Ok, I am not asking for people to "guess how many DB's this system is" but for you all just to give your opinion on whether this in person estimate is right (estimate given by local audio shop. Crossfire, Diamond Audio, and JL dealer just fyi).
They said that I am hitting the low 140's with this exact setup.
Edead V1 SE sound deadened trunk 2002 Mitsubishi Lancer ES (rear seats fold down, HUGE bass improvement) Pioneer Premier 470 1.2 Farad Capacitor and 85 amp alternator that keeps a steady 14.2-14.4 volts generally. Crossfire 600D (rated at 879rmsX1 @ 14.4V) 2 12" Arsenals Sealed box with 1.25 cubic feet per chamber.
well if u only have 1 crossfire 600d i would guess around 135 i highly highly doubt in a sealed enclosure n' 879 watts goin to 2 750 rms subs u would hit 140.. prolly low to mid 30's is mah guess