Loslam Posted October 27, 2011 Report Share Posted October 27, 2011 Hey guys, I currently have a ported box for two HDC3 18s tuned to 34 hz and it pounds, but we all know you're never done and we all have to be in the middle of a build.... So I decided I want to try my luck at a 4th order bandpass for the first time and see how the box does. I've heard nothing but great things from 4th orders along with the low end response and efficiency. I want it to be a low monster, and it will be going in the back of my extended cab 97 silverado. Here are some pictures just roughly making an idea of IF I have enough room and IF this box looks fine Let me know if this idea of a box would work, or any other ideas for me.... Thanks! Currently around 3ish cubes each sealed and a 12.5ish common chamber ported, 200 sq inches of port and 45 hz Sealed view: Full view: Full view 2: Quote 1997 Chevrolet Silverado Extended Cab, 350 Vortec Things to come at some point... Build Log: http://www.stevemead...2200ds-133-ohm/ Link to comment Share on other sites More sharing options...
Ray Posted October 27, 2011 Report Share Posted October 27, 2011 5 sealed total And 14 ported With 11 sqin per. Tune to 37 Quote 2008 California state record holder 157.2 Bassrace2009 California state record holder 157.0 BassraceRollin 50's 158.7db2009 King of Cali Bassrace2009 USACi score 160.5 @ 42hz Link to comment Share on other sites More sharing options...
fox_racin4 Posted October 27, 2011 Report Share Posted October 27, 2011 Um.... What are your max dems. I know i only got aboutt 23 cubes MAX out of my 98 extd cab chevy. And about 16 cubes after all displscements. Measure it good before you build. Quote 1998 gmc extd cab 12 crossfire C710s 4 SAZ-4500s 3 Singer 400A altsbuncha mids/highs Team Asshole Link to comment Share on other sites More sharing options...
Loslam Posted October 28, 2011 Author Report Share Posted October 28, 2011 5 sealed total And 14 ported With 11 sqin per. Tune to 37 Thanks for the help, Wouldn't tuning to 37 be overkill almost for a 4th order on the lows? Not doubting just questioning. And 5 sealed total, so 2.5ish per 18 or 5 in common chamber? So if this is braced well would this rough design work? Sorry for so many questions lol. many questions -> making the best from one build Quote 1997 Chevrolet Silverado Extended Cab, 350 Vortec Things to come at some point... Build Log: http://www.stevemead...2200ds-133-ohm/ Link to comment Share on other sites More sharing options...
Loslam Posted October 28, 2011 Author Report Share Posted October 28, 2011 5 sealed total And 14 ported With 11 sqin per. Tune to 37 So like this for the ported? Quote 1997 Chevrolet Silverado Extended Cab, 350 Vortec Things to come at some point... Build Log: http://www.stevemead...2200ds-133-ohm/ Link to comment Share on other sites More sharing options...
Ray Posted October 28, 2011 Report Share Posted October 28, 2011 That looks good. 5cuft common chamber. Quote 2008 California state record holder 157.2 Bassrace2009 California state record holder 157.0 BassraceRollin 50's 158.7db2009 King of Cali Bassrace2009 USACi score 160.5 @ 42hz Link to comment Share on other sites More sharing options...
Whothennow Posted October 28, 2011 Report Share Posted October 28, 2011 Don't question ray. Just build it and be happy. Quote Link to comment Share on other sites More sharing options...
bassahaulic Posted October 28, 2011 Report Share Posted October 28, 2011 I've always seen/used 20sqin of port per cube or more. Hmm Quote Link to comment Share on other sites More sharing options...
Loslam Posted October 28, 2011 Author Report Share Posted October 28, 2011 Don't question ray. Just build it and be happy. That's what I plan on lol Quote 1997 Chevrolet Silverado Extended Cab, 350 Vortec Things to come at some point... Build Log: http://www.stevemead...2200ds-133-ohm/ Link to comment Share on other sites More sharing options...
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