Skarbo98 Posted February 19, 2019 Report Share Posted February 19, 2019 Hey guys! New to the forum but i have been lurking around for a long while :)  i now have a GZPW Limited 555 12" subwoofer that have a 80L ported box reccomended, but my box is only 50L and the subwoofer can barely fit inside the box..😅  The subwoofer is not happy with the box.. Any tips? Will it help to turn my subwoofer around and mount it with the magnet outside of the box? Link to comment Share on other sites More sharing options...
Joshdashef Posted February 19, 2019 Report Share Posted February 19, 2019 Mounting a sub inverted or magnet out is only used to give the box some more net volume since the displacements of the sub and magnets etc. will no longer be taken away from the net volume its possible you may need a new box entirely. From my understanding a box within spec allows for rated power while a larger than spec box needs less power and a smaller than spec box needs more power also the sub should have some room behind it to perform properly, how much depends on the sub so in short try it mounted inverted and see if that helps if not get a bigger box also is this 50L box Ported or sealed ? Sealed volume specs on subs are often smaller than ported. SMD Tool Map (2022): https://www.stevemeadedesigns.com/board/topic/220267-smd-tool-map-2022/ My Port Size Calculator (in progress): https://www.stevemeadedesigns.com/board/topic/217087-port-size-calculator-in-progress/ Common Port Walls for a Slot Port: https://www.stevemeadedesigns.com/board/topic/217076-common-port-walls-why-it-matters-to-your-box/?tab=comments#comment-3240313  Link to comment Share on other sites More sharing options...
Skarbo98 Posted February 19, 2019 Author Report Share Posted February 19, 2019 5 minutes ago, Joshdashef said: Mounting a sub inverted or magnet out is only used to give the box some more net volume since the displacements of the sub and magnets etc. will no longer be taken away from the net volume its possible you may need a new box entirely. From my understanding a box within spec allows for rated power while a larger than spec box needs less power and a smaller than spec box needs more power also the sub should have some room behind it to perform properly, how much depends on the sub so in short try it mounted inverted and see if that helps if not get a bigger box also is this 50L box Ported or sealed ? Sealed volume specs on subs are often smaller than ported.  Thank you for the response the 50L box is with a 4" port  i just bought a new car (BMW e87) and my old box was WAY too big for the little trunk. So i just bought a box thinking it was ok. I'm thinking of building a new box Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted February 19, 2019 Report Share Posted February 19, 2019 Depending on how much power you are running a single 4" port is WAY too little port area for a 12" sub.  I'd suggest building a new box that is the proper specs for your sub. "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...
Skarbo98 Posted February 20, 2019 Author Report Share Posted February 20, 2019 6 hours ago, Triticum Agricolam said: Depending on how much power you are running a single 4" port is WAY too little port area for a 12" sub.  I'd suggest building a new box that is the proper specs for your sub. Pushing it with 5k @1ohm Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted February 20, 2019 Report Share Posted February 20, 2019 35 minutes ago, Skarbo98 said: Pushing it with 5k @1ohm Yeah, a single 4" port is way, WAY too small for the power you are running. A 4" port would be appropriate up to about 350 watts, not 5K.  "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...
Skarbo98 Posted February 20, 2019 Author Report Share Posted February 20, 2019 2 hours ago, Triticum Agricolam said: Yeah, a single 4" port is way, WAY too small for the power you are running. A 4" port would be appropriate up to about 350 watts, not 5K.  Haha shit okay Any recomendations? Have no clue about the box design or anything.. and the amp is HUGE + i have a extra battery i need to fit in the trunk..  Any help is apriciated! Link to comment Share on other sites More sharing options...
k58.cross Posted February 20, 2019 Report Share Posted February 20, 2019 That is an insane sub man. 3 kW rms right? 50 liters is only 1.77 cubic feet, wayyyyy too small for that kind of power. Custom box build definitely. You might want like 3 extra batteries... Research your butt off and do this build properly, that's a lot of power to be playing around with. Link to comment Share on other sites More sharing options...
Skarbo98 Posted February 20, 2019 Author Report Share Posted February 20, 2019 5 hours ago, k58.cross said: That is an insane sub man. 3 kW rms right? 50 liters is only 1.77 cubic feet, wayyyyy too small for that kind of power. Custom box build definitely. You might want like 3 extra batteries... Research your butt off and do this build properly, that's a lot of power to be playing around with. Thanks i have a 98ah battery, and i have a 370A stinger alternator laying around that i will consider to hook up if needed. yeah 3kw rms, but i'm giving it 5k atm! Thinking if it blows i'll just buy the gzpw 12spl  You know anyone who can make a drawing of a box for me?.. i am clueless on those programs😅 Link to comment Share on other sites More sharing options...
k58.cross Posted February 20, 2019 Report Share Posted February 20, 2019 It looks fun actually and I'd try to model it, but I can't find all the t-s params for the 555 model. Do you have them? I can find the SPL model specs easily though. Link to comment Share on other sites More sharing options...
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