power
Example: 90 volts x 20 amps= 1800 watts
Example: Manufactures rating is 4000 watts but clamps at 2500 watts, the clamped
Power rating of 2500 watts is used for class placement. Ie….Trunk 1801-3600 watts.
**NSPL reserves the right to test and rerate the power rating of any amplifier at anytime.
The rerating of amplifiers is to place competitors in the correct NSPL classes.
The following classes are 12 volt and for competitors who do not work in the car audio industry (Sales people, Installers, Store Owners, Manufacturers Reps)
Beginner 0-1000 watts (For First Time Competitors to run for 1 season)
Beginner 1001-1800 watts (1-Extra Battery)
*(Cars, Truck’s, and SUV’s)
**(One run of 4 gauge power wire)
***(Based on Amplifier's Maximum Output Power)
Trunk 0-1800 watts (1-extra batteries)
Trunk 1801-3600 watts (2-extra batteries)
Trunk 3601watts-up (3-extra batteries)
Trunk Hardcore
*(Cars with rear Trunk Storage Area, Seats/Arm rest may be folded down)
**(One run of 1/0 power wire per Extra Battery)
***(Based on Amplifier's Maximum Output Power)
Car 0-1800 watts (1-extra batteries)
Car 1801-3600 watts (2-extra batteries)
Car 3601 watts- up (3-extra batteries)
Car Hardcore
*(Cars must have a rear seat fold down)
**(One run of 1/0 power wire per Extra Battery)
***(Based on Amplifier's Maximum Output Power)
Truck/SUV 0-1800 watts (1-extra batteries)
Truck/SUV 1801-3600 watts (2-extra batteries)
Truck/SUV 3601 watts-up (3-extra batteries)
Truck/SUV Hardcore
*(Quad/Extra Cab Trucks, SUV’s, Van’s must have rear seat)
***(One run of 1/0 power wire per Extra Battery)
Regular Cab Truck 0-1800 watts (1-extra batteries)
*(Based on Amplifier's Maximum Output Power)
The following classes are 12 volt or 16 volt and are for the everyday consumer, and industry Professionals. (Sales people, Installers, Store Owners, Manufacturer Reps)
No Wall 0-24”
No Wall 24”-48”
No Wall 49"-up
No Wall Hardcore 0-24”
No Wall Hardcore 25”-up
No Wall 0-2500 watts
No Wall 2501-5000 watts
No Wall 5001-up watts
*(Vehicles with a Box below the window level, Trucks with rear Cut Through)
**(Vehicles with no Rear Seat. example= Honda CRX, RX-7,)
Wall 0-2500 watts
Wall 2501-5000 watts
Wall 5001-10,000 watts
Wall 10,000-18,000 watts
Wall 18,001-up watts
*(Based on Amplifier’s Max Power Output)
Wall Hardcore 0-5,000 watts
Wall Hardcore 5,001-10,000 watts
Wall Hardcore 10,001 watts-up
Modified One
Modified Two
Modified Three-Four
Modified Five-Plus
Extremely modified vehicles (window’s,interior)
(No Amperage Restriction on Amplifiers)
Insane
*Enclosures Built up to 8inches beyond the B-pilar
**(No Amperage Restriction on Amplifiers)
Music Classes (Commercially available music must be played for a 30 second average)
Streetbass SPL Bracket Racing
0-119.9 db
120.0-129.9 db
130.0-139.9 db
140.0-149.9 db
150.0-159.9 db
SPL Eliminator 30 sec Max Out (All new for 2010)
0-12"
13-24"
25"-48"
49"-60"
61"-120"
121"-up |
