Bonka Posted June 25, 2017 Author Report Share Posted June 25, 2017 I'm trying to keep the box at this size so I actually have some of my trunk to use unlike my last car and build. What would you suggest? I also did not take in to account the amp being fused at 60amps cutting its output. It supposedly does 1100 at 1ohm but those are just specs. Link to comment Share on other sites More sharing options...
Jessica Posted June 25, 2017 Report Share Posted June 25, 2017 its probably fine. its not optimal but its way better than prefab. Might add some bracing, like 1" dowels from the baffle to the back. Thats a fairly large surface for that sub. I usually double baffle. but then you would have to recalculate everything. Rest in peace, walled 87 accord build log 03' Corolla build with AA Mayhem inside. My super random youtube channel and terrible camera work. Wiring comparison by CaptainzPlanetz Wire and fuse guide by Guest SyKo13 Link to comment Share on other sites More sharing options...
Bonka Posted June 25, 2017 Author Report Share Posted June 25, 2017 I could double baffle and just tack on another 3/4" to the box. It'll add to the port length which I can then fix. Shouldn't be huge deal. Link to comment Share on other sites More sharing options...
Bonka Posted June 25, 2017 Author Report Share Posted June 25, 2017 Adding the 3/4" to the front and taking 3/4" off the 2nd port length keeps the same port length and puts me at 1.99 ft^2 and essentially 33hz. The low port volume you mentioned worries me though. Link to comment Share on other sites More sharing options...
Bonka Posted June 25, 2017 Author Report Share Posted June 25, 2017 I recalculated for a 2.25" port slot and 32" port length and came up with 1.85 ft^3 at 34hz with 29.25 in^2 port area. Hopefully I didn't mess anything up there. I think this may be the way to go. Edit: doh. off by .25" internally so have to recalculate all this. Link to comment Share on other sites More sharing options...
Bonka Posted June 25, 2017 Author Report Share Posted June 25, 2017 As dumb luck would have it I had the correct volume even though I was .25" off on one of the internal port sides so I think I'll go with this and see how it turns out. Now I need to pick up some birch to cut. Link to comment Share on other sites More sharing options...
Parker Grundy Posted June 25, 2017 Report Share Posted June 25, 2017 I'm kinda in the same position as you. I need a bunch of my trunk space too. My SSA ICON 12 just shit the bed... AZ HEAT i think. Anyways, I'm getting a nice PSI recone for my icon and a high excursion 15 passive radiator from them. PSI describes it best - Our passive radiators offer a solution for small space and low tuned applications where a ported (vented) enclosure would be optimum, but where space does not allow for the use of a properly sized port opening or port length. Our radiators offer the user the ability to tune their enclosure lower than conventional ported enclosures normally allow for, in less space. To say it simply, A passive radiator takes the place of a port when there’s not enough room for one. If available space is lacking, but you are not willing to give up output or sound quality, a passive radiator may be the perfect option. Passive radiators are recommended to be used as a replacement for a port. You should generally use about the same or slightly less enclosure volume with a PR that you would with a port. PR’s can be used to achieve a low tuning in a moderate or small sized enclosure by adding weight to the rear. The more weight that you add, the lower tuning that you’ll achieve. The only limitation will be the upper tuning frequency. Depending on the size of the PR and the internal volume of the enclosure, there will be a maximum tuning frequency limit. For help with this, please contact us directly. I'm guessing that the normal 15in pr will work just fine with the sa12. I used WINisd to model between my old sealed box, a vented box that could possibly be shoved in ma trunk, and a pr box that has a lot mor 20-30hz output and is less peaky. I love them lows, and if I wanna tune it lower, I just need to add more weight to the pr - I modeled the pr and found I like 550 grams extra mass to the cone. Take a couple hours and mess with this software imo. Can be a little tricky, but helped me decide what I wanna do. You can also model 2 12 in passives, see how they would do with the sa12. https://psicaraudio.com/product/15-passive-radiator/ Link to comment Share on other sites More sharing options...
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