I used winISD pro to model a Dayton quatro 15"in a br and came up with this ; 7.3 cu. ft. with a 4"x8.4'' port. I'm not sure if this is right, because of others i've seen use a much longer port&smaller box,(winISD says -3 db@20 hz). Is this right or wrong? If it's wrong what was my mistake?
Your box is well designed. You could go down to 6.5 cu. ft with a 10 inch long 4" diameter port, this will be a bit closer to room gain in a standard room.
If you go smaller, the port need to be longer, that's why you saw that.
If you go smaller, the port need to be longer, that's why you saw that.
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