Box Design in Soul w/ 15"

[robbythedude]

you still have account for "a" port.
these like tuning around 35hz. ( told from sq )

mine it tuned for 34hz .

According to the round-port calculator on their site, I just need 7.68" of port length to get 35Hz...

Is that correct? Screen shot of calculator: imgur: the simple image sharer

 

[LosIsATool 5,000+ posts]

You need to watch it with a DDM. Most volt meters won't keep up. If not you won't have a sub long.

 

[I'mPoor:(]

This chart is what Andrew "Black Nasty" posted on the soundqubed only group on facebook.

Here is my input on what I have found to be optimum in sound and overall performance (SPL) for both the HDC3 and HDC4. Now there are several versions of both of these subs and I have tested countless hours with both. This is my recommendation, it isn't intended to be the end all BEST but will get you really **** close

All recommendations are with alum coil D1 subs. Single sub setup, simply multiply for multi sub setups, works great in my testing.

HDC3 old version (Old Style basket) Stiff suspension

1k input power

HDC310 - 2.0 cube net with 18 sq inch port area per cube - tune between 36-41 hz

HDC312 - 3.0 cube net with 18 sq inch port area per cube - tune between 34-39 hz

HDC315 - 5.0 cube net with 18 sq inch port area per cube - tune between 35-40 hz

HDC318 - 6.5 cube net with 18 sq inch port area per cube - tune between 33-38 hz

2k input power

HDC310 - 1.5 cube net with 17 sq inch port area per cube - tune between 36-41 hz

HDC312 - 2.5 cube net with 17 sq inch port area per cube - tune between 34-39 hz

HDC315 - 4.0 cube net with 17 sq inch port area per cube - tune between 35-40 hz

HDC318 - 5.5 cube net with 17 sq inch port area per cube - tune between 33-38 hz

HDC3 current version

1k input power

HDC310 - 1.5 cube net with 17 sq inch port area per cube - tune between 36-41 hz

HDC312 - 2.5 cube net with 17 sq inch port area per cube - tune between 34-39 hz

HDC315 - 4.0 cube net with 17 sq inch port area per cube - tune between 35-40 hz

HDC318 - 5.5 cube net with 17 sq inch port area per cube - tune between 33-38 hz

2k input power

HDC310 - 1.25 cube net with 16 sq inch port area per cube - tune between 36-41 hz

HDC312 - 2.25 cube net with 16 sq inch port area per cube - tune between 34-39 hz

HDC315 - 3.75 cube net with 16 sq inch port area per cube - tune between 35-40 hz

HDC318 - 5.25 cube net with 16 sq inch port area per cube - tune between 33-38 hz

HDC4 old version (soft suspension)

2k input power

HDC412 - 2.75 cube net with 18 sq inch port area per cube - tune between 34-39 hz

HDC415 - 4.5 cube net with 18 sq inch port area per cube - tune between 35-40 hz

HDC418 - 6.0 cube net with 18 sq inch port area per cube - tune between 33-38 hz

4k input power

HDC412 - 2.25 cube net with 17 sq inch port area per cube - tune between 34-39 hz

HDC415 - 3.5 cube net with 17 sq inch port area per cube - tune between 35-40 hz

HDC418 - 5.25 cube net with 17 sq inch port area per cube - tune between 33-38 hz

HDC4 current version (stiff suspension)

2k input power

HDC412 - 3.0 cube net with 18 sq inch port area per cube - tune between 34-39 hz

HDC415 - 5.0 cube net with 18 sq inch port area per cube - tune between 35-40 hz

HDC418 - 6.5 cube net with 18 sq inch port area per cube - tune between 33-38 hz

4k input power

HDC412 - 2.25 cube net with 17 sq inch port area per cube - tune between 34-39 hz

HDC415 - 3.75 cube net with 17 sq inch port area per cube - tune between 35-40 hz

HDC418 - 5.5 cube net with 17 sq inch port area per cube - tune between 33-38 hz

You will notice the HDC3 and HDC4 like the same tuning based on power and suspension. I have built multiple boxes with different tuning to test how these really performed and these were from my notes on what they really like to get loud. Hope this is helpful.

SoundQubed Woofer Displacement

8" 10" 12" 15" 18"

HDS200 -0.06 0.06 0.07 0.11 -

HDS300 - 0.07 - 0.09 - 0.13 -

HDC3 - 0.11 - 0.13 - 0.17 - 0.23

HDC4 - - 0.19 - 0.25 - 0.33

 

[CSCStang]

^Thorough

 

[robbythedude]

According to that, I shouldn't have a problem moving up to an HDC3 18" woofer....

Hmmmmm?!

How do I get into this SoundQubed enthusiast Facebook club? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[robbythedude]

According to the round-port calculator on their site, I just need 7.68" of port length to get 35Hz...Is that correct? Screen shot of calculator: imgur: the simple image sharer

Sorry to bump, but anybody have an answer for this?

 

[hispls 5,000+ posts]

you still have account for "a" port.
these like tuning around 35hz. ( told from sq )

mine it tuned for 34hz .

Can't imagine why they recommend different on their website:

Box Sizes and Tuning

Those subs are a DD 95 knockoff. Personally I'd use a DD style box and tune up from there if I were trying to get loud.