Fiberglassing Components In Doors

[Alpine CDA-9815 10+ year member]

Well I'm gonna be putting my Boston Acoustic 6.5 Pro 3 Ways in the doors. Going in a 1994 Camaro Z28. I'm looking to get the most midbass and SQ out of these as much as possible, will be powered by a Alpine MRV-F545. Now first off I'm wondering if I should put the tweeter in the A-Pillar or on the plastic peice by the side morrors, or put them in the glass in the doors. Second I'm wanting to know if I should seal the components, or leave the back side open. Some people say by sealing them they will sound "tinny"/"muddy", and that I don't want. Though others say if I don't seal them they will sound bad and I won't get the midbass out of them that I should get.

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[packerfan 10+ year member]

Test, test, test and more test.

 

[Alpine CDA-9815 10+ year member]

Too much time/money to test, answers answers answers //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[packerfan 10+ year member]

Alright, well how much power will that alpine amp give the components? Those BA tweets are awfully harsh IMO so i would put them in the doors also. Thats me personaly though.

 

[Ti22 10+ year member]

I hear that for phasing and sound alignment purposes the tweeter should be no more than 5" away from the midbass, but seriously you should do what packerfan said to do and test, even if you don't have the time, because this is going to be your system and you want it to sound best to you, not what someone else says, even if they are right, my .02 anyway.

I am actually doing something similar tomorrow, I am glassing my kicks though, can't wait to hook up my CDT EF-61's!!!! They are in my room feeling neglected! I am actually going to hook the tweeter up next to the midbass and see how it sounds, and also (even though I have been told not too) hook them up to my apillars and see which I like better, and if I like the apillar location I am going to just put stock tweeters in kicks, because like you I want some good sq.

 

[squeak9798 5,000+ posts]

Now first off I'm wondering if I should put the tweeter in the A-Pillar or on the plastic peice by the side morrors, or put them in the glass in the doors.

As was said; you typically want the tweeter and midrange as close together as possible. But the only way to know for sure what works best in your car and install, and your personal preference, is to try them in different locations. And as packerfan said, the BA tweeters can get pretty harsh. So the further away from your head, the better.

Second I'm wanting to know if I should seal the components, or leave the back side open. Some people say by sealing them they will sound "tinny"/"muddy", and that I don't want. Though others say if I don't seal them they will sound bad and I won't get the midbass out of them that I should get.

This is totally dependent upon the speaker in question. Most car audio speakers are designed to work best infinite baffle (i.e. no box, since they are designed to work well in doors). Hence why if you were to put a speaker designed to perform best infinite baffle into a box, the sound will be "tiny" and "muddy". You would be severely hampering the performance of a driver (just the same as if you were stick a sub in WAY too small of an enclosure....). Now, granted, there are some speakers that will perform better in an enclosure. With these speakers, you again would be hampering their performance if you installed them IB in your doors (and they would lack midbass compared to being in an enclosure).

So, your best bet is to check with BA or your local dealer and see if they recommend the midbass be installed IB or in an enclosure. If they recommend an enclosure, be sure to verify what size. Just like with subs; box and size (or lack there of, such as IB) will greatly affect the performance of the midbass.

I can tell you from experience though....I had my BA Pro6.5 mids IB in my doors, and they didn't lack midbass or sound tiny //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

However, you are going to want the midrange to have airspace separated from that of the midbass (i.e. don't have them sharing airspace).