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Fiberglassing Door Panels

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Member - Posts: 14
Member spacespace
Joined: April 05, 2006
Location: United States
Posted: May 28, 2006 at 9:40 PM / IP Logged  

would it be...or would it not be a good idea to fiberglass inside of the doorpanel of my car to help reinforce the speaker location and also make the door a little heavier and create some sound dampening effect?...does this happen with fiberglass?...or am i waisting time, money and energy?...not the whole door...just in the general area where the speaker mounts to?...i have a 97 civic coupe and the speaker mounts to the door...i upgraded the sotck speakers and they sound awful...i am sure its because i am losing alot of enery via mounting the speak to flimsy plastic...i am going to amp them tonight...but i know if i dont do something they will still sound terrible..just louder...any DIY sound appreciated...

"it was a rhetorical question...what have i told you about thinking"
Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: May 28, 2006 at 10:42 PM / IP Logged  
Having a solid baffle does help for SQ. Do what you have to to make the baffle as solid as possible. Fiberglassing the back of the panel will help add weight to the door panel and will also help attach the speaker to the panel, so it's a win-win situation.
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Member - Posts: 13
Member spacespace
Joined: May 03, 2006
Location: United States
Posted: June 04, 2006 at 12:27 AM / IP Logged  
i try to fiberglass small round boxes for my door speakers about the size of a cool whip dish but usually i make them a little bigger. ive done it a few times it make even some factory speakers sound as good as aftermarket!!! almost anyway.
rattles suck lets hear your system
Copper - Posts: 204
Copper spacespace
Joined: March 15, 2006
Location: United States
Posted: June 04, 2006 at 3:43 AM / IP Logged  
if you completely airtight seal door speakers though isn't it bad for them since most of them are designed for freeair/infinite baffle usage?
fiberglass reminds me of peanut brittle... but fiberglass tastes better!
Silver - Posts: 322
Silver spacespace
Joined: September 08, 2005
Location: Australia
Posted: June 04, 2006 at 4:44 AM / IP Logged  
Depends on the brand and model, some perform better in a small box
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Member - Posts: 7
Member spacespace
Joined: June 23, 2006
Location: United Kingdom
Posted: June 24, 2006 at 3:02 AM / IP Logged  
I know in my car the door was pressed cardboard and very flimsy, I took out and filled all the 'terrain' in the panel with expandable foam (the stuff boat builders use).
It added little weight but was *much* more solid, no rattling at all when playhing the stereo.
Hifi Hacks
Member - Posts: 32
Member spacespace
Joined: July 24, 2006
Location: United States
Posted: July 28, 2006 at 11:30 AM / IP Logged  
whats up kaace, i have a 98 civic ex and i am going to do the door panel over and fiberglass the hole slot where the factory speaker was at, kinda like a miniature sub box. hopefully it will come out looking like thisFiberglassing Door Panels - Last Post -- posted image.

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