can someone calculate a port for me?

[Bigrick31 10+ year member]

pretty please with a cherry on top?

my box is 4.824^3ft the sub im running displaces .9 cu ft so im down to 3.924 and then port should be tuned to 35hz. i will be using either 3" or 4" pvc can someone tell me what size piece/s i need? and i have room for 2 of these if need be to get the area.

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[djman37 5,000+ posts]

http://www.psp-inc.com look for the calc. and WHAT sub has .9 of displacment!!!!

 

[Bigrick31 10+ year member]

http://www.psp-inc.com look for the calc. and WHAT sub has .9 of displacment!!!!

mtx 9500 12"

 

[Bigrick31 10+ year member]

sorry im dumb its .19^3ft i guess i need glasses

 

[Bigrick31 10+ year member]

ok so 2 3" ports 4.52" long

 

[Beginer 10+ year member]

I personally think that for 4cu.ft box two 3" ports are not enough. It's only ~14sq.in of port area... You need at least 40-50sq.in of port area.

With 2 3" pipes you will hear port noise I think.

 

[Trixter 10+ year member]

I personally think that for 4cu.ft box two 3" ports are not enough. It's only ~14sq.in of port area... You need at least 40-50sq.in of port area.With 2 3" pipes you will hear port noise I think.

but it's only a single 12....wait...a 4+cu' box for a single 12?!?!

 

[Beginer 10+ year member]

Hehe, maybe he wants a lot low bass //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif But anyway I think it's too little port area...

I've read in ROE that 12-16sq.inch of port area per one cu.ft is good choice.

 

[djman37 5,000+ posts]

sorry im dumb its .19^3ft i guess i need glasses

sounds more like it.//content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif