1point21gigawatts Posted October 13, 2020 Report Share Posted October 13, 2020 4 hours ago, SNYPER said: ok this is what ive come up with, the port L=29 1/4 W=2 1/8 H=16 1/2 per port combined center outlet width of 4 1/4 with addition of corner angle pieces and center port V for airflow. and thickness of material 3/4 birch possibly to cut weight? What’s the net volume of that enclosure itself?And is it 16.5” tall not including the top baffle? “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...
SNYPER Posted October 13, 2020 Author Report Share Posted October 13, 2020 thats not including the top or bottom 3/4 so finished height top to bottom would be 18 Link to comment Share on other sites More sharing options...
1point21gigawatts Posted October 13, 2020 Report Share Posted October 13, 2020 But there’s a bottom piece in the diagram. Make sure that 18” is correct and it isn’t 17.25”. Plus, what’s the net volume? “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...
SNYPER Posted October 13, 2020 Author Report Share Posted October 13, 2020 No it’s not if you zoom on the pic you can see the 3/4 gap from side piece to bottom piece, what I did was take the recommended box sundown provided 2 years ago, lowered the height 2 1/4 inches, raised the width 2 inches and the depth (front to back). 1/4 inch. I’m a contractor 25 + yes so the build is easy for me it’s the port/tuning I have issues with. from what I’m adding up it’s 2.527 cubic ft per side not including port should I revise it to get 2.7 per side for the .2 displacement of speakers? If I add 1 inch to depth it’ll take it to 2.77 cu ft per side Total 5.54 Link to comment Share on other sites More sharing options...
1point21gigawatts Posted October 13, 2020 Report Share Posted October 13, 2020 It needs bracing. The more an enclosure flexes the less output that enclosure produces. At that amount of rms it is mandatory to brace that enclosure. Make sure after the displacements that the volume is 5.5 cu. ft. Other than that, it looks good. “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...
SNYPER Posted October 13, 2020 Author Report Share Posted October 13, 2020 Yeah I planned on putting a vertical and horizontal en each, yeah will do tho I’ll def make sure it’s 5.5, but otherwise port looks right? appreciate the help! Link to comment Share on other sites More sharing options...
SNYPER Posted October 14, 2020 Author Report Share Posted October 14, 2020 Actually just thought of this, if I increase the depth an inch to get the additional cu ft, should I now take an inch off port length? Link to comment Share on other sites More sharing options...
1point21gigawatts Posted October 14, 2020 Report Share Posted October 14, 2020 When the volume of the enclosure changes then the port changes. But what you said about adding an inch to the length of the enclosure doesn’t mean you have to take off an inch from the port length. It’s more complex than that. But you would have to increase the initial port back an inch to compensate for the added length so them 2 separate port walls in the back (port walls 2) have a combined width to match the initial port (port wall 1) width. Then you would have adjust the port length accordingly. I’m about to message you so I can speak to you better on the phone so you can build a correct spec enclosure. “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...
SNYPER Posted October 15, 2020 Author Report Share Posted October 15, 2020 when i lowered and widened the box 2 inches i also widened the rear port walls by 1 inch each to compensate,i shouldnt do this? and since i was adding another unaccounted for inch to the depth i was going to now subtract that inch from the rear port walls to stay at same cu inch port space.here are the final dimensions w/o subtracting that port length. is this calculator accurate? http://www.mobileinformationlabs.com/HowTo-1Woofer-Box-CAL Port lenth 1.htm If so id be at 2.5 maybe a tad more after displacement and bracing and corners,its calling for 30.96 inches of port with these dimensions im currently at 30.25 Link to comment Share on other sites More sharing options...
CFD Posted October 18, 2020 Report Share Posted October 18, 2020 @1point21gigawatts thnx for watching my video I design quite a few boxes. I'm not bad at it. I cleared up a misconception I had and figured others may have that misconception so I posted about it. Don't act like I'm stupid. I'm not. Box designs I've made since then have been perfectly fine. No need to bash people on here. Link to comment Share on other sites More sharing options...
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