Two 8 subs vs one 10 or 12

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awd_sr

Copper - Posts: 84

Joined: June 04, 2002

Location: United States

Posted: June 25, 2002 at 8:37 PM / IP Logged

as thrifty as I am....i got this 12" box from my neighbor. He used to have a JL in there, not sure what model. I'm thinking of puttting a nice 12" sub in there. I'm gonna figure out the volume of the box based on the dimensions and then post em here, maybe you kind folks can help me make a better decision on a sub???

Right now I'm using an MTX Thunder 280 bridged into 4 ohms which gives me 160Watts RMS at 12.5 Volts. This seems to be enough power for my liking, so what sub will best suit this setup (box and amp)

Here are pics of the box:

https://images.cardomain.com/installs/216000-216999/216903_19_full.jpg

https://images.cardomain.com/installs/216000-216999/216903_20_full.jpg

and if u want to check out my whole car, heres the link

http://www.cardomain.com/member_pages/view_page.pl?page_id=216903&page=3

thanks again for the help!

awd_sr

Copper - Posts: 84

Joined: June 04, 2002

Location: United States

Posted: June 25, 2002 at 8:46 PM / IP Logged

btw, GlassWolf, I checked out your site, cool stuff my man!

I heard a guy at work talk about someone putting their PC inside of a keg...

GlassWolf

Copper - Posts: 365

Joined: June 22, 2002

Location: South Carolina, United States

Posted: June 26, 2002 at 6:19 PM / IP Logged

if that box you're using is sealed, you should be okay as sealed enclosure size is fairly by the book per sub diameter.

If the enclosure is ported, you really need to calculate the proper port diameter(s) and length(s) for the sub to work in a proper manner in that enclosure.

and thanks

PS, based on the whacky angles used in that box, it may be easiest, for calculating volume, to look at the box from the side, and draw an imaginary line from one corner to the opposing corner, changing the geometric shape you're measuring from a single quadrohedron into 2 triangles. Then measure the angles, and side-lengths, and using basic geometry, calculate the volume from Pythagorean therum.

If your sub is designed for a ported enclosure, using the Thiele-Small tables, and your sub's stats, you can easily calculate port lengths for that box once you have it's volume as well. Doing this, assuming the sub is made for a ported box, and the box is now sealed, you can add one, or two (even 4) 4"ID ports cut to measure.

that part is very easy. I just used to use plastic plumbing pipe. very sturdy, and easy dremeled to round the edges to avoid port-whistling.

-GlassWolf

Pioneer Stage-4, Orion, DynAudio, Fi

GlassWolf

Copper - Posts: 365

Joined: June 22, 2002

Location: South Carolina, United States

Posted: June 26, 2002 at 6:21 PM / IP Logged

hahaha cardomain

man I just went through all 225 Grand Cherokees there the other night LOL!

there are a lot of sweet Jeeps there. I thought about posting pics of mine from my site there once I get the air induction installed (it's being built right now to order) and tint the front windows.

Also playing with the idea of flush-mounting the amps under the rear seats for show.

-GlassWolf

Pioneer Stage-4, Orion, DynAudio, Fi

awd_sr

Copper - Posts: 84

Joined: June 04, 2002

Location: United States

Posted: June 26, 2002 at 7:40 PM / IP Logged

i just "threw" my sub amp under the back seat of my Cherokee, should I "throw" a fan under there too so it wont get too hot?

pervitizm

Copper - Posts: 125

Joined: April 16, 2002

Location: United States

Posted: June 28, 2002 at 12:26 AM / IP Logged

Hey Subsonic,

I just wanted to let you know that I used your ID number today to purchase something off of crutchfield. I hope that this is okay with you.

pervy

live & die 4 tha luv of BASS!!!!

GlassWolf

Copper - Posts: 365

Joined: June 22, 2002

Location: South Carolina, United States

Posted: June 28, 2002 at 3:10 AM / IP Logged

The Cherokee/Grand Cherokee has a TON of space under those back seats. Heat issues really depend on the amp. if it's not flush-mounted in a board of some type you should be okay.

I was actually just considering flush-mounting my 3401 parametirc EQ, PPI PCX-440, and Orion 2150SX under that rear bench myself, and probably doing the flush-board in fleckstone to match the gray interior. Figured that'd look nice.. maybe with a clear plexi window over the parametric.

just something to kill some time I guess LOL

-GlassWolf

Pioneer Stage-4, Orion, DynAudio, Fi

awd_sr

Copper - Posts: 84

Joined: June 04, 2002

Location: United States

Posted: June 28, 2002 at 5:52 AM / IP Logged

yeah, that would be tight. I was thinking of doing something similar, but using gray vinyl to cover the board. The plexiglass is the cherry on top! Then, through a neon light under there...well, how often are u gonna lift that seat???

Let me know how that goes.

Tony

pervitizm

Copper - Posts: 125

Joined: April 16, 2002

Location: United States

Posted: June 28, 2002 at 8:05 PM / IP Logged

subsonic,

thanks alot! i was able to save 25 dollars off of my order at crutchfield. you are da man!

pervy

live & die 4 tha luv of BASS!!!!

GlassWolf

Copper - Posts: 365

Joined: June 22, 2002

Location: South Carolina, United States

Posted: June 29, 2002 at 12:47 AM / IP Logged

I'd lift it as often as I could to show it off!! hahaha

actually I like the idea under the rear bench to keep it hidden. Only comes out when I have friends here or at shows.

If I trick out the jeep any further, and ditch the bass tube I'll probably drop my Lestech alternator in it, re-run it all with 4ga. power, and do the fleckstone board under the seats for a 4-channel amp for mids/highs, the alpine 3401 parametric for a tuning EQ, and the trusty old Orion 2150SX for the subs, which will go back to my old, faithful Cerwin Vega 12" DVC LE12D subs. fantastic sensitivity with treated paper cones.. and they can hit really hard.

I just need to decide on a box type now.. thinking small and removable, so maybe a clam-shell isobarik box, in a vented push-pull configuration, again fleckstone coated.. and thinking a slot-vent this time instead of a tube port.

heh too much time to play I guess LOL

-GlassWolf

Pioneer Stage-4, Orion, DynAudio, Fi

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