john253a Posted April 25, 2012 Report Share Posted April 25, 2012 (edited) sa8v1.5 on 400wrms each in trunk facing rear/pord drivers side all in 3/4, does in need more bracing or maybe in different places? thinking of 3/4 round from front wall to port wall? is it worth kerfing the port on one side between subs to port Edited April 25, 2012 by john253a Quote Link to comment Share on other sites More sharing options...
john253a Posted April 25, 2012 Author Report Share Posted April 25, 2012 i currently have them in this box, with no bracing/ no smoothed or radiused port or double front and i'm reasonable happy,(built it as a test box for tune and port size) just looking to optimize its performance a bit, the above measurements may look a bit strange on new box but there a combination on metric and imperial Quote Link to comment Share on other sites More sharing options...
john253a Posted April 25, 2012 Author Report Share Posted April 25, 2012 (edited) is it a bit to peeky or should i shoot for smoething like theise all are modled on 2 drivers Edited April 25, 2012 by john253a Quote Link to comment Share on other sites More sharing options...
john253a Posted April 26, 2012 Author Report Share Posted April 26, 2012 No ran 2 sa8 in 0.25each ported for a flat response that can comment Quote Link to comment Share on other sites More sharing options...
Joe X Posted April 26, 2012 Report Share Posted April 26, 2012 WinISD does not factor in car cabin gain, so it would be hard to predict a true flat resopnse from those curves. Sealed typically gives a fair flat response in cars since the rollof of sealed cancells out cabin gain, 4th orders, can be setup to give a flat response (around 1:1) up to about the tuning frequency of the ported chamber. In ported mainly you can avoid the enclosure to peak in many ways including lowering the net volume and properly tuning BUT will loose output. A parametric EQ is another way to tweak response. Quote Link to comment Share on other sites More sharing options...
john253a Posted April 26, 2012 Author Report Share Posted April 26, 2012 (edited) The only 8"s ive ever had were sealed, used as low/mid drivers(lowpass 160/ highpass 80 on a 24db slop in conjunction with 15"s) most of the box ive build were for 12 and 15 all around 3db peek in the mid 30's and then flatten out around 0-1db@ low 40hz What ive been recommended for these in 1.5net @34hz, low pass the rca's at 160hz on 24db slop then set amp to 125hz/6db slop with 14sqin port each sub but it seem a bit peaky to me? any thought on if that sounds right? or should i change it around a bit Edited April 26, 2012 by john253a Quote Link to comment Share on other sites More sharing options...
HypnotizedMind 91666 Posted April 26, 2012 Report Share Posted April 26, 2012 the 0.7 / 33hz Quote in a million, trillion, kabillion years,i would never play that song in my ride. I don't care if its clipped or not LOL. I feel like my nads got clipped after playing this for 15 seconds just to see what it was LOL. No thanks bro. Not into it. Link to comment Share on other sites More sharing options...
john253a Posted April 26, 2012 Author Report Share Posted April 26, 2012 (edited) each or 2 edit if each i can just extend port to achieve that but then ill have around 19sqin per cuft and thoughts on port, considering ive been told 14sq each Edited April 26, 2012 by john253a Quote Link to comment Share on other sites More sharing options...
Noobtastic14 Posted April 26, 2012 Report Share Posted April 26, 2012 If you build the box right and your panel seams are strong you will not need any bracing. You also will not need a double baffle. I suggest a nice birch ply but the classic MDF works as well. The model shows the "peaky" model still the loudest at 30hz which seems like a winner to me. You have 8s, flat means very low output unless you get it to peak where you want it to play. Quote I am a United States Military Arts and Crafts Professional. Sand it off, Paint it on. uhoh_45 said: dont be a pussy P give the jeep to drew Link to comment Share on other sites More sharing options...
john253a Posted April 26, 2012 Author Report Share Posted April 26, 2012 my current box is 1.5 @33hz 27sqin of port, plane Jane box, no extras and i was looking at 1.5 @34.5 29sqin port double brace, rounded corners, with possible flared/kerfing to port exit Quote Link to comment Share on other sites More sharing options...
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