srool Posted April 12, 2012 Report Share Posted April 12, 2012 One of my friends had SAZ1500D with 12" Havoc in sealed box. He liked the sound but wanted more power, therefore he bought 2 X12" DC Audio Level 3 m2 with Level 4 soft parts. His amp going to be DC 3.5k. He wants to build a ported box for them. He Has 2 main requests: 1. Be able to play low notes on high volume. Make them noticable 2. Play with accuracy and quallity that wouldn't be a major decrease comparing to the sealed box he had. Stay musical. I thought about tuning it to 30-32HZ with port area of 12-14 sqare inches per 1 cubic feet, but I might be in wrong directions. Any thoughts ? Quote Link to comment Share on other sites More sharing options...
banginHOE Posted April 13, 2012 Report Share Posted April 13, 2012 1st. How large will the enclosure be ? 3.5k is a lot of power for lvl3's. 2nd if you tune in the 30's it should still get pretty low and do well in the mid range. My current enclosure is tuned to 29hz and I full tilt in the low 20's no problem without stressing the subs out. And my sealed up peak is 40hz. Quote 8 SSA EVIL 15's 4 CRESCENDO 5500'S 2 SINGER HAIRPIN'S 21 XS POWER D1600'S ALL MCLAREN AUDIO MID'S AND TWEETERS 1 TARAMPS HD4000, 1 TARAMPS HD800 SEX! Link to comment Share on other sites More sharing options...
CJ18 Posted April 13, 2012 Report Share Posted April 13, 2012 The box needs to be small for the much power on level 3s even with the 4 parts. 1ft3 per sub after displacements. I would be in the 13-15in2 per 1ft3 range and you can tune however you want based on the type of music you listen to. Quote Link to comment Share on other sites More sharing options...
srool Posted April 14, 2012 Author Report Share Posted April 14, 2012 Tanks for the replies. I didn't understand yet if 1 cu.ft. includes the port volume or not. And one more thing: when trying to calculate the port specs with WinISD or Bass Box 6 Pro, when tuning low and keeping the port area above 13-14 in^2, I get a very long port considering the box dimensions. It also happened with the box I tried to calculate for my 15" XL. Is this normal? Quote Link to comment Share on other sites More sharing options...
windowtinter Posted April 14, 2012 Report Share Posted April 14, 2012 the 1cube is without port volume added. and yes smaller boxes usually have pretty long ports to get tuning low. Quote Link to comment Share on other sites More sharing options...
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