What is the volume and the tuning of this box?

[Slammed 5,000+ posts]

What is the internal volume and the tuning of this enclosure?

LENGTH 21 INCHES

BOTTOM DEPTH 18 INCHES

TOP DEPTH 18 INCHES

HEIGHT 16.25 INCHES

PORT IS 14.75" LONG

WITH 41.32 CU.IN. OF AREA.

5/8 MDF

just want to see what you guys came up with //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Click to read more...

 

[Slammed 5,000+ posts]

forgot to mention......

the width of the port is 3"

 

[jewishfvck]

2.5 cubic ft.

38 hz

 

[Slammed 5,000+ posts]

thanks for the reply

Im curious, if the width is 1.75"...then it would be tuned to around 30hz?

 

[ngsm13 5,000+ posts]

What is the internal volume and the tuning of this enclosure?

LENGTH 21 INCHES

BOTTOM DEPTH 18 INCHES

TOP DEPTH 18 INCHES

HEIGHT 16.25 INCHES

PORT IS 14.75" LONG

WITH 41.32 CU.IN. OF AREA.

5/8 MDF

just want to see what you guys came up with //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

What is the port height? Are those internal or external dimensions?

nG

 

[Slammed 5,000+ posts]

What is the port height? Are those internal or external dimensions?
nG

port height is 14.75"

width is 1.75"

external dimensions

 

[ngsm13 5,000+ posts]

port height is 14.75"
width is 1.75"

external dimensions

So the port is 14.75" tall AND 14.75" long?

nG

 

[Slammed 5,000+ posts]

So the port is 14.75" tall AND 14.75" long?
nG

thats what the gentleman told me

its a 15" enclosure

 

[ngsm13 5,000+ posts]

1.75" wide = ~38hz

3" wide = ~49hz

~2.45 cubes NET internal volume after port and sub displacement.

nG

 

[Slammed 5,000+ posts]

1.75" wide = ~38hz3" wide = ~49hz

~2.45 cubes NET internal volume after port and sub displacement.

nG

thank you sir

//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

what program do you use?

 

[ngsm13 5,000+ posts]

Math + Calculator.

nG

 

[Immacomputer 10+ year member]

That enclosure is more like 2.3 cubic feet tuned to at a lowest, 45hz. If you made the port 1.75" wide, you would have about a 35hz tuning, maybe a little higher.

The enclosure sounds like a horrible idea for any 15" sub that I know of. Port area is low, enclosure volume is low, tuning frequency is high, and the wood isn't thick enough which also makes me believe it's not braced either. The port wall actually goes too deep too if the wall is really 14.75" as that puts it only 2 5/8" away from the back wall. Stay away from it if you're looking to buy it.

 

[Slammed 5,000+ posts]

Math + Calculator.
nG

//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[Slammed 5,000+ posts]

That enclosure is more like 2.3 cubic feet tuned to at a lowest, 45hz. If you made the port 1.75" wide, you would have about a 35hz tuning, maybe a little higher.
The enclosure sounds like a horrible idea for any 15" sub that I know of. Port area is low, enclosure volume is low, tuning frequency is high, and the wood isn't thick enough which also makes me believe it's not braced either. The port wall actually goes too deep too if the wall is really 14.75" as that puts it only 2 5/8" away from the back wall. Stay away from it if you're looking to buy it.

one of my friends is looking into a 15" box for his JL W3.

I told him to build it himself, he doesnt want to

 

[Slammed 5,000+ posts]

now the dude says that the port height is 15 1/8 X 1 7/8

//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif