Is 3 2.25" ports enough? sound good? single 15

[WOT]

jj

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[skmfkr 5,000+ posts]

hell no. ive got 3 4" for my 1 15. but you could get by with 2 4"

 

[bonesninja 5,000+ posts]

no...not enough area IMHO

 

[KHARPS 10+ year member]

I would imagine you'll get some port noise.

 

[WOT]

****, this is all hes got!!

 

[WOT]

hell no. ive got 3 4" for my 1 15. but you could get by with 2 4"

You also have a RD heavyweight though lol, this sub isnt much compared to that

 

[bonesninja 5,000+ posts]

You also have a RD heavyweight though lol, this sub isnt much compared to that

i just built a box for a 12" SX and it had 2 4"

 

[bonesninja 5,000+ posts]

Building a box for a bud right now and he just told me he wants to use EXTERNAL round ports, that have an inner diameter of 2.25"
This is for a single cadence wild beast 15" that will be getting about 1000watts.

The box is 2.75 cubes after sub displacement

I enterred the #'s in http://www.psp-inc.com/ that calculator and came up with 3 2.25" ports @ 9" length each gives me a 32-33hz tune

Hes only got 3 of these 2.25" tubes, which are 9" long each

Is my math correct and will that port be sufficient?

thats less than 12 sq. in of port for a 15" in almost 3 cubes:nono:

 

[bball09124 10+ year member]

It'll "work", but it'll sound like shit. Either just build a sealed box or port it properly.

 

[skmfkr 5,000+ posts]

You also have a RD heavyweight though lol, this sub isnt much compared to that

well still your gonna want like 2 4" aeros. you want atleast 8 square inches per cube. 2 4" aeros will give you 9 square inches per cube

 

[WOT]

Shitty, I was hoping this external polished port idea would work out....

 

[WOT]

I was just trying to use the materials he brought

 

[mazdakid 5,000+ posts]

he bought wood right? why not just make a slot port

 

[WOT]

Box is already built, sub whole cut etc, cutting out a wall isnt really an option, would be easier to start over.

Im trying to squeeze a square port, but its gonne be TIGHT.

External polished ports just woulda been cooler

 

[skmfkr 5,000+ posts]

just tell him hes a dumbass for thinking those small *** ports would work. and order the right ones. well i guess you could goto the hardware store and just get some pvc pipe. well i guess you could use what he has then after he hears all the air whistling out of the ports. you can cut the holes bigger and do 3 4" holes with pvc pipe