Slot ported enclosure for 12" Tantric HDD

[Iloveweed1864 10+ year member]

Would this be good for a Tantric HDD 12?

I want it to go nice and low with authority, but still be able to play quick drum beats like death metal.

I listen to rap and deathmetal if that helps with the freq response.

Vehicle is a 2001 Chevy Cavalier Z24 coupe

Amp is going to be a 2500-3000w (havent bought it yet)

but it will temporarly on a memphis 500w rms amp

Box Specs

15" H x 30" x 12"

Port 13.5" x 2"

Gross Volume 2.34ft

Net Volume 1.64

Port area per foot 16.49in^2

Port area 27.00In^2

Tuning is 35.47 ( torres is being a ***** to get a big port area and low tuning :/ )

Port length 30In

Bracing is 45's and threaded rod plus double baffle.

Picture is below.

Click to read more...

 

[Iloveweed1864 10+ year member]

View attachment 26544901Here is a top down shot.

 

[Nutdawg651]

Looks nice good luck

 

[Iloveweed1864 10+ year member]

Thanx man //content.invisioncic.com/y282845/emoticons/fro.gif.c695f1f814b01c4ad99fe7f8cccadd29.gif

 

[dbeez 5,000+ posts]

Not enough port area at all

 

[Iloveweed1864 10+ year member]

Yea I was told 33 by Tantric but with torres I cannot get it lower than something stupid like 44hz and thats with 50" of port. I dont know what Im doing wrong. Should I make the box bigger it self or how would I get a bigger port area and still be in the low 30's?

 

[bbeljefe]

Larger cabinets will allow for shorter ports, but you don't want to go too large if you plan on running that amount of power. And to clarify, it isn't Torres Box Calculator that's causing the port to be so long... it's the laws of physics. ;-)

 

[Iloveweed1864 10+ year member]

So should I use a bigger enclosure?

Because I was told by Tantric Sounds to use 2.25cubes with 33" of port area at 22" long and that would put me into the low 30's but in Torres I get 43.3hz. Is that to high or i'm I just tripping?

 

[dbeez 5,000+ posts]

I would go 2.5 cubes and get to 15^2 port per cubic foot which means 37.5^2 overall now im not going to do all the math on it but there's some good guidelines. Just make sure you subtract everything uour at 2.5 or very close to it.

 

[Iloveweed1864 10+ year member]

I would go 2.5 cubes and get to 15^2 port per cubic foot which means 37.5^2 overall now im not going to do all the math on it but there's some good guidelines. Just make sure you subtract everything uour at 2.5 or very close to it.

Ok thank you Dbeez, so after displacement of the bracing and woofer and port , etc it should be 2.5cubes? I'm going to play around with those numbers

 

[dbeez 5,000+ posts]

Yes if the the cubic ft changes so does tuning so if you start at 2.5 and then start suntracting your tuning and all are way off.

 

[Iloveweed1864 10+ year member]

Yes if the the cubic ft changes so does tuning so if you start at 2.5 and then start suntracting your tuning and all are way off.

I see.. So would this be better? View attachment 26544913

 

[Iloveweed1864 10+ year member]

Its kinda hard to tell but its 2.51 cubes after displacement and tuned to 34.51 hz with 15.54in^2 per foot for a total of 39.00in^2

 

[dbeez 5,000+ posts]

Not sure im not gonna do all the math man.

 

[bbeljefe]

So should I use a bigger enclosure?Because I was told by Tantric Sounds to use 2.25cubes with 33" of port area at 22" long and that would put me into the low 30's but in Torres I get 43.3hz. Is that to high or i'm I just tripping?

Their recommendation would get you a tuning of ~38Hz. In the vehicle it will sound lower so you should wind up ~34-5.

Bumping the internal volume up to 2.5 cubes with that port will get you down to 32Hz.