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<blockquote data-quote="power-fanatic07" data-source="post: 6893063" data-attributes="member: 587699">Ok well I am about to start my next box for these new 12&#039;s I got. They are custom built using :rd elite spl v2 motorbravox 12&#039;&#039; cast basket 8.5&#039;&#039; landings8 layer aluminum flat wound d1 coils 2&quot; wwdual stiff 8&quot; progressive spiders with stiff leadstc sounds honey comb/ cf cone with highroll surround 8&#039;&#039; poly dustcapI want to try a 4th order. Going to be using about 3k watts, if it ends up sounding good I have another 3k on tap. I have read through a few threads of the design of 4th and 6th orders but I am no pro. These are the dimensions I came up with. 2 cuft sealed, 5.5 cuft ported tuned to (heres where I&#039;m not sure on the tuning, I have seen a few 4th orders where the ported was tuned to upwards of 50hz) So what exactly will I tune the ported side to?&nbsp; I want it to play low...30-35 hz. And how much port area? 12-16 per cuft ? Thanks for any help</blockquote>

[QUOTE="power-fanatic07, post: 6893063, member: 587699"] Ok well I am about to start my next box for these new 12's I got. They are custom built using : rd elite spl v2 motor bravox 12'' cast basket 8.5'' landings 8 layer aluminum flat wound d1 coils 2" ww dual stiff 8" progressive spiders with stiff leads tc sounds honey comb/ cf cone with highroll surround 8'' poly dustcap I want to try a 4th order. Going to be using about 3k watts, if it ends up sounding good I have another 3k on tap. I have read through a few threads of the design of 4th and 6th orders but I am no pro. These are the dimensions I came up with. 2 cuft sealed, 5.5 cuft ported tuned to (heres where I'm not sure on the tuning, I have seen a few 4th orders where the ported was tuned to upwards of 50hz) So what exactly will I tune the ported side to? I want it to play low...30-35 hz. And how much port area? 12-16 per cuft ? Thanks for any help [/QUOTE]

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