May 2, 200520 yr well it could be. but if i was designing it i would design it for daily. then have another port that is the same length as daily, but just get a Mic and do a series of bups in 5Hz incramends, the loudest frequincy is what i then use for testing and 10 Hz above and below. then i would just take off a little bit of the port at a time untill SPL starts to drop off instead of increase with shortening. then look back at my recordings, the loudest length would be the length to make the SPL port. interchagebale is just what i would do.another option is that i may do when i do my sub stage. have a plexi window. when i want do do an SPL burp i plug my daily port then take out the plexi window and replace it with an SPL port....
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