Is your V12 from the states? or here?
Nice subs
If you're using Local V12 amp, I don't think it can really power the L7 thoroughly since you're going to be using channels 1 & 2 for seps, 3 and 4 for sub. You're going to be powering your sub less than 200rms :sad:

If hinahabol mo is SQ, 1 sub is good enough. I think L7 can handle more than 500rms. the 12" can go around 750rms. But if you don't use your trunk a lot, go for 2 subs..but DO expect some SPL even if you're sealed.

Agree ako with userfriendly sa #6
If I were you, I'd sell either both my 10's, or 12's. Get fenton 2500 for your seps, then a powerful amp for your subs. Go sealed for SQ. If you sell a pair, you can have over 12k. If you go 1 sub, it will be cheaper to power. You can even get a Thunder Audio Amp 100x4rms, around the same price as V12 amps, to power your sub. That's 400rms using all channels. Then get a fenton 2500 for your seps. If you go 2 subs...You need 1 powerful powerful amp that's 4 channels, and Fenton 2500 for seps. Or you can go 3 amps...1 for each sub,and 1 for seps...