kind of a strange question but if i were to get rockford fosgate t1500-1bdcp and put 2 Kicker CVR 12s in a ported box would this really be that loud.
the 12s are 400rms/800 max amp is 1000 watts rms at 2 ohms
Without the power rating of the subs and amp, It's hard to say. But I'd say it would sound good.
Next time you ask a question, you should use more info, so we can answer you better.