rear speaker cups - Chevy Impala SS Forum
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post #1 of 14 (permalink) Old 04-08-2007, 09:18 PM
fuzzcar
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When changing out my rear speakers I noticed how they used some thin foam "cups" around them, I guess for acoustical reasons. I thought maybe it would be a good idea when I upgrade the sound system a little more to make my own cups better insulated than the stockers. I was thinking of maybe fiberglass, with thick acoustical foam lining.

Has anyone doen this before?
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post #2 of 14 (permalink) Old 04-08-2007, 09:26 PM
mr k gee
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Im sure someone has. And it would be an improvement Im sure. Especially if running subs.
post #3 of 14 (permalink) Old 04-09-2007, 02:22 AM
PIMPALA-SS
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6x9 speakers are designed to run in the rear deck "infinite baffle", or "free air" and if you put them in a tiny enclosure, then they will sound like crap, adn have little to no bass at all.


the foam that is there from the factory is NOT like sealing them with a fiberglass enclosure.
 
post #4 of 14 (permalink) Old 04-09-2007, 04:39 AM
fuzzcar
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Well I didnt exactly mean "sealed enclosure", just better enclosure. So not only would it sound better but next time I go to shoving a bunch of boxes in the trunk I dont rip one of the cups. What think ye?
post #5 of 14 (permalink) Old 04-09-2007, 09:00 AM
mr k gee
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Wait your gonna run a 6x9? or 6.5"
post #6 of 14 (permalink) Old 04-09-2007, 09:50 AM
sherlock9c1
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Quote:
Originally posted by PIMPALA-SS™:
6x9 speakers are designed to run in the rear deck "infinite baffle", or "free air" and if you put them in a tiny enclosure, then they will sound like crap, adn have little to no bass at all.
Jason, what about if you're running two free-air 10's in a baffle board against the back seat - would the subs effectively be pushing the 6x9 cones around?
post #7 of 14 (permalink) Old 04-09-2007, 10:45 AM
PIMPALA-SS
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Quote:
Originally posted by sherlock9c1:
</font><blockquote>quote:</font><hr />Originally posted by PIMPALA-SS™:
6x9 speakers are designed to run in the rear deck "infinite baffle", or "free air" and if you put them in a tiny enclosure, then they will sound like crap, adn have little to no bass at all.
Jason, what about if you're running two free-air 10's in a baffle board against the back seat - would the subs effectively be pushing the 6x9 cones around? </font>[/QUOTE]yes. but a foam cup wont help that much. the pressure from the subs will not only get to the 6x9s from the back, but the pressure inside the cabin will also push them around.
post #8 of 14 (permalink) Old 04-09-2007, 10:49 AM
UndercoverPunk
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Yes, yes they will. But really any decent substage will push around your smaller speakers.... it's gonna happen. In my old car I would burp tones in the substage and you could watch the front speakers move.
post #9 of 14 (permalink) Old 04-09-2007, 10:57 AM
sherlock9c1
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Quote:
Originally posted by PIMPALA-SS™:
... but a foam cup wont help that much. the pressure from the subs will not only get to the 6x9s from the back, but the pressure inside the cabin will also push them around.
Sorry, I should have clarified - yes the foam cups are useless (threw them out last night, as a matter of fact). BUT... I've seen guys actually build real enclosures for their 6x9s in the back deck, and they do make sturdy plastic sealed baffles (Pep Boys carries them) that would be probably be decent with a layer of dynamat around their outside to prevent resonance. But.. the volume of these things is very small (probably 1/8 cu ft), so you'd only get bass at small volumes. Maybe this is a big deal about nothing? Just leave them free-air then?
post #10 of 14 (permalink) Old 04-09-2007, 11:47 AM
bbodyguy
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Yes, leave them free air.
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