poorfish88 Posted March 18, 2016 Report Share Posted March 18, 2016 Well you are off to a good start, but you did make a few mistakes :-) So in Torres the volume number we care about is "Net Volume", yours is showing 1.69, you want it to be 2.6, so you need the box to be bigger. You can probably shrink your port area down a little bit, which will let you shorten your port while keeping tuning the same. If you narrow the port from 3.3" down to 3" that should be fine. Also you will want to change the "# of port common walls" to three, since that's how you have the box laid out in your picture. Your sub displacement value should be .08 since you have two subs that displace .04 each. If you would like to do a middle port like you have in your drawing you don't need to have a divider down the middle. You would just make the port 3" wide and then split it into two 1.5" wide ports where it hits the back of the box. In his box drawing it's 2 common walls not 3 Link to comment Share on other sites More sharing options...
Joe X Posted March 18, 2016 Report Share Posted March 18, 2016 Right 2 common walls (top and bottom), also OP you need to clear the "desired gross volume" field or the program will ignore the external dimensions you have given. Link to comment Share on other sites More sharing options...
baller95 Posted March 18, 2016 Author Report Share Posted March 18, 2016 Well you are off to a good start, but you did make a few mistakes :-) So in Torres the volume number we care about is "Net Volume", yours is showing 1.69, you want it to be 2.6, so you need the box to be bigger. You can probably shrink your port area down a little bit, which will let you shorten your port while keeping tuning the same. If you narrow the port from 3.3" down to 3" that should be fine. Also you will want to change the "# of port common walls" to three, since that's how you have the box laid out in your picture. Your sub displacement value should be .08 since you have two subs that displace .04 each. If you would like to do a middle port like you have in your drawing you don't need to have a divider down the middle. You would just make the port 3" wide and then split it into two 1.5" wide ports where it hits the back of the box. In his box drawing it's 2 common walls not 3 Right 2 common walls (top and bottom), also OP you need to clear the "desired gross volume" field or the program will ignore the external dimensions you have given. Sorry if my crappy picture isn't clear but this is exactly what I'm going for - Link to comment Share on other sites More sharing options...
baller95 Posted March 18, 2016 Author Report Share Posted March 18, 2016 I decided that design since I thought it was easier but if you guys can think of a more easier/efficient way to do with with subs facing up and port facing forward, let me know Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted March 19, 2016 Report Share Posted March 19, 2016 In his box drawing it's 2 common walls not 3 Right 2 common walls (top and bottom), also OP you need to clear the "desired gross volume" field or the program will ignore the external dimensions you have given. Once he splits the port in two its a 3 common wall port. If the middle port didn't extend all the way to the back wall it would be a two common wall port. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted March 19, 2016 Report Share Posted March 19, 2016 I decided that design since I thought it was easier but if you guys can think of a more easier/efficient way to do with with subs facing up and port facing forward, let me know The most efficient use of space with a slot port box is a single side port. You can face the port which ever direction you would like, facing back or facing up are probably your two best choices. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
baller95 Posted March 19, 2016 Author Report Share Posted March 19, 2016 I decided that design since I thought it was easier but if you guys can think of a more easier/efficient way to do with with subs facing up and port facing forward, let me know The most efficient use of space with a slot port box is a single side port. You can face the port which ever direction you would like, facing back or facing up are probably your two best choices. Thanks! I'm not sure why I didn't think of that. Definately seems like the best option. Ah the options, too many options! :/When I have some time I'll start from scratch and try designing a box with two subs and one side port. Link to comment Share on other sites More sharing options...
baller95 Posted March 21, 2016 Author Report Share Posted March 21, 2016 Quick question guys. My subwoofer spec sheet recommends 0.75-1.3 cu ft for net internal volume. Since I have two subs, I want 2.6 cu ft. Now is that number (2.6) including the port volume or is it the box without port volume? Link to comment Share on other sites More sharing options...
ShadeTreeMechanic Posted March 21, 2016 Report Share Posted March 21, 2016 The port volume and driver displacement will subtract from the volume so the overall size will need to be bigger to account for this. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted March 21, 2016 Report Share Posted March 21, 2016 Net volume is the empty space thats left after you account for everything else that inside the box, this includes the space the sub takes up, the port, and any bracing. For example if you had a box that had internal dimensions 12" x 12" x 24", it would have 2 cu ft of gross volume. Lets say the sub takes up .1 cu ft, the port takes up .45 cu ft, and bracing takes up .05 cu ft. The net volume would be 1.4 cu ft. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
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