where to start... lol
The loudest official number.. in DB Drag (beginning after they put the 80hz limit into place) is a certified 175.5 held by team Pure Sound, running 13 CV Stroker 15's and 13 Zpaco 9.0 amps..
The loudest official number set at the DB Drag Finals.. is a 174.4 (might be a couple tenths off, I cant remember) which was set by Michael Hughes, with him running 4 Digital Designs 9515s and 16 Crossfire 1000d amps.
Alma Gates held the loudest overall SPL for 3 years, but it wasn't as loud as the above competitors, and it was with her old install (64 modded PPI flat 10's and 32 PPI 2400 amps. Last season in DB Drag she ran 48 L7G 10's with 48 ZR1000 amps..
The loudest certified DB Drag score with 1 sub, is held by Nathan Munson, he ran a single DD 9515 with 4 DEI 1100d amps, and hit a 170.8db ( Nathan has also hit a 169.3 with a single DD 9510-- yes, a 10" woofer, and 2 VIper 2500d amps...
John henry ( the mmats van) did hit a 174.4 db, but this score isn't given credit, since he did it before drag imposed the 80hz limit....
Loyd L.