Jump to content

jack

18+ All Access!
  • Posts

    2150
  • Joined

  • Last visited

Posts posted by jack

  1. fuck that guy. i heard he has'nt even started working on his build yet......slacker.

    shit im still working on other systems, i won't be able to start on mine till the end of jan.

    like i posted on the autorama rollcall topic, Team DC will have atleast 6 vehicles their.

    funny shit Freddy... see you in a few. cant touch your existing burp yet. so you will have the lock on that podium spot

  2. this was shot today. vid is just under 2mins long but i didnt want to be the guy to make claims without backing them. nothing exciting, just screen shot. first run for the win, second run for the max, and third run street beat style(door open sensor on the floor with a prestart) back to back with voltage holding at a LOW 11v damn i need an alternator :angry:

    any thoughts comments etc?

    DC AUDIO FTmuthaf*****gW

    Hey christian nobody likes the sideline. i gotta have someone to make me sharpen my skills B)

  3. copied from another website... (dont remember where lol)

    This formula is also from "The Loudspeaker Design Cookbook". It tells you how long you need to make the vent.

    Fb - is the tuning frequency of your enclosure in Hertz.

    Lv - is the length of your port in inches.

    R - is the inside radius of your vent tube.

    Vb - is the internal volume of your enclosure in cubic inches. To convert cubic feet to cubic inches, multiply by 1728.

    If you want to use multiple ports, divide your enclosure volume by the number of ports you want to use, then use the result of this calculation as your Vb in the formula below to find out how long each port should be (a tip from JL Audio™).

    portform1.gif

    If you want to calculate square vents, the formula below will give you the value of R to use in the formula above.

    portform2.gif

    In the formula above, a is the area of your square vent (height x width), and (Pi) is approximately 3.141592.

    well that just cofused the shit out of me or maybe its cus ive been drinking since 10am dont know. thank you joey. how about a box design site that does tha calc itself if you just plug the numbers spreadsheet style?

  4. any links to a site that you can input your box area and port area and give the desired tuning it will give you the length etc... or the formula would help also. i know that it is 12-16 square inches of port area per cube but dont know how to get the length.

×
×
  • Create New...