2 SQ HDS3 12's Enclosure

[bgowdy 5,000+ posts]

Ok so i have constantly playing around with enclosure calculator apps for like a month straight trying to learn how to use them in order to make a slot ported box. I have never designed or built one but its going to be the easier option for me to do the trunk the way i want. I wanted to go with a 8" aeroport but theres not enough space on the front plate of the enclosure for it one, and to me a 6" aero is not enough so i i decided to try and do a slot port.

I will be running these on a Soundstream Ta1.3k @ 1 ohm.

My goal with this is leaning more on the SPL side then just daily. This is my first time trying this out so go easy on me lol.

This is what i came up with:

2 Soundqubed Hds3 12s - d4

1 Soundstream Ta1.3kw

Enclosure-(These dimensions do not include extra layers or baffles, this is just to get the space and tuning down)

33-L X 13-H X 27.25-D

Gross - 5.40 internal vol

Port - 5.25-L x 11.5-H (60.37 square inches of port)

Port will be centered between the subs

2 Hds3 12s displacement: .26 (.13 ea)

Port Displacement: .79

45s/rounding(back corners): .10

4.25 cubes net after displacements

14.20 sq inches per cube

tuned to 36hz(36.38hz)

Click to read more...

 

[CSCStang]

Looks pretty good man. Yeah those hds' s like higher tuning. A little small on the net, but it should work well.

 

[bgowdy 5,000+ posts]

Looks pretty good man. Yeah those hds' s like higher tuning. A little small on the net, but it should work well.

hm would it need to be alittle bigger? i figured the 4.25 net(2.125 ea) would be a pretty good amount of space for them seeing they would probably see about 1k each

 

[CSCStang]

hm would it need to be alittle bigger? i figured the 4.25 net(2.125 ea) would be a pretty good amount of space for them seeing they would probably see about 1k each

I like to go 2.2 2.3, but that's a good amount of juice for them for sure. You'll be good.

 

[bgowdy 5,000+ posts]

I like to go 2.2 2.3, but that's a good amount of juice for them for sure. You'll be good.

ok, i wanted to try something different with the tuning, i usually tune around 39-40hz, but wanted to try tuning alittle lower lol. not low enough for decaf or nothing but just lower. i would like to be able to touch like 31-32hz pretty strong if i wanted to lol. i usually dont play below like 35hz but im going to SLAM this year and dont want to listen to 45hz + the whole time, i want to be able to demo alittle lol

 

---------- Post added at 06:39 PM ---------- Previous post was at 06:38 PM ----------

 

I like to go 2.2 2.3, but that's a good amount of juice for them for sure. You'll be good.

but i know my Honda is about peak at like 50hz anyway lol

 

[bgowdy 5,000+ posts]

ttt

 

[NASTY08IMPALA 5,000+ posts]

ttt

Can u go any wider or taller ..i have my box my hdc4 12s were id get rid of pretty cheap for ya..its 4.4 cubes tuned at 36 with a 8" octo

 

---------- Post added at 07:47 AM ---------- Previous post was at 07:46 AM ----------

 



 

---------- Post added at 07:47 AM ---------- Previous post was at 07:47 AM ----------

 

Its birch and coated in a roll on rugged bedliner type..its 35x28x15

 

[bgowdy 5,000+ posts]

Can u go any wider or taller ..i have my box my hdc4 12s were id get rid of pretty cheap for ya..its 4.4 cubes tuned at 36 with a 8" octo 

---------- Post added at 07:47 AM ---------- Previous post was at 07:46 AM ----------

 



 

---------- Post added at 07:47 AM ---------- Previous post was at 07:47 AM ----------

 

Its birch and coated in a roll on rugged bedliner type..its 35x28x15

Dimensions?

 

[bgowdy 5,000+ posts]

Can u go any wider or taller ..i have my box my hdc4 12s were id get rid of pretty cheap for ya..its 4.4 cubes tuned at 36 with a 8" octo 

---------- Post added at 07:47 AM ---------- Previous post was at 07:46 AM ----------

 



 

---------- Post added at 07:47 AM ---------- Previous post was at 07:47 AM ----------

 

Its birch and coated in a roll on rugged bedliner type..its 35x28x15

Na Im pretty much at my max dimensions

 

[bgowdy 5,000+ posts]

ttt

 

[Jeffdachef 5,000+ posts]

You might have less cubic feet than you think, to get a 36-37 hz tuning, with a 13h x 33w x 27.25d box with 5.25 x 11.5 port, your port length will be around 25 inches long. Your net airspace lands around 3.8 cubes after subtracting port and sub displacement.

 

[NASTY08IMPALA 5,000+ posts]

Na Im pretty much at my max dimensions

That sux

 

[bgowdy 5,000+ posts]

You might have less cubic feet than you think, to get a 36-37 hz tuning, with a 13h x 33w x 27.25d box with 5.25 x 11.5 port, your port length will be around 25 inches long. Your net airspace lands around 3.8 cubes after subtracting port and sub displacement.

how did you figured that? ive checked it on like 5 different apps and did the math on paper using the 12volt box calcs and got what i got above, the apps of course were not all the same but were close, and doing on it paper thats what i got

subs are .26 (.13 ea)

the port was 5.25 * 11.5 * 22.5 \ 1728 = .79

put it in the apps and then used pencil and paper/12volt.com last and it gave me 36.38hz with 4.25 cubes net

 

[bgowdy 5,000+ posts]

That sux

yea i know....... but i think it should be ok

 

[CheЯRyMan]

Jeff's numbers are correct 3.78 net @ 38hz 25 inches long The vent velocity is very low modeled with a 1200 watt amp you can make the port smaller gain more volume which means longer port lower frequency.