ok that is some bull doody if i have ever heard it. there is NO WAY IN HELL you can produce 174.2 with only 2 RF amps and 4 HE2 10"s. if you could then everyone would do that to get really loud. i think you typed a 7 when you meant to type a 4 my man. i have 4 HE2 12"s in my car right now with 1 1000 watt RF the second most powerful amp they make, considering there most powerful is a 1500 watt amp. and with those 4 12"s i was only hitting 154.2 at the cone. so 20 more DB even if he used 2 of my amps couldn't do it, no chance. but that is just my analysis on the situation.
keep it thumpin,
adam