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jj53913
04-27-2009, 03:19 PM
I am building a box and have always liked the looks of bigger round ports. If I can find some I was woundering what you guys thought about 2 12" round ports for ruffly 20 cu ft (before displacement). I am biulding a box for 2 DP 21's and IA recomends 120 cu. in. of port and a 12" round port would be 113 cu. inches.

dman4486
04-27-2009, 03:21 PM
are you asking if there is such a thing as too much port area?

jj53913
04-27-2009, 03:25 PM
No, I have never used round ports and was wouldering if the ports being that big around would cause any problems and being just a little under on cu. in. in the end. It would only be 226 cu in. but I remember reading that round ports are a little more efficent that slot ports so you can get away with running a little less port area.

mlstrass
04-27-2009, 03:29 PM
I just finished a box for 2 21's. 18cubes with 2 10" ports tuned to 34Hz. SLAMS off 2 1500D's...

SicAudio
04-27-2009, 03:36 PM
actually slot ports are more efficient than round, especially for spl. thats why people use slot ports, they retain most of the sq and boost the spl by alot.

bunkerking09
04-27-2009, 03:37 PM
actually slot ports are more efficient than round, especially for spl. thats why people use slot ports, they retain most of the sq and boost the spl by alot.

****?

jj53913
04-27-2009, 06:44 PM
now I am not no stereo pro so I am probobly wrong but I thought a round port was more efficiant because the air actually passes over less surface that a slot port. and a slot port is a big plus on a support part of the box.

jj53913
04-27-2009, 06:49 PM
Well when I finish the box I will see where I sit on cubes but if I end on the small side I mite have to try 2 10" ports

bread0710
04-27-2009, 06:56 PM
now I am not no stereo pro so I am probobly wrong but I thought a round port was more efficiant because the air actually passes over less surface that a slot port. and a slot port is a big plus on a support part of the box.

so did i :confused: