CRV15 Ported Box Specs- Review Please

[concept11253 10+ year member]

Hey, I just finished up the plans for my box and I am about to go tear up some wood this weekend, but I want to make sure my specifications are correct.

Total Enclosure Volume - 9661.68 in³

Enclosure Dimensions (Includes thickness of 3/4" MDF wood) -

Width - 28.5"

Height - 18.5"

Length - 22.5"

Frequency - 30hz

Vent Quantity - 4 Round Ports.

Vent Length - 15"

Vent Radius - 1.5"

Thanks

Edit:

I am also contemplating a 32hz box instead of a 30hz.

In that case the Vent Length will have to be 13.3"

Click to read more...

 

[Moe Lester 10+ year member]

you need WAY more port area. 28 sq in isnt really enough.

 

[concept11253 10+ year member]

Hmm alright. Like how much are we talking? Should I use 4" PVC instead? And change the Port Lenght?

 

[Moe Lester 10+ year member]

Id go for 50-65 sq in if you can. 4 4" round ports would be good enough if you have to go round. Youll have to increase the length and box size to make up for the extra displacement though.

 

[concept11253 10+ year member]

Alright thanks. I will go 4 4" ports then.

 

[flakko 5,000+ posts]

those are gonna be some LOONG ports

 

[Moe Lester 10+ year member]

those are gonna be some LOONG ports

slot port ftw //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[concept11253 10+ year member]

I would go slot, but I hate the way they look. Round looks so much cleaner to me. Is it possible to have dual slot ports on a single cell box? I am going for symmetry here.

EDIT::

And how much clearance between the port and the back of the box do I need?

 

[Moe Lester 10+ year member]

I would go slot, but I hate the way they look. Round looks so much cleaner to me. Is it possible to have dual slot ports on a single cell box? I am going for symmetry here.

yes it is

minimum would be the ports diameter or width, depending on whether its a round or slot port

http://img225.imageshack.us/my.php?image=p10100956ns.jpg

http://img225.imageshack.us/my.php?image=p10100970cf.jpg

 

[flakko 5,000+ posts]

will he be fine with 2 4" aeros? i mean 2 3" aeros are enough for a single rlp... and this is a 15 cvr, dont move THAT much more air than an rlp.

 

[concept11253 10+ year member]

I am kind of liking that dual slot thing. It is sounding like 200% easier to make. I think I am gonna need like 4x 2 foot ports if I go round.

 

[Chevyaudio 5,000+ posts]

Flakko would you happen to have the Full T/S parameters List for those 15 CVRs I want to put it into Win ISD

 

[concept11253 10+ year member]

Is it possible to have like an exhaust pipe style round port, where it starts in the box and extends out? I am not sure if I can fit the 4" ports into the box with out changing the recommended volume.

 

[Chevyaudio 5,000+ posts]

yes round ports can extend outside of the box

 

[flakko 5,000+ posts]

erm leme get the manual...

FS 20.8

SPL 89.1

SD 137

RMS 500

Freq range 25-500

xmax 12.5mm

RE 6.84

LE 6.3

VC d 63.5

VC h 34.5

QMS 10.81

QES .442

QTS .425 (sealed ???)

BL 22.36

vas 261.45

mms 247.8

displacement 243.6 in