whats louder 3 15's or 2 l7's

I have a choice to make right now. What will have more spl, 3 kicker compvrs 15's wired down to 2.67ohms using a jbl 1200 bp.1 amp in a sealed enclosure. Or 2 kicker l715's in a vented enclosure wired down to 2ohms, using the same amp but I will use add a sub sonic filter to the amp so I dont damage the i7's. Now remember Im not looking for sq just spl, And the amp wires will all be 0/1 gauge and I already have an ho alt that is 220.

Thanks

I kinda of figure that, but we are talking 3 round 15's against 2 square 15's that are suppose to be the best of kicker. Now about the enclosures, both will be built according to kicker specs, so Im undecided, but its cheaper for the 3 15;s I know that for a fact, but I dont want to be cheap and come out on the short end, so I want to know which is louder, and educated guess, will do real good.

Thanks

Here's a look at the three compvr's:  cb_response_kicker_compvr15.gif

You can go with a lot more power than you have.  Go to 1500 watts for an increase of about 5 db  And note that this is a large box:  5 to 7 cu ft.  You'll have to make a determination of how much space you can give up for it.  The ported box will be even bigger.

The SD for three VR's is 2643 cm^2.  SD for two L7's is 2112 cm^2.  So the three round drivers have more cone area than the two L7's.

Here's a ported response for the two L7's using a 7 cu ft box (plus port) and equivalent port area of 7.5" diameter  X 12.9" length round port.  Fb is 30 Hz.  vb_response_kicker_s15l72.gif  Make sure you use a good subsonic 24 db filter set at 25 Hz.  The graph shows response without the ss filter.

Power can be increased substantially to these as well, going up to 2000 watts.  You could gain 5 db with that, too.  And the SPL increases much more because of cabin gain.  Actual in-car db levels will be higher than the graphs show for that reason.

The L7's in a vented box will have the edge in SPL, and you can work with box size and ports a little more on your own, too.  But you should really provide more power if SPL is what you want.  Decide on the amount of power before you design the port, etc. because with more power the area of vent opening has to be larger.  For 600 watts input, the size port I showed above is large enough that you won't get port noise.  You can calculate the equivalent slotted port ( pi R^2 ).  How-to is spelled out in this previous thread:

https://www.the12volt.com/installbay/forum_posts.asp?tid=60783&KW=equivalent