one sub capable of 140+dB power by a tantrum 1200.1

In the Seville? You are going to have to fire fwd & try to seal off from cabin.

Other then that, ummm, it isnt horribly hard to break 140 TL. In my experience at least.

 
give me a sub that ud recommend for this project.. i have the tantrum already im lookin for one sub.. doesnt matter the size 10-15" ..but there can only be one. sub will be put in an enclosure that will be designed for SPL.

when i get my system metered i'll let you know. (check sig) my box is more of an sql box. it's pretty loud and with an spl designed box with more sound deadening then what i have, i think it's very doable.

 
Those l7's will outperform in a 1/2 assed install.

You are only feeding that pair 1200rms?

Have you run your in box impedance? Do you know how bad the tuning peak is?

....wait, have you made a run on the TL yet? Those two should easily break 140.

 
2 12"s and ur having a hard time reaching 140? WTF? Man in a ported box they should hit over 155 maybe even 160

Nope, he definitly has not been on a meter EVER //content.invisioncic.com/y282845/emoticons/banghead.gif.8606515f668c74f6de0281deb475b6fd.gif

 
ONE Stroker 18" with 2kw put up 144.x TL legal in my truck.
140 is not much of a challenge IMO.

well it's harder to do it with 1 sub instead of 2 i guess. i'm not even trying to hit high marks but i got to be somewhere in the 130's atleast with mine so he should be able to pull this off quite easily.

 
i hit a 135 with my last setup with 2 subs each getting 150watts a piece... and this BLOWS that setup away...like probaly 2 or 3 times as loud if not more.. im garaunteeing its at 140... i will find out as soon as its a bit nicer out and their comps again..or i might take a ride to a shop good bits away they got a meter

 
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