I wanted to finish up this project. I had intended to build a couple more of these, but I have decided on another project. I'm going to sell off the MFW amps I have and go with multiple sealed versions.
So to wrap this up I wanted to post a drawing I put together. Its not fancy or to scale but will give the outline of how to assemble the sub. I have the dimensions at home and I will post the cut list with dimensions later, maybe this weekend. I have numbered all the pieces with unique numbers unless there are multiples of that cut. There are a total of 14 critical pieces not including the extra bracing I added in the enclosure and port.
Here you go......
Here is the Cut Sheet:
1. 16 3/4"X19 1/4" X2(Double Baffle)
2. 16 3/4"X17"
3. 16 3/4"X7" Round over along one of longest sides
4. 16 3/4"X22"
5. 16 3/4"X4" 45 angle both ends measured short to short
6. 16 3/4"X2 3/4" 45 angle both ends measured short to short
7. 16 3/4"X8 1/8"
8. 16 3/4"X8 1/2" 45 angle both ends measured short to short
9. 16 3/4"X12 7/8" Round over along one of longest sides
10. 16 3/4"X12 7/8" 45 angle both ends measured short to short
11. 16 3/4"X21 1/2"
12. 16 3/4"X22"
Driver Cutout: 13 7/8"
Driver Recess: 15 7/8"
Port Dimensions 1 1/2" X 44 1/2"
Internal Volume 2.75-2.9 Cubic feet.
While these cuts are accurate just a few notes:
I would assemble the Front baffle and mount to the left side(facing woofer) and the top. This will let you start work on the inside bracing and port assembly without having the back and bottom in the way. While the cuts above worked for me, adjustments should be made to keep the port cross section to 1 1/2" throughout its length.
Then move onto the internal bracing and port assembly. Loose lay the bracing and port pieces into the box and measure port cross section to top and where back will be once installed. You may need to adjust the lengths on the 45 degree pieces to keep the 1 1/2" port diameter over its length. Note I installed the back before working on the port assembly but I would leave it off until later next time....
I added some bracing in the port to address some of those unbraced 7/8" panels, I tried to add the equal amount of bracing to the port as the internal volume hoping the decreased volumes would offset each other with respect to tuning.
I added some VCT tile to the largest panels which could not be braced and some acoustic foam to try to help with standing waves. The last steps are to add Back, bottom and side to button it up and finish.
My finishing stinks(worse than my carpentry) and this one was rushed because Christmas snuck up on me and this was a gift for my brother.......
MFW15B.pdf 15.5771484375k . file