How loud can 12s actually get?

I'm pretty sure i'm hitting in the 140s with 1 12" on 1200+ in a trunk car. I was told at least 140 so i don't know.
guy with the pb subs and the kenwood amp might have you beat followed closely by the guy with 3 wally world 12s. so you get 3rd place.//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 
The 12" sealed isn't going to do mid 140's in a standard trunk car. 'Might want to cross that one off your list. The ported 15" option gets my vote for your mid 140's quest.
When I was saying sealed, I meant that the sub would be firing forward and I would seal the sound off from the trunk. The box would be ported. It would be like a blow through. Not a sealed box

 
guy with the pb subs and the kenwood amp might have you beat followed closely by the guy with 3 wally world 12s. so you get 3rd place.//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif
I'm new to the sport so i'm sure you have better but still Having the state usaci record with that set up is good enough for me.

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not sure what my sonix fx and 1500.1 were hitting...in a jeep liberty in 2.5 @38 but it had to be low 40's. chaunch said the same setup hit mid 40's in his trunk.
I really want that sub, but I'm broke. I would hope this recone for my csx will sound similar to this, but with more low frequency extention

 
not sure what my sonix fx and 1500.1 were hitting...in a jeep liberty in 2.5 @38 but it had to be low 40's. chaunch said the same setup hit mid 40's in his trunk.
Well I'll see what I can hit with it once I get it! I have a large car, so I can only hope for 140s out of a single 12. I may try to put it in my back deck some kind of way

 
Well I'll see what I can hit with it once I get it! I have a large car, so I can only hope for 140s out of a single 12. I may try to put it in my back deck some kind of way
i hit a 139.xx on the dash with a single type R 12, in a daily driver box. never metered it in a box built for spl. 140 isn't very difficult. upper 140's is.

 
i hit a 139.xx on the dash with a single type R 12, in a daily driver box. never metered it in a box built for spl. 140 isn't very difficult. upper 140's is.
Whats the loudest daily box I could build for a large trunk car? If I get into the lower-mid 40s daily I'm good. On music that is

 
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