SQcomps install

[talnlnky]

hey, here's the thread I told you I'd start...

keep in mind...
these are single 12's on this graph, 750rms

once you put these boxes in a car, you'll have cabin gain in the sub 40hz range... especially in the sub 30hz range.

the group delay matters most above 30hz, once you get below 30hz, it really don't matter

the ported box would have a big long port (see it)... but that would be needed in order to ensure there would be no port noise at high volumes (which would kill your score in the lanes).

[Alien Mantis]

Strange graph readings.

I would expect to see an amplitude peak around 3 db's higher on that ported box line, around the 40-50hz region.

Every single graph I have ever seen, shows a FLAT curve for a sealed box, with a drop-off starting around 50hz, and a slightly higher peak in db just above the tuning frequency for a ported enclosure.

And why would anyone ever want to run a GIANT over-sized SEALED box ???

Why not save space and just do a ported box?

[talnlnky]

Originally Posted by Alien Mantis

Strange graph readings.

I would expect to see an amplitude peak around 3 db's higher on that ported box line, around the 40-50hz region.

Every single graph I have ever seen, shows a FLAT curve for a sealed box, with a drop-off starting around 50hz, and a slightly higher peak in db just above the tuning frequency for a ported enclosure.

And why would anyone ever want to run a GIANT over-sized SEALED box ???

Why not save space and just do a ported box?

and Infinite Baffle install is pretty much a giant sealed box. To mimic an IB install using a sealed box you only have to have a box 4 times greater than the vas of the sub.

that isn't an amplitude chart per say, it doesn't show how loud it'll be, only how quickly it'll roll off.

the reason why it doesn't look like the ported box is a lot louder is because it is a small size ported box considering how low it is tuned... That is an extremely low tuning for a car.


I'm trying to convince sqcomp to do something a bit more radical, yet easy on his install... I'd like to see dual 15's IB in his trunk.

[sqcomp]

No more advice

[Alien Mantis]

Originally Posted by sqcomp

AM -- Save space on that vented enclosure? That single enclosure is almost 3 cubes.

Design #3 is a 5 cf sealed box.

That is what I was referring to.

[talnlnky]

Sqcomp, if you start using membranes.... you will lose your 20-40hz octave... at least a good amount of it.

[bzinn 1]

Wow I am glad I opened this thread,I just picked up a IDQ 12" for $50 from a buddy and it looks like it will work well in the small car,keep us posted on the boxs you chose,I need some ideas on what will work still.

[sqcomp]

*

[_S7V7N_]

Dude that spare tire needs to be relocated..Lolll i see lots of potential under there for a nice lil amp rack setup. Imma see if that sucker can be moved to under the car, kinda like how trucks are.

Yo do you think a set of 3.5's with a Mounting depth of 1.5 will fit in them c-pillars ?

[swidd]

Wow, I just put lots of deadening and used a closed cell foam mattress to stuff into the open spaces in the rear hatchback wheel well area, and the difference in road noise is considerable already! Its like the noise picture shifted to dead silence from the back of the car, and noise coming only from the front, engine and doors.

This was easier than I feared! Just rip those panels off, clean up the dust, rip out the old speaker, lay down mat, fill up with foam, slap the panel back on, wipe off the fingerprints and test drive. Like 40 minutes per side.

I am so kicking myself for not doing this sooner! I've been so annoyed with the noise in the Yaris.

[derickveliz2]

Not much only:

05/23/10 12:00 1 IMPORT FACE OFF EPPING NH

All ready in my calendar.

[talnlnky]

Originally Posted by derickveliz2

Not much only:

05/23/10 12:00 1 IMPORT FACE OFF EPPING NH

All ready in my calendar.

it's barely march... most shows for autosound happen in the summer... come april/may you should start to see stuff popping up... I remember the virginia area being pretty big when it came to shows... A few years back I wanted to Join IASCA, but they didn't have a single show in WA, so I didn't... joined dB Drags instead.... then found out there was only like 3 sanctioned shows that year in the state.... So I lost faith in the whole thing... THEN I MET the guy who runs/owns dB Drags.... the tool lived literally 15 minutes away from me. I think he purposely felt the need for there to be no autosound comp scene where he lived... otherwise his work would always be around him.... Ok maybe not... but really... its like if God live not in heaven, but rather in hell.... doesn't make sense... make some improvements dangit!

[_S7V7N_]

Texas is the place to be for IASCA and USACI, they damn near have a show every other weekend. Here in Florida there's quite a few shows, but they're more towards ricers, the big one that comes here to Orlando is Hot Import Nights. That is one Hot show, No lie.

[The Architect]

pics of crimper bc i dont believe it.

[derickveliz2]

.

I need more friends... (o:

D.

[derickveliz2]

Love it!

What are you going to paint? I'm a little sleepy and didn't get that part.

[goku87]

4) Why paint it? you should wrap it in CF.
5) Would there have been enough room for a scanguage to fit in that bottom section?

[derickveliz2]

I have a question that comes to my mind because of my lack of knowledge...

You are going to have two 15" subs in the trunk, two 8" (mid-base) on the kick panel, two 4" or so mids up front near the pillars with two Tweeters, right?

and 3 amps! how are you going to connect all of them, my set up for example lets me to have Woofers, Mids, and Tweeters. But when I try to add one more drive, my equation goes no where )o: and here is the question: "At what point you divide in 2 one signal? or how it's done"?

sorry it might be a very naive question, but I would like to add a couple of 4 inch speakers to my system but I don't know where this extra channel comes out and still have control.

Thanks.

D.