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» Termpro Audio Forum » Installer's Corner » System Design » 78 caprice classic trunk box

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Author Topic: 78 caprice classic trunk box
beefy
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I'm installing a big system in the trunk of a 78 caprice and wanted to know what problems I would run into by installing 12- 10" subs in it. I can get the airspace sealed. What's the best way to prevent cancellation of soundwaves. What would happen if I just fired them all straight up. The subs should have plenty of power, I can run all of them together @ .67ohms on a Hifonics xx Cyclops, about 333 watts each. Any suggestions would be appreaciated.
Posts: 6 | From: Georgia | Registered: Jun 2006  |  IP: Logged | Report this post to a Moderator
beefy
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O,and this is not my idea of the best setup. I'm doing this for someone else. I tried to convince him that he would be much better with two 18's. but he just wants more subs. any advice would be great, thanks
Posts: 6 | From: Georgia | Registered: Jun 2006  |  IP: Logged | Report this post to a Moderator
etznova
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geez yeah less would most deffinetly equal more in this case

to bad he wont change his mind
i think he need to hear meades car

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Posts: 371 | From: rockford il. | Registered: Mar 2005  |  IP: Logged | Report this post to a Moderator
beefy
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another thing, we already have the 10's, used, I just don't know much about speakers firing toward each other(that is if I have to do that) How bad would that be, really, I need to know. I'm just looking for any advice on whats better in this type of situation. comments, funny remarks, I think anything would help. thanks
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1LOUDSUV
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I'll have to look through my manuals for that one. [Cool]

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*1LOWSUV*
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I think the best way to go with a Box Chev like that is old school-> 10-10's on a slam board!

I've done it before but not with 12 speakers. You face all the speakers towards the rear of the back seat and tunnel all the sound up and through the rear deck.

Thats 1980-81 beat right there. [Cool]

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beefy
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What do you mean when you say "slam board". seal the box? don't think i would have room for ported. Do you tunnel the sound with just Mdf and foam, things of that nature. what's best? thanks
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*1LOWSUV*
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This is a slam board from 1980, its 4-8's.

Yours would be out farther Towards the rear of the trunk to accomodate 10-speakers.

You would have to build sides and a piece for behind the back seat to tunnel the sound up. [Cool]

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*1LOWSUV*
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Another example of a slam board with 6-12's. [Cool]

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Glass City Sounds
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h

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http://www.splmaxcup.com

www.SteveMeadeDesigns.com

www.caraudio.com

www.the12volt.com/caraudio

Posts: 1364 | From: toledo ohio , usa | Registered: Feb 2006  |  IP: Logged | Report this post to a Moderator
beefy
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O, I see, a baffle, I think I will try a combination of the tunneling the sound with a big sealed box in the back, I just don't like the idea of leaving the back of the subs open to the trunk area, more rattles and such. I can get alot more airspace by glassin the bottom of the box, cause of all the curves. Then do the rest in mdf. I can shove all the subs up towards the rear deck, four across and three deep. Tunnel from the top of the box to the rear deck. Maybe this will help eliminate the sound bouncin all around. okay thanks, i do believe i have my work cutout for me now. I'll prally show a few pics later of this wierd situation, as I make progress. o yeah, that 80's isht, is wack, how times change. thanks again.
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*1LOWSUV*
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quote:
Originally posted by beefy:
I just don't like the idea of leaving the back of the subs open to the trunk area, more rattles and such.

Back then we used cans and cans of expanding spray in every nook and cranny. Had to be careful how much you put around the trunk lid seams, too much and it would ding your trunk lid. [Eek!] [Cool]

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*1LOWSUV*
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quote:
Originally posted by beefy:
o yeah, that 80's isht, is wack, how times change.

LOL, you drive a 78 Box Chev but knock the 80's
[Roll Eyes]
I had one of those too but a two-door back in 1985 and now everyone wants them so times really haven't changed too much.
[Cool]

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SacMustang
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man I miss the days of slam boards, had one in my 80 honda accord, it wanged like no tomorrow.

Nice pics 1low those bring back fond memories. [Smile]

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Team SMD
www.stevemeadedesigns.com

2 RE MT 18s
no amps yet
walled off VW Jetta.

Posts: 1088 | From: Sacramento | Registered: Jan 2006  |  IP: Logged | Report this post to a Moderator
*1LOWSUV*
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quote:
Originally posted by SacMustang:
man I miss the days of slam boards, had one in my 80 honda accord, it wanged like no tomorrow.

Nice pics 1low those bring back fond memories.

Then You'll like this.
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[Cool]

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Pitbull
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2 ported 15s gets quite loud in my 80 Impala

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Team Devastation MMA
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Ron caravan man
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with that many subs just buy another vehicle for about 500 to 700.00$ like a van or an old volvo wagon, and wall it! or a 4th order bandpass, that is if u are going for spl! or street beating.decision is yours!

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SS 1-2 competitor! 160+

Posts: 41 | From: mimisburg ,oh | Registered: Jan 2006  |  IP: Logged | Report this post to a Moderator
Do_u_SQ?
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I actually used a "slam board" last year at world finals for USACi. Hit 138.8 db and took first place in SQ...

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Never play leap frog with a unicorn...

Posts: 42 | From: Canada | Registered: May 2004  |  IP: Logged | Report this post to a Moderator
   

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