Component Installation

I have a set of JL XR650-CSi components that will be installed in the doors of my 2001 Civic. They will be powered by a JL 300/4 and mounted in the factory locations. I have also purchased a roll of "B-Quiet" to install in the door panels and have bought "Cascade" 7-inch damping discs to place behind the speakers. I have a couple of questions regarding the install as I'm primarily concerned with SQ for my system:

1) Would it be of any benefit to mount the 6.5 inch speakers on a piece of MDF inside the door? Or will the "B-Quiet" and damping disks be enough? I've seen this done on another install, I'd assume in an effort to prevent any resonance/reverberations with the speakers.

2)One or two layers of sound deadener in the doors? I have a 50 square foot roll but also need to do the trunk.

Thanks to anyone who can help.       

Thanks for the advice. I never thought about doing the inner and outer panels of the doors. I just assumed you'd remove the panels and cover the inside. As for the MDF, I guess I'll see when the panels are off. Civics (or mine anyway) rattle like you wouldn't believe. I think I've developed O.C.D. over finding new noises while driving. I figure the mount for the speakers will be pretty flimsy.

As for the trunk, I think I'll probably do a layer or two, if possible. I have a 15" Brahma to go with a JL 1000/1 and I want to eliminate any extraneous noise. Right now, with two old 10" JL's and a Kenwood amp there's numerous rattles and vibrations. Thanks again, Boulderguy.

If your gonna put a 15" brahma in the trunk, I'd put priority on the doors. Do 2 layers on the doors, then use the rest on the trunk. That speaker is really gonna render the B-Quiet almost futile. If you have a 4 door you could do 2 layers up front and 1 on the back. That 50sqft will go a long way.

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Nik
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It's a two-door, so I'll do two layers in the front doors then. I think another problem will be the rear deck. I'm going to buy foam baffles (XTC) for a set of Diamond Audio 6x9's in the back and put weather stripping along the rear deck to try and prevent rattles. Is there a point in using B-Quiet on the rear deck? Thanks!

YES - I'd definitely use some in the rear deck.  Basically use it in any surface you're installing a speaker into (to dampen that surface, like having your hand on a bell when it's ringing) and any surface you want to insulate, like the inner doors so the sound isn't as loud outside as inside (and keeps outside noise out also).

Okay, I'll go with weather stripping and B-Quiet on the rear deck, two layers in the doors and the remainder in the trunk. Thanks for all the advice, guys.