I am wondering if any has used DB Drive. If I use the dd z1a it puts me in a higher class (Modified 1001-2000 Watts) with out put somewhere near 5000 watts and more competitors . But if I use 2 DB Drive A7 2000.1 if puts me in a lower class(Modified 0-1000 Watts) with a total somewhere around 3800-4000. WHAT DO I DO?????