SwaggerWagon Posted March 3, 2011 Report Posted March 3, 2011 (edited) I have use of my brother's computer for a few minutes while he's over, and here is what I've come up with as far as box design. I just need some opinions to make sure this is all correct so I can start cutting tomorrow. I did most of the leg work by hand and just entered what I wanted in the box calc (thanks Torres!). Hopefully This will work, as I'm putting two DC Level 3 12s in it. The subs will be mounted on top of the box, each 1" from the left and right edges. The port walls go back 13.3" into the box, then extend 8.15" in either direction. Is this the propper way to measure port length when designe this way? I wish I could give a sketch of what it will look like. Edit: apparently I don't know how to post a picture..soo, crap. I can email a screenshot of the box calc. Edit #2: here's what I entered in the box calc: Outer dimensions Height: 15 Width: 46.5 Depth: 17 Port Dimensions Height: 13.5 Width: 4.4 Length: 34 Miscellaneous Woofer displacement: .3 Baffle thickness: .75 # of common port walls: 2 Check sub upward box desired net volume: 3.5 Edited March 3, 2011 by SwaggerWagon Quote
nCOMP1337 Posted March 3, 2011 Report Posted March 3, 2011 upload the screenshot to tin ypic, imageshack or photobucket and copy the link with tags Quote
SwaggerWagon Posted March 3, 2011 Author Report Posted March 3, 2011 Ahh. Thx! I'll c if I cn grab the comp from my bro for a few more minutes. He's doing HW..fml Quote
CJ18 Posted March 3, 2011 Report Posted March 3, 2011 The dimensions arent really the important part, the net airspace and port area per ft3 are the most important. For 2 Level 3 12s you are going to want about 3ft3 net(after sub and port displacements) with about 48in2 of port and tune however you like. Quote
SwaggerWagon Posted March 3, 2011 Author Report Posted March 3, 2011 (edited) The calc is putting port area at 59.4 in2, and 3.5 ft3 net. They're each going to see 700 rms of clean power. Is this still too big? Edited March 3, 2011 by SwaggerWagon Quote
CJ18 Posted March 3, 2011 Report Posted March 3, 2011 I would try to get down closer to 3ft3 net and 48in2 would give you 16in2 of port per ft3. Quote
SwaggerWagon Posted March 3, 2011 Author Report Posted March 3, 2011 Okay. I'll sit down and adjust some things. But quick question; if I put a port in the center to the back and have to bend it to the left and right (to make a "T"), do the extensions along the back wall need to be half the width of the port coming to the front? Quote
SwaggerWagon Posted March 3, 2011 Author Report Posted March 3, 2011 Sorry for all the questions, but this is all being done by hand now since my brother's left and I don't have a comp. Quote
SwaggerWagon Posted March 4, 2011 Author Report Posted March 4, 2011 So here are the final demensions for my new box. I'm gonna start this weekend for sure! This is my first box, so any suggestions or advice on building would be great. I'm not sure about bracing yet, other than 45* corners, and corner inserts under baffle (there will be a double baffle, but I'm just going to add a sheet of MDF to the existing baffle to make the subs flush). The photobucket album shows the history of the car so far (not much, but it's my first system/second car). Quote
SwaggerWagon Posted March 4, 2011 Author Report Posted March 4, 2011 Does anyone think this will be too shallow and wide?? Quote
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