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g2shuck

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  6. AR Cone XL 15s Box

    in DC Sound Lab - Big Bass on ANOTHER LEVEL!

    Posted · Edited by g2shuck

    I am workingon the design for my two new ar coned xl 15s. Power will be a dc 7.5k. I am very tight on space since its a sealed trunk build with a rear battery bank. I wanted to do aeros so I could have ports for daily and for burping, but could only fit two 6 inch aeros on the baffle which I do not feel is enough so have worked on a design with a slot port. Since I am overpowering them how is this design?

    b0xdaily2_zpsd940befc.jpg

  12. Square Inches Of Port

    in DC Sound Lab - Big Bass on ANOTHER LEVEL!

    Posted

    I am at work so do not have Torres till I get home but here are some rough numbers based off calculations. What do you guys think?

    16.76 Gross Volume

    2.63 Port Displacement

    14.13 Net Volume

    28 Hertz Tuning

    Top Slot Port

    5.75 Inches Tall x 45 Inches Wide x 17.58 Inches Long

    258.75 Square Inches Of Port

    18.31 Square Inches Of Port Per Cubic Feet Of Net Volume

  15. Square Inches Of Port

    in DC Sound Lab - Big Bass on ANOTHER LEVEL!

    Posted

    Right the gsme was to peak your box at the same freq as your vehicles res freq.it.only had to play that one freq too. There.is no way I could ever consider anything over 20 sq in of port per cube for musical use. Even that scares me. My limit is really 17 to 18 for woofers that willplay music .

    I will be between 19-20 inches per foot with 250 square inches and 13 cubes net. Sound ok?

  16. Square Inches Of Port

    in DC Sound Lab - Big Bass on ANOTHER LEVEL!

    Posted

    When I ran my two dc level 4 12a I had 72 square inches of port, and they sounded great and where no peaky. They have 23.5 mm of xmax. That calculator says they need 82.39 inches. So I was running roughly 15 percent less port area than that calculator says to and loved it. So if i do 250 square inches this time I will be about 17 percent less than the calculator. I think that will work out great on 5k clamped per sub with drivers side ported wall.

  19. Square Inches Of Port

    in DC Sound Lab - Big Bass on ANOTHER LEVEL!

    Posted

    There's your formula:

    http://www.carstereo.com/help/Articles.cfm?id=31

    You can get away with less in a vehicle cabin but I try not to cut from the suggested minimum number TOO much. The 15" per foot is a rule of thumb for MOST drivers. However, port area isn't driven by how much airspace you have. A given sub, just for generic example an 18" sub, will need the same amount of of port if it's in a 5 cube as it would if it's in a 6 cube box. Desired tuning, Xmax, and cone area is what should be being used to determine port area.

    I knew that is was not box dependent which is why I was not happy to keep getting told 15 per foot. According to that claculator I need 300 inches for the two 18s with 32.5mm xmax tuned to 30 hz. WAY more than 15 per foot lol.

  20. Square Inches Of Port

    in DC Sound Lab - Big Bass on ANOTHER LEVEL!

    Posted

    I keep getting told to stay around 15 square inches of port for cubic feet which I have always done in the past, but is there not a formula to find port area based off sd and xmax? I am doing a wall with two level 6 m3 18s and 15 inches per foot would be around 200 sqaure inches of port for 12 cubes net. To me that just seams really low for two 18 with 32.5mm xmax and 1217cm² sd.

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