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miker
05-01-2008, 06:31 PM
Alright.. What are ways to increase SPL in a trunk car..

Like.. Is it good to seal off the trunk? or decrease the layers between the trunk and car as much as possible?..

Like nothing like buying a new amp or building a new box..

moorezy
05-01-2008, 10:21 PM
To state the obvious. fold down seats if you can, or remove them completely; then have subs facing in toward cabin. Facing subs in toward cabin may not work for all cars. My seats don't go down in my car... Having your rear deck free may also help ( no 6x9s or whatever speakers are there ) this will allow more air to come through to the cabin. Deadening the trunk well will also help.

RAM_Designs
05-01-2008, 10:23 PM
take back seat out, aim towards cabin, tune high, get results.

HungNeckTight
05-01-2008, 10:26 PM
when no one is in mycar i keep the seats folded down. im trying to get the most out of my one 12. and with my seats down my friends say it hits harder then there systems. just tuck everything away so a walker by cant see anything. my sub box is in a cardboard box so it looks like i have a cardboard box in my trunk.

morgans432
05-01-2008, 10:27 PM
when no one is in mycar i keep the seats folded down. im trying to get the most out of my one 12. and with my seats down my friends say it hits harder then there systems. just tuck everything away so a walker by cant see anything. my sub box is in a cardboard box so it looks like i have a cardboard box in my trunk.

bet that looks really good

brtnboarder3241
05-01-2008, 10:29 PM
when no one is in mycar i keep the seats folded down. im trying to get the most out of my one 12. and with my seats down my friends say it hits harder then there systems. just tuck everything away so a walker by cant see anything. my sub box is in a cardboard box so it looks like i have a cardboard box in my trunk.

feg



anywayz its going to be hard as **** to get loud thats how it is for me, goodluck.

miker
05-01-2008, 10:31 PM
Alright, so right now I have the center seat out, and thats as much as I can do there, and I have the rear speakers out, and the holes are being left unplugged.

So that should help it? and you say port into the cabin? I could try spinning my box again, b/c when it was porting into the cabin everything was ****ed up (RCA's in wrong spots.. lol) so that probably why it was so weak..

brtnboarder3241
05-01-2008, 10:32 PM
what car is it btw?

miker
05-01-2008, 10:34 PM
feg



anywayz its going to be hard as **** to get loud thats how it is for me, goodluck.


Yeah.. I ahve a type R on 1000w, and it's just not really doing it for me.. I mean it gets fairly loud, but.. More is better..

I have it in a 2.5cf box with two 4" Aero ports. tuned at 33hz. But the music I play is mostly low notes.. So lower tuning is better.

I thin I made the tittle misleading/ wrong..:crap:


EDIT: 89' BMW 325ix.

EDIT2: 12" woofer BTW.. No money to change equipment either. Possibly a second battery but thats all.

btdickey99
05-01-2008, 10:36 PM
so facing the sub/ port into the cabin without sealing it off from the trunk (in most cases depending on vehicle of course) will have better results than sub/port back?

btdickey99
05-01-2008, 10:36 PM
Yeah.. I ahve a type R on 1000w, and it's just not really doing it for me.. I mean it gets fairly loud, but.. More is better..

I have it in a 2.5cf box with two 4" Aero ports. tuned at 33hz. But the music I play is mostly low notes.. So lower tuning is better.

I thin I made the tittle misleading/ wrong..:crap:


EDIT: 89' BMW 325ix.

EDIT2: 12" woofer BTW.. No money to change equipment either. Possibly a second battery but thats all.

what amp?

peas247
05-01-2008, 10:37 PM
my trunk is loudest sub up port back seats folded down

HungNeckTight
05-01-2008, 10:37 PM
bet that looks really good

actually it looks fine. ill pot a pic over the weekend. when i get back to my car.

IDSkoT
05-01-2008, 11:42 PM
What does the 'x' stand for? [In your car's name]

btdickey99
05-01-2008, 11:44 PM
so once again....any experience with gaining by facing sub and port into the cabin without sealing it off?

I plan to test @ with it next week I just wanted to know

wErd
05-01-2008, 11:46 PM
What does the 'x' stand for? [In your car's name]

awd

IDSkoT
05-01-2008, 11:48 PM
awd


Thanks.


And tell me how that goes btdickey99

btdickey99
05-01-2008, 11:50 PM
Thanks.


And tell me how that goes btdickey99

I will ;)

I will be using a local shops meter(not a TL) to find out what meters best and then post some results

Lakota
05-03-2008, 06:37 PM
I know that this thread is a couple days old, but this is how you do it http://www.caraudio.com/forum/showthread.php?t=300887&page=4

btdickey99
05-03-2008, 06:39 PM
I know that this thread is a couple days old, but this is how you do it http://www.caraudio.com/forum/showthread.php?t=300887&page=4

I am actually very glad you did this..... I have thought of this thread a couple times since it died wondering why it did, and what gets best results....thanks

miker
05-03-2008, 06:41 PM
I know that this thread is a couple days old, but this is how you do it http://www.caraudio.com/forum/showthread.php?t=300887&page=4

Thats very similar to what I have right now


I have a PA3000d. rated 1300w at 2ohm.. So I'm assuming I'm getting a good 1000w out of it.. It's not a terrible amp.


I'm thinking I need another batter and some good wiring, my 4g is more like 5g.. if there is even a such thing. The point is that the insulation is 4g but the wire is not.

Lakota
05-03-2008, 06:43 PM
I am actually very glad you did this..... I have thought of this thread a couple times since it died wondering why it did, and what gets best results....thanks

I did a similar design in a Grand Am, with a 15" L5 and a 1500.1 and it was doing 148's in the kick with zero testing. I'm sure that I could have gotten it to do a 150if I tried. It was about 3.5ish cubes and had 3 4" aeros.

btdickey99
05-03-2008, 06:45 PM
I did a similar design in a Grand Am, with a 15" L5 and a 1500.1 and it was doing 148's in the kick with zero testing. I'm sure that I could have gotten it to do a 150if I tried. It was about 3.5ish cubes and had 3 4" aeros.

wow.....I wish I could do those type of #s...:crap:....I guess its back to the drawing board for the next build

any experience at all with sub and port into the cabin w/out sealing it off?

Lakota
05-03-2008, 06:50 PM
wow.....I wish I could do those type of #s...:crap:....I guess its back to the drawing board for the next build

any experience at all with sub and port into the cabin w/out sealing it off?

You can do similar #'s pretty easily. I didn't even try on that build because it wasn't mine. Just follow the advice of those that have done good #'s.

I haven't messed with that because I don't have a trunk.

btdickey99
05-03-2008, 07:46 PM
You can do similar #'s pretty easily. I didn't even try on that build because it wasn't mine. Just follow the advice of those that have done good #'s.

I haven't messed with that because I don't have a trunk.

Yea it looks like I need to do a box with some aero's in it....time to pick some up

Big Nev
05-03-2008, 09:58 PM
most of the boxes i build for Texas Bass Productions Trunk class go woofers and port into the cab sealed off from trunk. most guys doing 51 on 1 12 and 53-54's 2 15's 2-3000 watts, and the all gained .5 or better with the trunk open. termlab in the kicks

miker
05-07-2008, 08:27 PM
Alright.. I can't post numbers, but I just turned my port so it's in the cabin..

I'll post if I get better results or not.. It better be just as loud if not louder because I would hate to take everything apart again..

profundus-sanus
05-07-2008, 08:48 PM
you could build a series tuned sixth order bandpass w/ the port firing into the cabin..

btdickey99
05-07-2008, 08:50 PM
Alright.. I can't post numbers, but I just turned my port so it's in the cabin..

I'll post if I get better results or not.. It better be just as loud if not louder because I would hate to take everything apart again..

louder of what?

basshedz06
05-08-2008, 05:58 PM
it really depends on your car man u can i have a trunk car and i tried the facing forward bit and only did a 138 on my first run an when i turned the box around did a 140 with 1200 watts. built another box port back about 3 inches from the trunk lid and subs up and did a 142 not even with gains up high, so it just depends on your car. trunks are hard to get loud but the ride to getting them loud is fun and u will learn a lot while doing it trust me. i know a guy who is down 154 to 156 out of a trunk with about 3200 watts and he has promised to only get louder so u have to work at it man and ask, ask , and ask a lot of questions cause some of these guys can be helpful.

supadave

miker
05-08-2008, 06:02 PM
Well... I'm not sure..

It kinda sounds more like a big pfshhhhhhhhht. Sounds more like a fart facing forward.

I'm going to have to listen to it more tomorrow, I only listened to it LOUD for about 30sec today haha.. I hate driving around town with it loud..

Pop da Hatch
05-10-2008, 06:50 PM
:needpics:

miker
05-10-2008, 06:52 PM
Well I switched it back. Sounded like **** porting into the cab, and was not as loud.

Kenneth10483
05-10-2008, 07:06 PM
Subs up port to the back or subs up port to the side

btdickey99
05-21-2008, 02:41 AM
ok I know this thread has died but thought I would post my results as I promised I would....

using a local shops mic I did some testing... not full volume but high

sub/port back.....146.5

Sub/port facing into car(not sealed off)- 147.1

box sideways/port/sun sideways facing driver side 148.6

DBDRAGGUY
05-21-2008, 02:45 AM
ok I know this thread has died but thought I would post my results as I promised I would....

using a local shops mic I did some testing... not full volume but high

sub/port back.....146.5

Sub/port facing into car(not sealed off)- 147.1

box sideways/port/sun sideways facing driver side 148.6

Nice, thanks for posting.

btdickey99
05-21-2008, 02:46 AM
Nice, thanks for posting.

I think I may try the design lakota posted, or facing into the cabin sealed off from trunk...havent made my mind up yet

jag09
05-21-2008, 07:16 PM
btdickey99 do you have a ski-port in your car?
i have one in mine and am thinking of ethier having the port or the sub and at opening in the backseat

miker
05-21-2008, 07:27 PM
your numbers make sense.. From my personal experiences too.. (I mean mine are just by ear, but you can deffinatly tell)

Thanks for posting :)

So..

sub up port to the side for trunk cars???

Hydrastas
05-22-2008, 01:29 AM
ok I know this thread has died but thought I would post my results as I promised I would....

using a local shops mic I did some testing... not full volume but high

sub/port back.....146.5

Sub/port facing into car(not sealed off)- 147.1

box sideways/port/sun sideways facing driver side 148.6

so the loudest was when you turned the box sideways and the sub and port both faced the driver side?

Hydrastas
05-22-2008, 01:33 AM
with this current setup the only way i can get it as loud as i'd like is to have the trunk open and the driver side door open. just seems hard to cruise down the road like that so im lookin for alternatives lol.

http://i200.photobucket.com/albums/aa46/hydrastas/SANY0833.jpg

i can position my box 3-4 more inches from the trunk lid if need be. would the port be lacking air being this close or something? which would explain the trunk being open and it being louder?

btdickey99
05-22-2008, 01:37 AM
so the loudest was when you turned the box sideways and the sub and port both faced the driver side?

yes...night and day difference

Hydrastas
05-22-2008, 01:40 AM
yes...night and day difference

alright, this gives me reason to get the amp off the box as well, i screwed that thing down with 8 screws and it still rattled like a *****. prob not good for it's internals anyway lol

btdickey99
05-22-2008, 01:41 AM
you just need a new box.....

andwhat worked in my car may be different for other cars

ContourSPL
05-22-2008, 08:31 AM
http://i95.photobucket.com/albums/l125/contourSPL/S5001688.jpg
http://i95.photobucket.com/albums/l125/contourSPL/S5001686.jpg
http://i95.photobucket.com/albums/l125/contourSPL/S5001697.jpg
http://i95.photobucket.com/albums/l125/contourSPL/S5001685.jpg

Should have used two 6" ports instead but you get the idea

JEXTEL
05-22-2008, 01:27 PM
ok I know this thread has died but thought I would post my results as I promised I would....

using a local shops mic I did some testing... not full volume but high

sub/port back.....146.5

Sub/port facing into car(not sealed off)- 147.1

box sideways/port/sun sideways facing driver side 148.6

you did these numbers with the stuff in your sig? and on the TL?