Incorrect dimensions on FAQ sub enclosure #3
I recently bought my S2000 and I absolutely love it! I'm in the process of upgrading the audio system in the car and ran across the electronics FAQ which described how to build a subwoofer enclosure:
https://www.s2ki.com/forums/index.php?showtopic=295344
It lists another website for 3 box designs:
http://www.geocities.com/mariobonifa...asurements.htm
My main concern is the design on the right. The piece with the trapezoidal cuts seem to have the wrong dimensions. If I assume that the 4.25", 12", and 22" dimensions are correct, then the 6.25" dimesnions seems to be wrong...I get 5.83". I get this new number by the pythagorean theorem, and from the fact that I actually cut the piece, only to realize the potential error later.
Anyway, I was curious if anybody else has ever built that version of the box with success. Any help much appreciated.
https://www.s2ki.com/forums/index.php?showtopic=295344
It lists another website for 3 box designs:
http://www.geocities.com/mariobonifa...asurements.htm
My main concern is the design on the right. The piece with the trapezoidal cuts seem to have the wrong dimensions. If I assume that the 4.25", 12", and 22" dimensions are correct, then the 6.25" dimesnions seems to be wrong...I get 5.83". I get this new number by the pythagorean theorem, and from the fact that I actually cut the piece, only to realize the potential error later.
Anyway, I was curious if anybody else has ever built that version of the box with success. Any help much appreciated.
I think you may be the first to actually read that and try and build it. Most of the guys here that make their box, just do it. I don't recall anyone saying hey I used that and it was wrong.
I'll double check it in the morning.
I'll double check it in the morning.
Yeah, I figured as much. I usually build my own boxes from scratch as well. But I saw the plans, and figured I'd save myself a little time in the the design phase and get right to the building!
Too much instant gratification I guess! Thanks for any input you might have!
Too much instant gratification I guess! Thanks for any input you might have!
funny this should pop up. I'm working on the same box. Seems like it was designed for 1/2" board, not 3/4.
Most of it still seems to work. I'm going to narrow the top board town to 12" width so it'll sit between the rails and then work from there.
Gave me an excuse to go get a new table saw.
Also, by going with a 12" top I'll be lowering the top of the box by 3/4th of an inch. So I can use the spare space to make a nifty cover.
Most of it still seems to work. I'm going to narrow the top board town to 12" width so it'll sit between the rails and then work from there.
Gave me an excuse to go get a new table saw.

Also, by going with a 12" top I'll be lowering the top of the box by 3/4th of an inch. So I can use the spare space to make a nifty cover.
I used that box and yes you will need to adjust the measurements based on what thickness of board you use.
I also assembled everything but the bottom and then measured the bottom area and cut it out.
I also assembled everything but the bottom and then measured the bottom area and cut it out.
I'm going change the top and smaller panels.
The bottom is sitting at 12"X12". So I'm going to leave that. I'll narrow down the top to the same width (22"X12") and then trim/shave the 4 smaller panels to match up with the other ones (top, bottom, front and back) once I have the four of them test fit together.
The bottom is sitting at 12"X12". So I'm going to leave that. I'll narrow down the top to the same width (22"X12") and then trim/shave the 4 smaller panels to match up with the other ones (top, bottom, front and back) once I have the four of them test fit together.
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Thanks everybody for their replies. I will adjust my sub just as all of you have done!
JasonW thanks for the diagram, it's pretty similar to the one in the FAQ but with 0.5" board instead of 0.75" board. However, I still end up with the same math problem. If you look at just the trapozodial shaped piece, then the side labeled 4.25" is 3" short of the bottom for a total of 7.25" per the drawing. And the 12" bottom length is 5" short on both sides for a total of 22"per the drawing. The drawing labels the diagonal length as 6.25", however, mathematically the length should be the SQRT(3^2+5^2)=5.83". Hence, my mathematical dilemma! The board thickness shouldn't be an issue as this is a 2-dimensional issue.
edit (I became a member and added a picture!)

By the way, I really dig your sub looks super clean and I look forward to having one of my own. Anyway, just curious if your dimensions exactly match up with the drawing or not?
JasonW thanks for the diagram, it's pretty similar to the one in the FAQ but with 0.5" board instead of 0.75" board. However, I still end up with the same math problem. If you look at just the trapozodial shaped piece, then the side labeled 4.25" is 3" short of the bottom for a total of 7.25" per the drawing. And the 12" bottom length is 5" short on both sides for a total of 22"per the drawing. The drawing labels the diagonal length as 6.25", however, mathematically the length should be the SQRT(3^2+5^2)=5.83". Hence, my mathematical dilemma! The board thickness shouldn't be an issue as this is a 2-dimensional issue.
edit (I became a member and added a picture!)
By the way, I really dig your sub looks super clean and I look forward to having one of my own. Anyway, just curious if your dimensions exactly match up with the drawing or not?




