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Second Skin Audio

2 12" DC lvl 3 Enclosure Design


Mile High Guy

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sorry its really not that much power to be honest. I would be careful with that much power on level 3s though. unless they are the new ones.

ya they're the new Level 3s. i ordered them this morning from corona_jeff. so i should be ok running those subs on that amp. thx for lookin out.

Headunit - Alpine 9857

Mids & Highs - T165,T1692

Mids & Highs Amp - T400-4

Subs - 2 12" DC Audio Level 3 M2s

Sub Amp - T1500-1bdcp

Alternator - MechMan 220a

Wiring - 1/0ga XS Power

Batteries - 2 Optima Yellow Tops

Read the fucking manual. Jesus Christ.

I dunno about that Steve...

Chuck Norris doesnt even do push-ups, he just pushes the earth down.

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You can fit them in there with a center port and still keep 3 cubes net at that tuning..

ok and would the port dimensions still be the same? is there a site that you know of where you are able to sketch everything out along with entering the measurements? i would like to have a basic layout and measurements with it when i find a shop to build this enclosure for me so that i know the box will be made to the correct specs and tuning freq. ty

If you can be patient with me, I'll draw you a complete sketchup model tomorrow after work with your center port and all dimensions. I'm just not gonna spend 45 mins to hour on a complete design at 11 at night on a weekday. ;)

'11 Jeep Patriot New Build

Head Unit: Pioneer AVH-P3200DVD

Front: Massive CK69 Components

Front Amp: Massive NX2

Rears: Infinity Kappa's

Subs: 8 Sundown SA-8 v2's

Sub Amp: AB 450.1

XS D3100

Come on 150!

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I completely understand and I thank you for your interest. I have no problem waiting on a design and i'm very appreciative for your generosity. Pm me if u need anymore info about my setup or anything at all.

Headunit - Alpine 9857

Mids & Highs - T165,T1692

Mids & Highs Amp - T400-4

Subs - 2 12" DC Audio Level 3 M2s

Sub Amp - T1500-1bdcp

Alternator - MechMan 220a

Wiring - 1/0ga XS Power

Batteries - 2 Optima Yellow Tops

Read the fucking manual. Jesus Christ.

I dunno about that Steve...

Chuck Norris doesnt even do push-ups, he just pushes the earth down.

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Well.. As promised. Here you go. I didn't round the edges or anything. Just a quick sketch, but you should get the picture. 3 cubes @ 33Hz.

333with41inches-2.png

333with41inches-1.png

Cheers.

'11 Jeep Patriot New Build

Head Unit: Pioneer AVH-P3200DVD

Front: Massive CK69 Components

Front Amp: Massive NX2

Rears: Infinity Kappa's

Subs: 8 Sundown SA-8 v2's

Sub Amp: AB 450.1

XS D3100

Come on 150!

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Well.. As promised. Here you go. I didn't round the edges or anything. Just a quick sketch, but you should get the picture. 3 cubes @ 33Hz.

333with41inches-2.png

333with41inches-1.png

Cheers.

that's exactly the design that i was looking for. i like the symmetry of that type of enclosure. i appreciate the time you spent helping me out on this thank you! :clapping:

Headunit - Alpine 9857

Mids & Highs - T165,T1692

Mids & Highs Amp - T400-4

Subs - 2 12" DC Audio Level 3 M2s

Sub Amp - T1500-1bdcp

Alternator - MechMan 220a

Wiring - 1/0ga XS Power

Batteries - 2 Optima Yellow Tops

Read the fucking manual. Jesus Christ.

I dunno about that Steve...

Chuck Norris doesnt even do push-ups, he just pushes the earth down.

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Well.. As promised. Here you go. I didn't round the edges or anything. Just a quick sketch, but you should get the picture. 3 cubes @ 33Hz.

333with41inches-2.png

333with41inches-1.png

Cheers.

that's exactly the design that i was looking for. i like the symmetry of that type of enclosure. i appreciate the time you spent helping me out on this thank you! :clapping:

Glad that you got the center port design you wanted OP but be aware that the design provided tunes to nearly 36Hz and the total net internal airspace is below 3 cuft. Thats why I had to go a little above of your specified width.

Here are the calculations for the center port box:

Port width:

External = 2.75 in internal = 1.375 in

Chamber area:

13.125 x 13.375 = 175,546875

2.125 x 4.125 = 8,765625

Total = 175,546875 + 8,765625 = 184,3125 sq.in.

Gross Chamber Volume:

184,3125 x 15 = 2764,6875 = 1,599 cuft

Net volume per chamber:

Vb = 1,599 cuft - 0.16 = 1,439 cuft

Physical Port length:

13.375 + 1.5 + 9 = 23.875 in

Effective Port Length:

PL = 23.875 + 0.5 x 1.375 = 24,5625 in

Tuning:

Since the is no direct tuning equation for T ports:

Total Vb = 2,878 cuft

Port Length (effective) = 24,5625 in

Port Area = 2.75 x 15 = 40,8 sq.in.

Using tuning equation it gives:

Fb = 35.8Hz

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so are the previous measurements and calculations wrong? i want to take my time and be sure that the enclosure that i'm getting built meets the specs for the subs along with the desired tuning frequency of 33-34Hz. if need be i can probably give up another 1/2" in depth but i can't go wider than 32" and have the enclosure sit flush in my trunk.

Headunit - Alpine 9857

Mids & Highs - T165,T1692

Mids & Highs Amp - T400-4

Subs - 2 12" DC Audio Level 3 M2s

Sub Amp - T1500-1bdcp

Alternator - MechMan 220a

Wiring - 1/0ga XS Power

Batteries - 2 Optima Yellow Tops

Read the fucking manual. Jesus Christ.

I dunno about that Steve...

Chuck Norris doesnt even do push-ups, he just pushes the earth down.

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No.. That is not 36 Hz.. Lol. It's just over 3 cuft @ 33hz after displacement, end correction, etc. Not sure how you're doing you're math, but it's way off.

'11 Jeep Patriot New Build

Head Unit: Pioneer AVH-P3200DVD

Front: Massive CK69 Components

Front Amp: Massive NX2

Rears: Infinity Kappa's

Subs: 8 Sundown SA-8 v2's

Sub Amp: AB 450.1

XS D3100

Come on 150!

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I can see what may be a bit of a change. The 13 3/8" is actually supposed to be 14.125". I goofed and clicked on the wrong line. Whether he uses the design or not, I was just stating that it's very possible to get what he's looking for. It's just a matter of playing with numbers. I'm pretty sure these were the numbers I punched in just going off the top of my head.

tor1.png

'11 Jeep Patriot New Build

Head Unit: Pioneer AVH-P3200DVD

Front: Massive CK69 Components

Front Amp: Massive NX2

Rears: Infinity Kappa's

Subs: 8 Sundown SA-8 v2's

Sub Amp: AB 450.1

XS D3100

Come on 150!

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thanks for your reply loudnlow87. i downloaded the torres box caculator today and was trying to learn how to use it. i wasn't sure how to enter the port dimensions for a slot port design that is in the middle of the enclosure ,but i did enter the measurements you gave me and i came up with almost the exact final box specs as you did except for the following specs: woofer displacement .32cuft., net vol. 2.92cuft and 34.12Hz tuning freq.

Headunit - Alpine 9857

Mids & Highs - T165,T1692

Mids & Highs Amp - T400-4

Subs - 2 12" DC Audio Level 3 M2s

Sub Amp - T1500-1bdcp

Alternator - MechMan 220a

Wiring - 1/0ga XS Power

Batteries - 2 Optima Yellow Tops

Read the fucking manual. Jesus Christ.

I dunno about that Steve...

Chuck Norris doesnt even do push-ups, he just pushes the earth down.

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