CleanSierra Posted December 14, 2012 Report Share Posted December 14, 2012 Drop depth to 16" with 2 4" PVC ports at 20" Iength. Your displacement is wrong also, for 2 10" Type R's you'll want .14 cubes displaced. Anyway with changing those numbers, you'll have 10.87 square inches per foot, 34.83Hz tune, and 2.31 cubic feet after displacements. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
One Way Posted December 14, 2012 Author Report Share Posted December 14, 2012 So is what ray recommended wrong? I was purely going off what he told me T-line build- http://www.stevemead...e-t-line-build/ Link to comment Share on other sites More sharing options...
CleanSierra Posted December 14, 2012 Report Share Posted December 14, 2012 I don't know the context in which Ray was speaking, but he's never wrong. I bet he was referring to a slot port with that 13" per foot number. 1.5 cubes per sub would help for a flat response curve which might be why he suggested it. 2.5 cubes would probably work well too though. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
CleanSierra Posted December 14, 2012 Report Share Posted December 14, 2012 P.S. you can play with depth a little to get 2.5 cubes and still be fine on square inches per foot for port. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
taylorpro Posted December 14, 2012 Report Share Posted December 14, 2012 dont ever use round ports if they aren't flared. that idea shoudnt even exist. lol. the ONLY reason you use aero's is for gained efficiency and you lose that without the flare 1999 Ford ExplorerTeam Sundown Audio4th 2012 Db Drag WF Street Stock 150.8dbYoutube Channel!http://www.youtube.com/user/BoomyurblownOperation 156 No wall Build Log!http://www.stevemead...x/#entry2196123 Link to comment Share on other sites More sharing options...
One Way Posted December 14, 2012 Author Report Share Posted December 14, 2012 I don't know the context in which Ray was speaking, but he's never wrong. I bet he was referring to a slot port with that 13" per foot number. 1.5 cubes per sub would help for a flat response curve which might be why he suggested it. 2.5 cubes would probably work well too though. yeah he was referring to a slot port but i figured i would try an aero and just minimize the port area since its not the same as a slot port. this is my dumbass trying to do a 4th order lol good thing he set me straight.---> http://www.stevemeadedesigns.com/board/topic/141227-4th-order-frequency-bandwidth/ @taylorpro.... of course i was going to use a flared port i wouldnt just stick a piece of pvc pipe in there lol T-line build- http://www.stevemead...e-t-line-build/ Link to comment Share on other sites More sharing options...
CleanSierra Posted December 14, 2012 Report Share Posted December 14, 2012 dont ever use round ports if they aren't flared. that idea shoudnt even exist. lol. the ONLY reason you use aero's is for gained efficiency and you lose that without the flare I'll have to let my 2 10s in the isobaric push/pull that flared ports are the only ones that work. They sure aren't aware of it and I get no port noise, and plenty of efficiency and output. Flares on a port are only good for a slight SPL gain typically. Flares aren't necessary but can help. Air is not water, it doesn't move like that in a subwoofer enclosure. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
taylorpro Posted December 14, 2012 Report Share Posted December 14, 2012 dont ever use round ports if they aren't flared. that idea shoudnt even exist. lol. the ONLY reason you use aero's is for gained efficiency and you lose that without the flare I'll have to let my 2 10s in the isobaric push/pull that flared ports are the only ones that work. They sure aren't aware of it and I get no port noise, and plenty of efficiency and output. Flares on a port are only good for a slight SPL gain typically. Flares aren't necessary but can help. Air is not water, it doesn't move like that in a subwoofer enclosure. i should have been more careful in how i worded that. If you try to use port area figures such that you would with flared aero's, and don't use the flare's, in a typical ported box where the port is facing an exterior side of the box, port noise is very possible to be heard. Now if you still have a bunch of port then it won't be an issue. But I also see people generalize that since you can get away with 7-9" of port per cube with aero's, than you can just slap a piece of PVC tube in it and get the same results. Knowing that the flares on the aeros are probabl the biggest reason WHY you can get away with less is important 1999 Ford ExplorerTeam Sundown Audio4th 2012 Db Drag WF Street Stock 150.8dbYoutube Channel!http://www.youtube.com/user/BoomyurblownOperation 156 No wall Build Log!http://www.stevemead...x/#entry2196123 Link to comment Share on other sites More sharing options...
One Way Posted January 10, 2013 Author Report Share Posted January 10, 2013 I forgot about this thread.... well out of impulse I just did a normal slotted box.... hits pretty decent. only got a few pics.... Theres my cuteass T-line build- http://www.stevemead...e-t-line-build/ Link to comment Share on other sites More sharing options...
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