Joe X Posted October 28, 2015 Report Posted October 28, 2015 Its a small difference so you could go ahead and dismiss if that was the case but I don't know how is your port or how you calculated it.
nahinder Posted October 28, 2015 Author Report Posted October 28, 2015 Right now the design is like this hope its clear
Joe X Posted October 29, 2015 Report Posted October 29, 2015 Sub up I imagine, your port length can be shorter due to the end correction for slot ports, also some heavy bracing may be needed for that sub. Will seek to double check those calculations.
nahinder Posted October 29, 2015 Author Report Posted October 29, 2015 I added correction to the port but i need to substract that ? Where do i need to put braces ? Its gonna be Sub and port up The has to be 10cm less wider so im losing around 5 liters again
Joe X Posted October 29, 2015 Report Posted October 29, 2015 Check out this link: http://www.jlaudio.com/header/Support/Tutorials/Enclosure+Ports/Tutorial%3A+Enclosure+Ports/287541
nahinder Posted October 29, 2015 Author Report Posted October 29, 2015 Thnx Joe I think ive seen this link before but just like this one it just brings me to the homepage of jl ive tried looking for a port explaination on there but looks like its not there anymore.
Joe X Posted October 29, 2015 Report Posted October 29, 2015 It's there but anyways here's the relevant infos:
nahinder Posted October 29, 2015 Author Report Posted October 29, 2015 Yes this is exactly how i calculated the length of the port and added the correction First I calculated the width and length of the port Width Port: 7.19 CM Length Port: 94.7 CM After that the new length with the correction 7.19/2= 3.959 3.959 + 94.7 = 98.295 Then i calculated the lenght of L1 and L2 And after that i calculated the volume of the port.
Joe X Posted October 30, 2015 Report Posted October 30, 2015 having a common wall functionally extends the port length (which lowers tuning) as compared with the same port without a common wall, so you build the slot port short (which increases tuning) to land your desired tuning.
nahinder Posted October 30, 2015 Author Report Posted October 30, 2015 Okay so if i understand correctly when you bend a port the sub acts like there is a longer port and my new calculation would looks like this. Width of Port: 7.19CM Length of Port: 94.7CM Port length corrected: 94.7 - (7.19/2) = 91.105 CM L1: 29 - 7.19 = 21.81 L2: 91.105 - (2x3.595) - 1.8 - 21.81 = 60.305 Volume would be: L1: 29 x 33.8 x 8.99 = 8811.998 L2: 60.305 x 8.99 x 33.8 = 18324.39797 8811.998 + 18324.39797 = 27.13639591 Liters Netto Volume: 56 Port Volume: 27.14 Sub Volume: 3 Maximum Dimensions: (CM) H: 29 W: 100 D1: 41 D2: 32 Needed Gross volume: 56 + 27.14 + 3 = 86.14L Available Volume: 80.56L 86.14 - 80.56 = 5.58 L Short So what are my options now ? Double ported ? (will this decrease port volume ?) Or do port outside ?
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