IKnowImLost224 Posted March 7, 2012 Report Share Posted March 7, 2012 (edited) So I made this box before I knew about port area per cube Now knowing that the box sounds like ass because the port is wayyy to small I redisigned a box at about max specs for my trunk and I wanna see what you guys think. I don't know why its showing up so small. Also why is it not giving me a complete cutsheet? I don't have cuts for the port Edited March 7, 2012 by IKnowImLost224 Quote Link to comment Share on other sites More sharing options...
IKnowImLost224 Posted March 7, 2012 Author Report Share Posted March 7, 2012 Quote Link to comment Share on other sites More sharing options...
Joe X Posted March 7, 2012 Report Share Posted March 7, 2012 Whatever you do go front firing or backfiring ports/subs From the screenshot I would suggest to make a double baffle with this subwoofer, place a "1" on the "# of extra baffles" box, also your net volume is below 4 cubic feet that RE Audio suggests. To get the port parts you need to look at the physical port length box on the Torres and do some calculations or measure the length of the port along its centerline which in your case is 2" . Quote Link to comment Share on other sites More sharing options...
IKnowImLost224 Posted March 7, 2012 Author Report Share Posted March 7, 2012 Whatever you do go front firing or backfiring ports/subs From the screenshot I would suggest to make a double baffle with this subwoofer, place a "1" on the "# of extra baffles" box, also your net volume is below 4 cubic feet that RE Audio suggests. To get the port parts you need to look at the physical port length box on the Torres and do some calculations or measure the length of the port along its centerline which in your case is 2" . I did end up changing the baffle. I won't have the room to make the RE "Optimum" box. So I am trying to stay between the Optimum and Compact. Quote Link to comment Share on other sites More sharing options...
IKnowImLost224 Posted March 7, 2012 Author Report Share Posted March 7, 2012 Also, I am going sub/port towards trunk rear Quote Link to comment Share on other sites More sharing options...
Lbox88 Posted March 7, 2012 Report Share Posted March 7, 2012 Looks good to me. Quote UBL | Build Log Link to comment Share on other sites More sharing options...
Joe X Posted March 7, 2012 Report Share Posted March 7, 2012 I understand, port/sub backfirig is fine, I can rework my previous suggestion for you or you can go ahead and make your own spec. If you are unsure of the port parts length post them and I can check them. Quote Link to comment Share on other sites More sharing options...
Decaf Posted March 7, 2012 Report Share Posted March 7, 2012 Its not about Port Area/Cubic foot... its about volume displacement/power/desired f3 Vd=xmax*sd... so the more the subs move the more port you need. Sd should be used when comparing woofer size setups, not area of a circle The more power you apply the more notes the sub will be closer to xmax thus needing a bigger port. This is also why on low power you can get away with smaller ports. So long as volume/tuning remain the same a smaller port will have a lower f3(becuase the smaller port is able to maintain backpressure/cone control) compared to a larger port. A larger port will have more of a peak in response Quote Link to comment Share on other sites More sharing options...
IKnowImLost224 Posted March 8, 2012 Author Report Share Posted March 8, 2012 Decaf, I kind of understand what your saying but not sure I have a complete grasp of it. Can you give me an example? I'm using the RE XXX 15" powered by a sundown SAZ-2500D at just over half gain Quote Link to comment Share on other sites More sharing options...
Lbox88 Posted March 8, 2012 Report Share Posted March 8, 2012 Its not about Port Area/Cubic foot... its about volume displacement/power/desired f3 Vd=xmax*sd... so the more the subs move the more port you need. Sd should be used when comparing woofer size setups, not area of a circle The more power you apply the more notes the sub will be closer to xmax thus needing a bigger port. This is also why on low power you can get away with smaller ports. So long as volume/tuning remain the same a smaller port will have a lower f3(becuase the smaller port is able to maintain backpressure/cone control) compared to a larger port. A larger port will have more of a peak in response It's late where I'm at and this gave me a little bit of a headache when i read it Quote UBL | Build Log Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.