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View Full Version : whats is a better design? 6-8 DD1508's trunk'd



PioneerSPL1990
12-30-2009, 12:10 PM
i have a friend that just purchased a few DD 1508's and he wants me to build a nasty enclosure for the trunk. he planning on running a 5K amp, probably sound digital, and 4 kinetik HC 1800's, or 2 2400's. trunk to cab opening is 15" high x 36w. the highest that can be in the trunk is 15" becouse if the lid lifters.

heres a couple designs, which one should i shoot for?

http://photos-d.ak.fbcdn.net/hphotos-ak-snc3/hs187.snc3/19452_225806216171_550891171_3309528_6383682_n.jpg

djman37
12-30-2009, 12:13 PM
does he have 6 or 16 subs?

Canaan
12-30-2009, 12:14 PM
What car is this?

If the seats fold, sub and port forward...subs passenger side, port drivers.

PioneerSPL1990
12-30-2009, 12:18 PM
What car is this?

If the seats fold, sub and port forward...subs passenger side, port drivers.

that was the plan anyway




he has 6 on order currently but can pick 2 more up. its a 2002 olds alero 4 banger.

Mookie
12-30-2009, 12:22 PM
Design #2

PioneerSPL1990
12-30-2009, 12:25 PM
Design #2

good thats the one i wanted to go with, i have room for the big *** port, so the box can be a bit smaller and i can fit the batteries and amp.

mbrooky
12-30-2009, 12:29 PM
how would these sound in a fourth order? or sixth order side clam...nvm..probably don't have the room with that many of them

Mookie
12-30-2009, 12:32 PM
IIRC I dont think they do very well in 4th and 6th order, But I might be thinking of a different driver.

PioneerSPL1990
12-30-2009, 12:38 PM
how would these sound in a fourth order? or sixth order side clam...nvm..probably don't have the room with that many of them

i screwed up the first design theres only supposed to be 4 a side.

PioneerSPL1990
12-30-2009, 12:40 PM
my goal is to break a 150 with his car. im thinking im going to have to have alot more than 5K though, we wont be building this until after tax time the weather is too crappy/cold here.

mbrooky
12-30-2009, 12:54 PM
yeah i've read to give about 1k each...i have two of them and contemplating on doing a fourth order to see how they do

PioneerSPL1990
12-30-2009, 12:57 PM
another delema:

he wants to be as close to 1 ohm as possible. the best thing i can figure is to get these in a D4 configuration, wire them up to 8 and parallel 3 together then series the 2 chains of 3 together to give me 1.33 ohms. or is this not possible im bad at figuring out multiple sub wiring. i guess thats whi i've always ran 1 amp per sub. lol

PioneerSPL1990
12-30-2009, 01:06 PM
no one on my question?

djman37
12-30-2009, 04:44 PM
do the coils in series and subs in parallel for your 1.33 load.

mbrooky
12-30-2009, 04:54 PM
another delema:

he wants to be as close to 1 ohm as possible. the best thing i can figure is to get these in a D4 configuration, wire them up to 8 and parallel 3 together then series the 2 chains of 3 together to give me 1.33 ohms. or is this not possible im bad at figuring out multiple sub wiring. i guess thats whi i've always ran 1 amp per sub. lol

yes and no...you would parallel them again not series to get 1.33...easier way is to wire each sub parallel to 2ohm then pair it to another in series to give you 4 ohm do that to have 3 pairs all to 4 ohm then parallel them together to get 1.33 ohm

use this:

http://www.the12volt.com/caraudio/boxcalcs.asp



do the coils in series and subs in parallel for your 1.33 load.

or what he said :p:

spltuscon
12-30-2009, 07:28 PM
Depending on the amp, most 5k amps can handle .66 which you could get from 6 of the d2's wired series/parallel. With 6 of those subs and 5k you should be able to break a 150 legal assuming the box is good. Option #2 would be my pick by far.

mbrooky
12-31-2009, 12:59 AM
yup there a few 5k amps out there that can run .5 daily so .66 should be no prob..and burp at .33...also you can wire the d4s down to .66...wire 2 subs to 1ohm and 4 subs to 2ohm then parallel them to .66....or wire them all parallel to .33 for burps :p:

PioneerSPL1990
12-31-2009, 01:23 AM
.66 daily? i was looking at sound digital but for .66 at all they seem like a bad choice what are my options in the <$900 catagory? or a pair of strong 2500W amps i can only run "5K" for the class im shooting for and 1 aux battery, i have 2 1800's but i can use up to an hc3800 so ill get one of those and a Hc1200 for the front.

the lower i can wire the amp the better, im want to see about 900-1000Wrms to each sub and im planning for 6.

spltuscon
12-31-2009, 10:32 AM
SD aren't the best amps for running low daily with. Some good choices in that range would be;
RD Audio D9 (down to .35 daily)
AB 500.1
Cactus 5k

Although any good 5k amp will probably have to be used to come in under $900. Check the classified on here, I picked up my D9 for under $800 shipped and it was BNIB.

Canaan
12-31-2009, 02:01 PM
Is your Alero a 2dr or 4dr?

We did 2 DD2510's in NickV's 4-dr, does 150.9dB w/ minimal testing in 3cuft w/ 4 4" areo's. Subs and ports forward, trunk not sealed. He has all his airbag stuff, amps, and batts behind the box. Peaks at 57hz, plug 2 ports and its very musical.



16.5t x 37w will slide right up against the seat and create a pretty good seal.
IIRC, 20d will fit in the trunk pretty easily also.

So, double baffled you have around ~5.35cuft gross to work and still have space behind the box and be able to pull it out.

Canaan
12-31-2009, 02:48 PM
If you have the 4-dr...try a box like this,

16.5"t x 37"w x 19.75"d....double baffle.
Subs on passenger side, have to stagger them a little to fit.
Do 2 threaded rods front to back between the subs.
Port on drivers side, 15"t x 6"w...Start w/ 10" deep and tweak from there.

On ~3.5k you should be able to touch 150dB+ around 57hz.

350zspl
12-31-2009, 02:52 PM
i am running 3 each dd 1508 in the hatch of my 350z off a saz 3000K at .7 ohm

gets loud and low

PioneerSPL1990
12-31-2009, 02:57 PM
If you have the 4-dr...try a box like this,

16.5"t x 37"w x 19.75"d....double baffle.
Subs on passenger side, have to stagger them a little to fit.
Do 2 threaded rods front to back between the subs.
Port on drivers side, 15"t x 6"w...Start w/ 10" deep and tweak from there.

On ~3.5k you should be able to touch 150dB+ around 57hz.

you know the max box size that fits for sure lol i finally figured that out about 2 months ago. how did u fit it through the trunk being 19.75 deep?

biggest i could get was 16.75x32x 18 (prefab) i know i could go almost 38w.


and when i had my old system in i was peaking a 58hz after we changed the port. i also found a peak at 43hz with a box tuned to 36hz.

Canaan
12-31-2009, 03:40 PM
you know the max box size that fits for sure lol i finally figured that out about 2 months ago. how did u fit it through the trunk being 19.75 deep?

biggest i could get was 16.75x32x 18 (prefab) i know i could go almost 38w.


and when i had my old system in i was peaking a 58hz after we changed the port. i also found a peak at 43hz with a box tuned to 36hz.

Just talked to NickV, he said he has to pull the plastic trim out near the trunk opening and it will drop in. My have to play w/ it a little though.

As for the 58hz peak, shoot for that. The N-bodies like about that freq. NickV's Alero has a layer of mat on the trunk lid and floor also.

PioneerSPL1990
01-01-2010, 12:03 PM
plan changed im running 6 p2s 8s and an rf 2500.1bd i can get this sooner.

Cashdollar2009
01-05-2010, 02:46 AM
Have the alero owners join aleromod(dot)com... we have a million members (slight exaggeration), but probably around 10 with something considered an aftermarket soundsystem. We need more knowledgable people in the audio department. :)

PioneerSPL1990
01-05-2010, 01:31 PM
Have the alero owners join aleromod(dot)com... we have a million members (slight exaggeration), but probably around 10 with something considered an aftermarket soundsystem. We need more knowledgable people in the audio department. :)

josh u added me on facebook. i havent been on in ages. i got on the site last night and its changed alot.

im going with 10 6" subs for starters. its going to be alot cheaper.

Johnny Law.Lulz
01-05-2010, 01:40 PM
lulz, i hope if your going with cheaper **** like that, that oyu dont expect 150's

PioneerSPL1990
01-05-2010, 01:43 PM
lulz, i hope if your going with cheaper **** like that, that oyu dont expect 150's

i don't expect that now. im going with elemental designs e3.6's.