Quote Originally Posted by simonzaide View Post
Sirs i have another question.. if i go the 3 way route it means i will need to disable my rear speakers since this will mess the tuning. Is it possible to replace these rear speakers with a pair of small subs lets say around 2 pieces of 8 inch subs

Subs will be mou ted where the speakers are of course this would entail retrofit for it to fit

I was thinking of this because i wanted to save on trunk space
Yes. If you're taking the SQ route seriously, disabled rear speakers are preferred. Tuning 7 speakers are already a pain in the ass, if you throw in your rears, it becomes a whole different level of difficulty. That's not to say that rear speakers will always mess the tuning, it's just that getting them right is extremely hard.

Okay, your problem in those small subwoofers will be phasing and vibration. As your rear speakers are facing towards each other, your sound waves will also interact differently than that of a pair of subwoofers side-by-side. If you plan on saving up on trunk space, I've seen a lot of 8" and 10" subwoofer installations on the passenger footwell. That might compromise your passenger's ability to stretch inside your car but truthfully, it's quite a good location.

A subwoofer, once tuned well, simply blends into the music. In installation, you want a rigid enclosure - one that doesn't vibrate much because every vibration is lost power (it cancels out the waves inside the enclosure having you end up with less output). Another thing is that you want your subwoofer to be vibration-friendly towards your cabin. Vibration is the reason why we hear our subwoofers at the back. If you've manage to listen a LnC car, you're bound to always hear the bass at the back. The reason for this is (aside from proper tuning) vibration due to subwoofer output but if you listen to a subwoofer in a cinema.. you'll be damned where to find it. This is because not only is it properly tuned to coincide with the other drivers but there's no physical cues to give away its location.