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View Full Version : Box for 2 Obsidian 18 v2's



bgowdy31
10-20-2013, 10:23 PM
Im really needing input on the port part of the enclosure. I know what i want to tune to so im not in question of that. Im working on getting everything together for a 2 OA 18 v2 setup. Im really not sure what i should aim for as far as port goes. Im going with aero's to save on space.

What size port would be ideal for this. The build will be geared for a daily/SPL setup for the org i compete in from time to time which is on a "music average" no burps.

My Dimensions that ive got gives my 10.01 cubes net before disp.

Im stuck between 2 8's or 1 10" port. i was thinking 1 10" when i was first getting into measuring but then i was told that i would want alittle more and suggested i do 2 8's.

Any input?

FamousMassacre
10-20-2013, 10:39 PM
Im really needing input on the port part of the enclosure. I know what i want to tune to so im not in question of that. Im working on getting everything together for a 2 OA 18 v2 setup. Im really not sure what i should aim for as far as port goes. Im going with aero's to save on space.

What size port would be ideal for this. The build will be geared for a daily/SPL setup for the org i compete in from time to time which is on a "music average" no burps.

My Dimensions that ive got gives my 10.01 cubes net before disp.

Im stuck between 2 8's or 1 10" port. i was thinking 1 10" when i was first getting into measuring but then i was told that i would want alittle more and suggested i do 2 8's.

Any input?

Where do you want to tune?

FamousMassacre
10-20-2013, 10:44 PM
I would go with the 2 8"s.

hispls
10-20-2013, 10:50 PM
You'd get more output out of a good pair of 15's in that little space. 10 cube before displacement is about right for one 18 with proper port, bracing and the displacement of the driver.

I've had better luck getting loud out of one port rather than multiples.

FamousMassacre
10-20-2013, 10:58 PM
You'd get more output out of a good pair of 15's in that little space. 10 cube before displacement is about right for one 18 with proper port, bracing and the displacement of the driver.

I've had better luck getting loud out of one port rather than multiples.
He's only getting like 8.5" with the 1 10" as opposed to 11" with 2 18"s. I'm assuming he's not running a crazy amount of power so 11" would be better in his situation.

I know someone running 2 12"s in 5.5cf box. I think he'll do okay with 4.6 each, just needs a bit more power to move them.

bgowdy31
10-20-2013, 11:03 PM
You'd get more output out of a good pair of 15's in that little space. 10 cube before displacement is about right for one 18 with proper port, bracing and the displacement of the driver.

I've had better luck getting loud out of one port rather than multiples.

im not trying to argue with your suggestion, ive just read, been told, and seen vids with small enclosures for these. also Buck; said hes seen a guy(s) running 2 in 3.7 cubes net per and it did well. just lacked on the lower end which i tune around 40hz for my taste in music. i usually dont listen to nothing below like 36-37hz anyway.

bgowdy31
10-20-2013, 11:14 PM
He's only getting like 8.5" with the 1 10" as opposed to 11" with 2 18"s. I'm assuming he's not running a crazy amount of power so 11" would be better in his situation.

I know someone running 2 12"s in 5.5cf box. I think he'll do okay with 4.6 each, just needs a bit more power to move them.

I usually tune around 38-40hz(my taste in music, i know its different from most lol) because it gives me a good mix between daily & spl. No im not throwing and ungodly amount of power, probably around 3k or so before rise and voltage drop because i dont want to just kill the subs lol. but yea buck said 2 8's would probly work alot better 1 10" then someone suggested that the 1 10" would be good for them so im unsure lol

hispls
10-21-2013, 09:08 AM
im not trying to argue with your suggestion, ive just read, been told, and seen vids with small enclosures for these. also Buck; said hes seen a guy(s) running 2 in 3.7 cubes net per and it did well. just lacked on the lower end which i tune around 40hz for my taste in music. i usually dont listen to nothing below like 36-37hz anyway.

Whatever you say. Certainly they will function in 4 cube, but all the testing I've done suggests that smaller woofers in adequate volume get louder and the difference in just jamming another woofer in a box that's only really big enough for one driver will be only a couple tenths.

NASTY08IMPALA
10-21-2013, 09:21 AM
I think 2 15s im that size box with a single 10" aero will be alot better than the 18s overall...esp on low power ..just droppin my .02cents

FamousMassacre
10-21-2013, 02:11 PM
I usually tune around 38-40hz(my taste in music, i know its different from most lol) because it gives me a good mix between daily & spl. No im not throwing and ungodly amount of power, probably around 3k or so before rise and voltage drop because i dont want to just kill the subs lol. but yea buck said 2 8's would probly work alot better 1 10" then someone suggested that the 1 10" would be good for them so im unsure lol

3k is wayyyyy too much for Obsidian Audio subs. 1k each max

jrdnhsnbrg
10-21-2013, 02:19 PM
Why not 3 15's?

bgowdy31
10-21-2013, 04:08 PM
3k is wayyyyy too much for Obsidian Audio subs. 1k each max

that would be before rise and voltage drop. they wont be seeing 3k

black05alti
10-21-2013, 04:11 PM
I'd probably go with the 2 8" ports

bgowdy31
10-21-2013, 04:16 PM
Whatever you say. Certainly they will function in 4 cube, but all the testing I've done suggests that smaller woofers in adequate volume get louder and the difference in just jamming another woofer in a box that's only really big enough for one driver will be only a couple tenths.

ok i understand where you coming from, now my question why would i need to put 1 18" sub in a 9 cube enclosure? hdc3 18s like larger boxes and i ran mine in a 5.40 cube net enclosure and it did fine. if each of these subs require such a big enclosure why does OA website say 4.5 - 6 cubes ported? i see guys running DCs all the time in 4 cube net enclosures

bgowdy31
10-21-2013, 04:17 PM
Why not 3 15's?

a 3 15 box would be bigger then 2 18 box.

bgowdy31
10-21-2013, 04:23 PM
I think 2 15s im that size box with a single 10" aero will be alot better than the 18s overall...esp on low power ..just droppin my .02cents

ok so whats the point in obsidian even listing box specs on their website.

dbeez
10-21-2013, 04:29 PM
Honestly the subs will work in any box you install them how they sound and perform is a whole other ball game so take that for what its worth.

bgowdy31
10-21-2013, 04:45 PM
Honestly the subs will work in any box you install them how they sound and perform is a whole other ball game so take that for what its worth.

ok so why didnt anyone else say this then? i wasnt trying to argue anyone. I really want to run 18s, ive done 10s 12s(<numerous times) 15s(<numerous times).

What would be the smallest that you would give these per sub. Im not really a SQ guy honestly, as long as it sounds "ok" then im good. I mean i dont tune for lows or nothing, im still keeping it around 40hz to keep a good mix of daily & spl.

dbeez
10-21-2013, 09:19 PM
ok so why didnt anyone else say this then? i wasnt trying to argue anyone. I really want to run 18s, ive done 10s 12s(<numerous times) 15s(<numerous times).

What would be the smallest that you would give these per sub. Im not really a SQ guy honestly, as long as it sounds "ok" then im good. I mean i dont tune for lows or nothing, im still keeping it around 40hz to keep a good mix of daily & spl.

As I said previously what you have available before displacements is what you actually need after all displacements.

bgowdy31
10-21-2013, 10:00 PM
As I said previously what you have available before displacements is what you actually need after all displacements.

yea im working on the space issue. im measuring to figure the distance from the ports to the hatch

dbeez
10-22-2013, 08:46 AM
Need to keep box as low as possible I dont see you gaining anything nottrying to be negative nancy but the box the 2-15's were in was horrible you have ran many setups I havent seen any that were done well enough to get you the goals your after.

BoomBoxStereo
10-22-2013, 08:54 AM
i have two obsidian 15's inverted in 6.8 cubes of airspace. 10" aero tuned to 31. they definitely like it... i wish i built the box a cube larger though. either that or a slightly smaller aero

Popwarhomie
10-22-2013, 09:08 AM
I run a 12" aero with my 2 18s. Sonotube.

bgowdy31
10-22-2013, 04:11 PM
I run a 12" aero with my 2 18s. Sonotube.

**** how big is you box.....

bgowdy31
10-22-2013, 04:56 PM
Need to keep box as low as possible I dont see you gaining anything nottrying to be negative nancy but the box the 2-15's were in was horrible you have ran many setups I havent seen any that were done well enough to get you the goals your after.

That box was bad because it was pre built, it was kind of narrow length wise and like 25 inches tall.

For this i would extend the length out and try to keep the height as low as is can.

bgowdy31
10-22-2013, 05:05 PM
i have two obsidian 15's inverted in 6.8 cubes of airspace. 10" aero tuned to 31. they definitely like it... i wish i built the box a cube larger though. either that or a slightly smaller aero

See with my space, im still trying figure out what i can do. but anyway with the current dimensions after displacement subs, port & brace. im at roughly 9 cubes. so thats 4.5 per sub. I dont see why that wouldnt work. in your case you have 3.4 per sub and you said they like. im going to be running about 1k to mine as well, should be able to get away with tad bit more power seeing my box is on the smaller side. but i want about 1k each.

Popwarhomie
10-22-2013, 05:20 PM
**** how big is you box.....

12 cubes net. Standard 18" size.


Awww. I gotz dislike :laugh:

bgowdy31
10-22-2013, 05:33 PM
12 cubes net. Standard 18" size.


Awww. I gotz dislike :laugh:

lol... thats what im making the 8s out of but they will be fiberglasseand flared

---------- Post added at 05:33 PM ---------- Previous post was at 05:32 PM ----------


12 cubes net. Standard 18" size.


Awww. I gotz dislike :laugh:

how much power are you putting to them

BoomBoxStereo
10-22-2013, 08:08 PM
See with my space, im still trying figure out what i can do. but anyway with the current dimensions after displacement subs, port & brace. im at roughly 9 cubes. so thats 4.5 per sub. I dont see why that wouldnt work. in your case you have 3.4 per sub and you said they like. im going to be running about 1k to mine as well, should be able to get away with tad bit more power seeing my box is on the smaller side. but i want about 1k each.

More than likely. I'm pushing 2.5k to mine and they like it

Timmy13091
10-22-2013, 08:14 PM
3k is wayyyyy too much for Obsidian Audio subs. 1k each max

You should tell that 2 the mojo 4k I pushed my 2 oa v2s with lmao

bgowdy31
10-22-2013, 08:55 PM
You should tell that 2 the mojo 4k I pushed my 2 oa v2s with lmao

My Mojo :naughty:

Timmy13091
10-22-2013, 09:22 PM
My Mojo :naughty:

Yes it was :fro:

hispls
10-23-2013, 02:43 AM
why does OA website say 4.5 - 6 cubes ported? i see guys running DCs all the time in 4 cube net enclosures

Because some people just insist on having a lot of cone area regardless of performance or proper enclosure. The company that makes the most ridiculous claim about how small you can put an 18" driver into will sell more 18's.

Silverado SS
10-23-2013, 02:59 AM
ok so why didnt anyone else say this then? i wasnt trying to argue anyone. I really want to run 18s, ive done 10s 12s(<numerous times) 15s(<numerous times).

What would be the smallest that you would give these per sub. Im not really a SQ guy honestly, as long as it sounds "ok" then im good. I mean i dont tune for lows or nothing, im still keeping it around 40hz to keep a good mix of daily & spl.

I told you twice when we were PMing back and forth to run 15s bud

bgowdy31
10-23-2013, 03:15 PM
Because some people just insist on having a lot of cone area regardless of performance or proper enclosure. The company that makes the most ridiculous claim about how small you can put an 18" driver into will sell more 18's.

I see. i wouldnt figure that DC xl 18s could work well in 4 cubes per but my friend/teammate has 4 xl 18s and after all disp they have 4 cubes each and it sounds good and is loud on "Real Time Music Ave" on Termlab.

bgowdy31
10-23-2013, 03:26 PM
I told you twice when we were PMing back and forth to run 15s bud

i know. ive actually restructured my hatch to allow more space im really close to or right at 5 cubes per after displacement

Buck
10-23-2013, 06:28 PM
im not trying to argue with your suggestion, ive just read, been told, and seen vids with small enclosures for these. also Buck; said hes seen a guy(s) running 2 in 3.7 cubes net per and it did well. just lacked on the lower end which i tune around 40hz for my taste in music. i usually dont listen to nothing below like 36-37hz anyway.

The system I heard was roughly 16 cubes for 4 obsidian 18's. It worked. Lacked low end a good bit, but it kind of leveled out in the mids 30's (35ish). Still a little quieter than it should be but still playing.

bgowdy31
10-23-2013, 08:07 PM
The system I heard was roughly 16 cubes for 4 obsidian 18's. It worked. Lacked low end a good bit, but it kind of leveled out in the mids 30's (35ish). Still a little quieter than it should be but still playing.

Yea, and again for what i listen to i like mine to be stronger from like 38hz & up where as i dont listen to alot of lower freq music. and again ive worked my space in my cargo area up to where is closer to 5 cubes per sub. I would have quite a bit more if 2 8" aeros didnt displace so much lol...

hispls
10-24-2013, 01:48 AM
I see. i wouldnt figure that DC xl 18s could work well in 4 cubes per but my friend/teammate has 4 xl 18s and after all disp they have 4 cubes each and it sounds good and is loud on "Real Time Music Ave" on Termlab.

Right, because I'm sure DC has some magical unicorn tears that make their 18's function in 4 cube. Good luck to you with this. Might as well throw 4 in that airspace if you just want to have a lot of cone area.

hispls
10-24-2013, 01:49 AM
I see. i wouldnt figure that DC xl 18s could work well in 4 cubes per but my friend/teammate has 4 xl 18s and after all disp they have 4 cubes each and it sounds good and is loud on "Real Time Music Ave" on Termlab.

Right, because I'm sure DC has some magical unicorn tears that make their 18's function in 4 cube. Good luck to you with this. Might as well throw 4 in that airspace if you just want to have a lot of cone area.

bgowdy31
10-24-2013, 02:38 AM
Right, because I'm sure DC has some magical unicorn tears that make their 18's function in 4 cube. Good luck to you with this. Might as well throw 4 in that airspace if you just want to have a lot of cone area.

Mine would have more then that i remeasured it and re did my dimensions i will be at like 5cu per sub. If the 2 8" aeros didnt take up so much id have more space

bgowdy31
10-24-2013, 02:38 AM
Right, because I'm sure DC has some magical unicorn tears that make their 18's function in 4 cube. Good luck to you with this. Might as well throw 4 in that airspace if you just want to have a lot of cone area.

Mine would have more then that i remeasured it and re did my dimensions i will be at like 5cu per sub. If the 2 8" aeros didnt take up so much id have more space

NASTY08IMPALA
10-24-2013, 02:49 AM
Mine would have more then that i remeasured it and re did my dimensions i will be at like 5cu per sub. If the 2 8" aeros didnt take up so much id have more space

Just do 2 15s in that space with a 10"aero and be done

bgowdy31
10-24-2013, 02:58 AM
Just do 2 15s in that space with a 10"aero and be done


Because i dont want to do 2 15s... But im done asking about this tho. Im just going to do my thing, if i dont like it then ill do something different

bgowdy31
10-24-2013, 03:08 AM
Just do 2 15s in that space with a 10"aero and be done


Because i dont want to do 2 15s... But im done asking about this tho. Im just going to do my thing, if i dont like it then ill do something different

Silverado SS
10-24-2013, 04:50 AM
Because i dont want to do 2 15s... But im done asking about this tho. Im just going to do my thing, if i dont like it then ill do something different

Never hurts to try let us know how it works out bud

---------- Post added at 04:50 AM ---------- Previous post was at 04:50 AM ----------


Because i dont want to do 2 15s... But im done asking about this tho. Im just going to do my thing, if i dont like it then ill do something different

Never hurts to try let us know how it works out bud

bgowdy31
10-24-2013, 01:06 PM
Never hurts to try let us know how it works out bud

---------- Post added at 04:50 AM ---------- Previous post was at 04:50 AM ----------



Never hurts to try let us know how it works out bud

Yea i figure why not try it. I mean ive opened up some more room. Closer to 5 or right at it per sub. It may lack alittle on the low end but i like mine stronger from 38hz and up