dB Drag Racing Class Matrix Reference

Class Normal Use Vehicle Mods Woofer Qty Walls
Street Stock B-Pillar Forward OK Unlimited No
Street Trunk Trunk Forward No Unlimited* No
Street A Everywhere No 1-4* No
Street B Everywhere No 1-8* No
Street Max B-Pillar Forward No 1-4 OK
Super Street NW B-Pillar Forward No Unlimited No
Super Street 1-2 B-Pillar Forward OK 1-2 OK
Super Street 3-4 B-Pillar Forward OK 3-4 OK
Super Street 5+ B-Pillar Forward OK 5+ OK
Extreme Exempt OK Unlimited OK

 

Class Max Conductors Max Amps Podium Pro / Veteran
Street Stock 4 per sub 2000 W Total No No
Street Trunk 4 per sub 4000 W Total No OK
Street A 2 Total 1* No OK
Street B 4 Total 2* No OK
Street Max 4 Total 2* OK OK
Super Street NW 8 Total* 4* OK OK
Super Street 1-2 4 per sub Unlimited OK OK
Super Street 3-4 4 per sub Unlimited OK OK
Super Street 5+ 4 per sub Unlimited OK OK
Extreme 4 per sub Unlimited OK OK

 

Class Battery Qty Battery Size Battery Box Capacitor Qty
Street Stock 1 Standard 800 in^3 No 2F
Street Trunk 2 Standard 800 in^3 No 2F
Street A 1 Standard 800 in^3 No 2F
Street B 2 Standard 800 in^3 No 2F
Street Max 1 800 in^3 No 2F
Super Street NW Unlimited Unlimited No Unlimited
Super Street 1-2 Unlimited Unlimited OK Unlimited
Super Street 3-4 Unlimited Unlimited OK Unlimited
Super Street 5+ Unlimited Unlimited OK Unlimited
Extreme Unlimited Unlimited OK Unlimited

 

Class Alternator Qty Max Volts Vehicle Run Hi Freq Limit
Street Stock 1 12 (15 Max) OK 60 Hz
Street Trunk 1 12 (15 Max) No 60 Hz
Street A 1 12 (15 Max) No 60 Hz
Street B 1 12 (15 Max) No 60 Hz
Street Max 1 12 (15 Max) No 60 Hz
Super Street NW Unlimited 18 Max OK 80 Hz
Super Street 1-2 Unlimited 18 Max OK 80 Hz
Super Street 3-4 Unlimited 18 Max OK 80 Hz
Super Street 5+ Unlimited 18 Max OK 80 Hz
Extreme Unlimited 18 Max OK 80 Hz

 

Class Matrix Notes

Street Stock Division

  • 2000 Watts Max

Street Division

  • Street Trunk – No woofer quantity limit (Maximum 4 conductors per sub) – No amplifier quantity limit (Maximum 4000 Wrms total) – All amplifiers and woofers must be installed within the trunk
  • Street A – 1-15 or 2-12’s or 3-10’s or 4-8’s / Maximum of 1 amp (or 2 monoblock amplifiers) – 2 Conductors total between amp rack and sub enclosure
  • Street B – 1-18 or 2-15’s or 4-12’s or 6-10’s or 8-8’s / Maximum of 2 amps (or 4 monoblock amplifiers) – 4 Conductors total between amp rack and sub enclosure

Street Max Class

  • Maximum of 2 amps (or 4 monoblock amplifiers) – 4 Conductors total between amp rack and sub enclosure

Super Street NW Class

  • Maximum of 4 amps (or 8 monoblock amplifiers) – 8 Conductors total between amp rack and sub enclosure. Maximum 4 conductors per sub

Glossary of Terms

  • Alts – Number of alternators permitted
  • Amps – Maximum number of physical amplifiers permitted
  • Battery Box – Battery box permitted
  • Battery Qty – Maximum number of batteries permitted
  • Battery Size – Physical size limits for each battery in cubic inches
  • Caps – Number of Farads permitted
  • Maximum Conductors – Maximum number of electrical conductors between the amplifier(s) and the sub enclosure. A normal speaker wire is composed of two conductors; 1 for positive and 1 for negative.
  • Normal Use – Normal use restriction applies
  • Podium – Podium use permitted
  • Power – When amplifier power limits are specified, the dBDRA will use the maximum published RMS rating for the amplifier. The dBDRA reserves the right to verify the accuracy of any published rating.
  • Run – Vehicle may be running during competition (Maximum RPM is limited to 2000.)
  • Standard Battery – 12-volt, 6-cell (connected in series), lead-acid or gel-type battery.
  • Vehicle Mods – Structural vehicle modifications permitted
  • Volts – Battery voltage (value in parenthesis indicates maximum voltage in the lanes)
  • Walls – Walls are permitted
  • Woofers – Number of woofers allowed