Jonathan91v8 Posted August 13, 2020 Report Share Posted August 13, 2020 Im planning on doing a 4th order using a aero port. I have 3 sa12s wired at .67. Sealed is 3cuft and ported is 8.5. Box is build already, i just need to cut the front hole. How much port area should aero ports be in 4th orders? Link to comment Share on other sites More sharing options...
1point21gigawatts Posted August 13, 2020 Report Share Posted August 13, 2020 Anywhere from 136-170 square inches of port area. 16-20sq” per cubic foot of the ported section. What kind of amp? If I know that, then I can narrow the port area down. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.” Link to comment Share on other sites More sharing options...
Jonathan91v8 Posted August 13, 2020 Author Report Share Posted August 13, 2020 Isnt that with a normal 4th order square port? I heard aero ports required less port area than regular square ports. Its a taramps 3k. Ima have it to 3k rms. Link to comment Share on other sites More sharing options...
Jonathan91v8 Posted August 13, 2020 Author Report Share Posted August 13, 2020 Anyone? Link to comment Share on other sites More sharing options...
1point21gigawatts Posted August 14, 2020 Report Share Posted August 14, 2020 I just noticed you said aero ports. I must have over read that. But that doesn’t matter. On 4th order enclosures, there isn’t any aero port short cuts and using less port area like on regular enclosures. Any less port area doesn’t make bandwidth better like it does with regular enclosures, on 4th order enclosures using less port area minimizes output. A 4th order enclosure already has awesome bandwidth. You have to understand how the 2 sections work. You would have to use a 14 inch concrete tube to equal the port area needed for that enclosure and it’s not smart to use multiple aero ports on any application if you are thinking of that. So no, you can’t hit up any aero port companies to fulfill your needs on that particular enclosure build. And in aero ports 6+6 doesn’t equal 12, if you didn’t already know. And if you don’t want to use a 14” concrete tube, then do a square port 12”x12”(inner port measurements, NOT OUTER)=144sq” of port area. Or 11”x13” or 10”x14”. But no further apart than that in reference from straying away from a square shape. Closer to a square, the better. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.” Link to comment Share on other sites More sharing options...
1point21gigawatts Posted August 14, 2020 Report Share Posted August 14, 2020 And since there isn’t flares on concrete tubes, you can’t use regular aero port calculators. You have to use a round port calculator. Because each flare adds an inch. Either port configuration you choose, this calculator would help you. https://www.the12volt.com/caraudio/boxcalcs.asp And if you do use a 14” concrete tube, remember that the port diameter isn’t actually 14”, it’s like 13.5”. The port would have to be about 12.5” long. That would tune it at 45hz. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.” Link to comment Share on other sites More sharing options...
1point21gigawatts Posted August 14, 2020 Report Share Posted August 14, 2020 The aero port theory or formula or whatever you wanna define it as, doesn’t apply to bandpass enclosure’s front sections. And since it’s a 4th order bandpass enclosure, the front section is the only ported section. So the aero port formula doesn’t apply to a 4th order enclosure even if using an aero port. The front section always has to have a lot of port area, no matter the type or shape of the port you use on it. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.” Link to comment Share on other sites More sharing options...
Jonathan91v8 Posted August 14, 2020 Author Report Share Posted August 14, 2020 Nice. Ok ill rather go for the square hole. What would be the bigget port area i can have? Link to comment Share on other sites More sharing options...
1point21gigawatts Posted August 14, 2020 Report Share Posted August 14, 2020 On that minimum rms you don’t want too big of a port area because it too would minimize the output. Tell me the measurements of the front board where the port goes. Don’t include the measurements of the surrounding boards if any of them overlap that board to add 0.75”. What are the measurement of the front board when drew up a cut sheet for that enclosure and cut that front board? So I know what the measurements of the port can be. “How can we help you?” “And don’t forget to tell them that the customer isn’t always right.” Link to comment Share on other sites More sharing options...
Jonathan91v8 Posted August 14, 2020 Author Report Share Posted August 14, 2020 The board where the port hole will be at is 17.5 tall and 48.5 wide. Its 19 total tall and 50 total wide Link to comment Share on other sites More sharing options...
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