Sub up Port back in a trunk?

[skylineTT 10+ year member]

i have an 87 Mustang notchback and was thinking of a sub stage for it. my problem is space.. it is about 10 inches tall, but there are metal rods at the top of the trunk allowing me about 8 inches of height to work with.

at first i wanted to do a pair of 10s slanted so that they would fit... then i wanted to do 2 8s because they would fit better.. but now im thinkin, "screw the small stuff, i can do a 15 facing up and port facing the rear." my only problem is that ive heard that Sub up Port back in a trunk is a fail. ive always done sub back port back but it wont work this time..

this car is supposed to be a street/strip car as well so its either i try this, or just get a diff car for audio.

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[Lakota 5,000+ posts]

I like sub forward, port to the side/back.

 

[GlocksRock 10+ year member]

But how well does sub up port back work in a trunk? I'm thinking of having a ported box built for my 15, but unless it's sub up port back I don't think it will fit to well.

 

[SQPL 10+ year member]

I think this will work as long as you remove the rear speakers and leave them open so that there will be air flow for the sub.

 

[Lakota 5,000+ posts]

Probably will lose some output.

 

[mazda6i07 10+ year member]

I do sub forward port forward. In my previous setup i have subs up port back. It was okay

 

[GlocksRock 10+ year member]

I think this will work as long as you remove the rear speakers and leave them open so that there will be air flow for the sub.

That's already done, but since I want to put a 15 in the trunk, and there is only about 15.5 inches of clearance and my trunk opening isn't all that large, I don't know how well it would work to do a box that is sub back, port back.

 

[skylineTT 10+ year member]

thats my delima.. as stated in op. oy

 

[snoopdan 5,000+ posts]

Ive put two kicker CVR's in a newer mustang, subs up port to the side and was doing 142's on a JBL 300.1.... not the loudest in the world but a respectable daily beater. And the newer mustangs have way less room than the older ones like yours.

 

[skylineTT 10+ year member]

no the newer ones have more room. my trunk is the smallest trunk ever made in a stang i believe

 

[wishuponansg 10+ year member]

i just went from 2 15s, subs back port back, to a single 15, sub up port back, and it pounds so much harder. its in a 2001 honda civic.