cplkittle I noticed in the DIY articles you have written many on ported enclosures. I am currently designing a slot vented enclosure for an Alpine SWR-1241D. Here are some pictures of them on a CAD program: http://www.pbase.com/lc1/vented_enclosure
My quetsion on each 90degree bend in my port should I round off the corners to prevent the sound the air may create? Or is this somthing that I dont really have to worry about?
Thanks,
Jason
Replies (4)
P0werLifter on 08/13/2004 01:47:52
From what i understand and have read, you mainly need to round the edges on the end of your port so there wont be any whisping air noise at high output. I could be wrong but thats what i do, No problems just yet. But my next design is more of a transmission line then a typical port i guess u could say.
~Jason
uochronos on 08/13/2004 02:24:19
I was told that rounding all corners can help eliminate noise.... it is most important to roun the actaul slot onthe outside of the box but rounding all internal edges i was told would reduce chances of noise caused by high SPL output
LC1 on 08/13/2004 15:34:53
cplkittle on 08/23/2004 00:08:46
I apologise for my absence the last month or so. I personally round over every corner in any box I build, but as unchronos said, the last turn and the outside are the most important. Also the larger the port size, the less noise due to a drop in port air speed. A small port (2x6x??) can net airspeeds up to 90MPH. It is advisable to keep port airspeeds under 20-25MPH.
My quetsion on each 90degree bend in my port should I round off the corners to prevent the sound the air may create? Or is this somthing that I dont really have to worry about?
Thanks,
Jason
Replies (4)
P0werLifter on 08/13/2004 01:47:52
From what i understand and have read, you mainly need to round the edges on the end of your port so there wont be any whisping air noise at high output. I could be wrong but thats what i do, No problems just yet. But my next design is more of a transmission line then a typical port i guess u could say.
~Jason
uochronos on 08/13/2004 02:24:19
I was told that rounding all corners can help eliminate noise.... it is most important to roun the actaul slot onthe outside of the box but rounding all internal edges i was told would reduce chances of noise caused by high SPL output
LC1 on 08/13/2004 15:34:53
cplkittle on 08/23/2004 00:08:46
I apologise for my absence the last month or so. I personally round over every corner in any box I build, but as unchronos said, the last turn and the outside are the most important. Also the larger the port size, the less noise due to a drop in port air speed. A small port (2x6x??) can net airspeeds up to 90MPH. It is advisable to keep port airspeeds under 20-25MPH.
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