Placement of Sub and port for best response.

[AxT4430 10+ year member]

First, Response is subjectively defined by me as audibly louder to my ear with clarity.

Next, I have a honda civic 4 door. My sub and port face backwards at the trunk hatch. I have the hatch deadened, its a flat surface.

Will I theoretically experience better response facing the sub/port forward or sub/port backwards facing. Assuming seats up or down for both.

My subwoofer is a 15", it has a few inches between the top of box and bottom of trunk lid. Its about as wide as trunk as well.

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[AxT4430 10+ year member]

Bump.. @pro\-rabbit; can you move this to general or advanced spl subforum?

 

[NASTY08IMPALA 5,000+ posts]

sub and port back is generally the loudest unless u face forward and seal off another good option is sub forward port to side firing off the quarter panel

 

[AxT4430 10+ year member]

sub and port back is generally the loudest unless u face forward and seal off another good option is sub forward port to side firing off the quarter panel

Maybe im confused, but how it an advantage to fire off into the quarter panel, in the trunk? Anyhow., box and sub are in car already. Its an l port box, so if i flip it around, without sealing it, will it be advantageous? If i do this, do i have to worry about back pressure if seats up? Granted box is back away from

Seat so excursion will not hit seat.

 

[NASTY08IMPALA 5,000+ posts]

what u want in a trunk is something for the sound waves to load off of like the trunk lid or quarter panel so the sound wave has time to develop.. i turned my box around without sealing and it sounded like azz and was less output when firing to the rear...while sealing completely off works i dont like the sound personally

 

[AxT4430 10+ year member]

what u want in a trunk is something for the sound waves to load off of like the trunk lid or quarter panel so the sound wave has time to develop.. i turned my box around without sealing and it sounded like azz and was less output when firing to the rear...while sealing completely off works i dont like the sound personally

Wait.. why would non sealing have a much different effect then sealing off trunk? Both arent loading, and theoretically wouldnt as much output escape the trunk with a non sealed then a sealed? Atleast roughly equivalent?

****, im gunna have to move my large as box to test this..

 

[NASTY08IMPALA 5,000+ posts]

no lol u need time for the wave to develop ..not sealing n sealing is big deal ..and if ur subs and port r back u r loading off the trunk

 

[NASTY08IMPALA 5,000+ posts]

if u face subs forward without sealing sound wraps around the box causing cancellation thats why u seal to keep all sound in the cabin

 

[Flatbush Boi 10+ year member]

when i had a ported enclosure it was louder when facing rear. when i had it facing forward it was a little quieter, but it bumped on the backseat more

 

[mlstrass 5,000+ posts]

OP it's as simple as trying it both ways and letting your ears decide. Try forward sealed off with some pillows/blankets or whatever. Also try it forward not sealed off. Even though in theory if forward firing and not sealed off you should have issues, but the loudest trunk cars fire forward and don't seal it off. And some of them open their trunk during the run...