would this work? "idea" for box *horn?*

[spencer321 10+ year member]

just curious if anyone thinks this would work or be a total failure

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[Pioneer~Saturn 5,000+ posts]

I wouldn't see why not, looks like it'd be pretty cool //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif go for it //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Supergumby5000 5,000+ posts]

just looks like a ported clamshell to me

 

[helotaxi 5,000+ posts]

Wouldn't be a horn, but it might exhibit some mass loading and should work well assuming that he box volume an tuning are right.

 

[spencer321 10+ year member]

thats kinda what i was thinking, basically i stole (sorry) thumpper's box for the 2 10's icons, the one that hit 140db at something like 26hz, and made it into a single instead of a double and mirrored it over the center, hopefully i can get the clamshel effect and the horn loaded effect at the same time? lol i imagine it would either be insanely efficient, or there would be so much cancelation it wouldnt work at all, looking for a builders opinion

 

[Ed Lester 10+ year member]

looks like a standard ported box to me. I have built many like that and they work just fine.

Your port looks long though.

 

[Ed Lester 10+ year member]

Port in the middle can cancel a little so this design is not too good for high SPL applications. You would want to seperate the port opening from the cones more.

 

[spencer321 10+ year member]

Wouldn't be a horn, but it might exhibit some mass loading and should work well assuming that the box volume an tuning are right.

oh yeah, none of that is measured or even remotely to scale of any sort, i wasn't going to bother crunching the real numbers if the idea itself was a total failure

 

[spencer321 10+ year member]

Port in the middle can cancel a little so this design is not too good for high SPL applications. You would want to seperate the port opening from the cones more.

so your saying that i SHOULD run a dividing panel straight down the middle?

 

[spencer321 10+ year member]

this is the box the idea was derived from encase anyones unfamiliar

http://memimage.cardomain.com/member_images/9/web/3129000-3129999/3129131_7_full.jpg

did 140db at 27hz in 2cubes tuned the 35hz, i was toying with the idea of using 2 sdc2.5 10's tuned to 38hz off a bxi2008d

 

[spencer321 10+ year member]

would there be any benefit to loading these up isobaric? 4 subs instead of 2?

 

[helotaxi 5,000+ posts]

Only benefit to running ISO pairs is that the box volume is halved. Problem with doing that is that you still would want the same tuning as before and you'll need ot more than double the port length to get that tuning with the smaller box. You'll also halve the efficiency and be wasting the cone area of half the subs that you're using.

Iso-baric was great back in the day when most 12s wanted 3 cf EACH sealed. Now, most subs are designed to work in smaller boxes (at the cost of efficiency) and going with an Iso-pair ends up just being more expensive and a bigger hassle for no gain.

 

[spencer321 10+ year member]

Only benefit to running ISO pairs is that the box volume is halved. Problem with doing that is that you still would want the same tuning as before and you'll need ot more than double the port length to get that tuning with the smaller box. You'll also halve the efficiency and be wasting the cone area of half the subs that you're using.
Iso-baric was great back in the day when most 12s wanted 3 cf EACH sealed. Now, most subs are designed to work in smaller boxes (at the cost of efficiency) and going with an Iso-pair ends up just being more expensive and a bigger hassle for no gain.

im glad you explained that, makes sense, i didn't really understand the purpose of it... and now i really don't see why anyone would do it lol

i may give my design a try with some cheap home theatre subs from partsexpress first, and if they sound decent ill give them to my parents to replace the shitty sub that came with there bose setup, and if it doesnt work im only out 50$ plus materials

 

[THUMPPER 10+ year member]

thats kinda what i was thinking, basically i stole (sorry) thumpper's box for the 2 10's icons, the one that hit 140db at something like 26hz, and made it into a single instead of a double and mirrored it over the center, hopefully i can get the clamshel effect and the horn loaded effect at the same time? lol i imagine it would either be insanely efficient, or there would be so much cancelation it wouldnt work at all, looking for a builders opinion

I bet I have gotten 50 PM's so far about the Icon Test Box

there is a little more to this box than just the shape.....the port area is tapered

along the whole length

I got a bit more playing to do but when I'm finished I'll be offering this design ....

I find that having a (4 woofer) loaded V design like you are planning can work well BUT....

if the angle is to steep on the V the inner and outer subs will sound out of phase

from each other and will produce a noticable muddy note overlap....

this does not happen when only two woofers are used in a V formation

 

[rollerdj 10+ year member]

I bet I have gotten 50 PM's so far about the Icon Test Boxthere is a little more to this box than just the shape.....the port area is tapered

along the whole length

I got a bit more playing to do but when I'm finished I'll be offering this design ....

I find that having a (4 woofer) loaded V design like you are planning can work well BUT....

if the angle is to steep on the V the inner and outer subs will sound out of phase

from each other and will produce a noticable muddy note overlap....

this does not happen when only two woofers are used in a V formation

one of those would be me. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif i think i got is all figured out and on paper. although, what width port did you do?