I did a direct swap of 2 cvr 12's to an l715 with the same power, and noticed a nice audible increase in sound. but coming from 3cvr's to 1 l7, uness you are going to throw around 1500-2000wrms at it, i don't thinik you'll be too happry bro. Properly port/tune those 3, and give them about 600rms a peice, and see if that makes you happy. Or do 2 at around 5cuf at 30hz with around 800rms on each one. My single one would take the 800rms for atleast an hour and a half at full volume with no problems. Longest i ever drove
Also, I had 1 cvr 12 taking 800rms in 2.75cuf at 30hz, and it slammed almost as hard as 2 at 3.5cuf @ 30hz each with 400rms.
I hope that made sense. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif