Originally Posted by lukeman269
After i get done building a box i blow all the saw dust out of it with compressed air and I have noticed saw dust gets trapped in the corners if there aren't 45's. Along with what the other guys said, i think it helps smooth the airflow for the port. I mostly do 45's in my boxes now as long as I get paid enough to make them lol. It also strengthens the corners of the box.
Make sure if you do 45's, 45 the inside port corner parallel so your port width is even along the entire length of your port. Or at least round over the inside port corners.
the problem is an air compressor and a subwoofer act to different. It would be sort of like comparing DC to AC. They both move air but the compressor is one way and constant. The subwoofer is push pull and not constant. a sound wave can spin in a corner and create a better transition than a 45 angle could.
dead spots in an enclosure can make it more efficient.you can also create turbulence in the enclosure to create a layer of air that doesn't move between the wall and the other moving air, this will act as a much smoother and less resistant layer than any material ever could. The issue is getting it to all work together.
edit: you also have to realize sometimes moving all the sound and air from an enclosure as you can is not the best way to get air movement and sound outside of the enclosure.
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