TnPraiseWaves Posted June 25, 2016 Report Share Posted June 25, 2016 I'm building a 3 18s 2.5:1 ratio 4th order its 24 ported and 9 sealed I've got the port tuned to 48.5 making my gain chart in winISD read -3dB=27.79Hz&84.65Hz 0dB=30.33Hz&77.47Hz (Peak)11dB=45.54-51.07Hz Is this a good tuning, I'm new to 4ths and big builds and winISD Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted June 25, 2016 Report Share Posted June 25, 2016 What subs? What amp? What vehicle? "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...
TnPraiseWaves Posted June 25, 2016 Author Report Share Posted June 25, 2016 3 PSI platform 2 18 1800 watts one Crescendo 5500 monoblock and it's in a 02 Jeep Liberty Link to comment Share on other sites More sharing options...
TnPraiseWaves Posted June 25, 2016 Author Report Share Posted June 25, 2016 Keyword is building not built so I'm still working on it, I've got pictures of all the project so far in my garage an here's a link to my Forum on the12volt if you want to check it out http://www.the12volt.com/installbay/forum_postsm.asp?tid=141326&kw=praisewaves Link to comment Share on other sites More sharing options...
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