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I've been wrestling with a sub build for quite awhile now that was detailed here. After some difficulty with how the box was going together (i.e. going together terribly) I decided that I needed to reassess things and do a bit of redesign to get somewhere that I'll be much happier with. I originally planned on a 3 cu^ft enclosure tuned to 20.75Hz. That resulted in an 22" cube external enclosure which ended up being quite large. I have since redesigned things for a 2 cu^ft enclosure that will be 19" cube. Only a 3" difference in each dimension but I think it will provide enough of a difference visually where it won't seem quite as monstrous.
I'm still keeping the same design aesthetic of a "Vintage" sub. The enclosure will be a wrapped in a walnut veneer and then wrapped with a large band of gray acoustic fabric to give it a look similar to an old 50's stereo cabinet.
Transfer Function:
The red line below is the initial 3cu^ft design and the yellow is the new 2 cu^ft box. There is a bit of difference here. The smaller enclosure has a little lower output at 20Hz but this is a trade-off I'm willing to make. I do gain some around 30Hz but may not be noticeable? Though really, anything I end up with will better than what I have now.
Enclosure:
Some Sketchup shots that show the smaller enclosure. The design is very similar to the original. Rounded edges, down-firing port, with a very recessed driver. I had to recess it enough to avoid the sub from hitting the acoustic fabric which results in a very thick baffle, 2.75" in total. The outer recess is 1.5" deep and the inner 1.25". The slot port is a little longer here. It runs up one side and extends out along the top to about middle of the box. No amp box this time around and honey-combed bracing rather than squared. I also didn't model the feet here but there will be some.
The design can't change now! Gotta role with this and make it work.
I'm still keeping the same design aesthetic of a "Vintage" sub. The enclosure will be a wrapped in a walnut veneer and then wrapped with a large band of gray acoustic fabric to give it a look similar to an old 50's stereo cabinet.
Transfer Function:
The red line below is the initial 3cu^ft design and the yellow is the new 2 cu^ft box. There is a bit of difference here. The smaller enclosure has a little lower output at 20Hz but this is a trade-off I'm willing to make. I do gain some around 30Hz but may not be noticeable? Though really, anything I end up with will better than what I have now.
Enclosure:
Some Sketchup shots that show the smaller enclosure. The design is very similar to the original. Rounded edges, down-firing port, with a very recessed driver. I had to recess it enough to avoid the sub from hitting the acoustic fabric which results in a very thick baffle, 2.75" in total. The outer recess is 1.5" deep and the inner 1.25". The slot port is a little longer here. It runs up one side and extends out along the top to about middle of the box. No amp box this time around and honey-combed bracing rather than squared. I also didn't model the feet here but there will be some.
The design can't change now! Gotta role with this and make it work.
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