ranio Posted October 23, 2011 Report Share Posted October 23, 2011 Hey all, Ok before I start I will just say, yes I know this is not a true grounder but its my 1st go at going low! Setup: sedan, miniwall styled (yet to sealed) 5.6 cube gross box, 34hz tuning, 21"square inch of port per cube. Dual 12" Option Audio xtms on 3k power. I am hitting 138.6 @25hz, 139.7 @33hz and 140.3 @40hz! all sealed on dash Now my issue is, I know my port is too big as it is and thought if I reverse mount the subs that will drop the port tuning to 29-30hz and lower the port area to about 15.8" per cube. I want to hit numbers under the 40hz mark and have asked numerous people, with no real help, will reverse mounting to lower port area and lower tuning help raise my spl score under 40hz? if there's anything else you need to know just ask, Thanks guys Quote Link to comment Share on other sites More sharing options...
Sanitarium Posted October 23, 2011 Report Share Posted October 23, 2011 Hey all, Ok before I start I will just say, yes I know this is not a true grounder but its my 1st go at going low! Setup: sedan, miniwall styled (yet to sealed) 5.6 cube gross box, 34hz tuning, 21"square inch of port per cube. Dual 12" Option Audio xtms on 3k power. I am hitting 138.6 @25hz, 139.7 @33hz and 140.3 @40hz! all sealed on dash Now my issue is, I know my port is too big as it is and thought if I reverse mount the subs that will drop the port tuning to 29-30hz and lower the port area to about 15.8" per cube. I want to hit numbers under the 40hz mark and have asked numerous people, with no real help, will reverse mounting to lower port area and lower tuning help raise my spl score under 40hz? if there's anything else you need to know just ask, Thanks guys I want you to tell me how reverseing a sub, mounted nowhere near the port, lowers port AREA. I see it lowering port ratio, but in the end the port area per square inch of cone remains the same and you're pissing into the wind. All you're effectively doing is lowering tuning slightly by removing some of the box's displacement. Quote Link to comment Share on other sites More sharing options...
ranio Posted October 23, 2011 Author Report Share Posted October 23, 2011 I am probably wrong (which is why im here asking) wouldn't reversing the subs give back the 1cube displacement from the subs which would mean more cube per port square inch? this is just playin around in Torres' Box Tuning Calculator. Quote Link to comment Share on other sites More sharing options...
KillaCam Posted October 23, 2011 Report Share Posted October 23, 2011 I am probably wrong (which is why im here asking) wouldn't reversing the subs give back the 1cube displacement from the subs which would mean more cube per port square inch? this is just playin around in Torres' Box Tuning Calculator. It would give you more box area, I don't think a whole cube. No it does not give you more port area, I mean you dont have the subs in the port do you?? Basically inverting the subs is not going to make a very noticeable difference besides the looks. Quote And the fact more than one person agrees does not make it a circle jerk, it makes it a bukkake scene and you're in the middle Chick took 3 shots of Jager, and then, pissed in my mouth.. B5 Passat Build Log Link to comment Share on other sites More sharing options...
ranio Posted October 23, 2011 Author Report Share Posted October 23, 2011 (edited) I am probably wrong (which is why im here asking) wouldn't reversing the subs give back the 1cube displacement from the subs which would mean more cube per port square inch? this is just playin around in Torres' Box Tuning Calculator. It would give you more box area, I don't think a whole cube. No it does not give you more port area, I mean you dont have the subs in the port do you?? Basically inverting the subs is not going to make a very noticeable difference besides the looks. sorry I know it wont give me more port area, I was referring to the port to box ratio, as I have 21 square inches of port per foot cube of box volume. the sub are just under .5ft3 in displacement each, reverse mounting would give back the displacement which means the port to box ratio would change, thats what I was wondering about. Edited October 23, 2011 by ranio Quote Link to comment Share on other sites More sharing options...
Sanitarium Posted October 23, 2011 Report Share Posted October 23, 2011 I am probably wrong (which is why im here asking) wouldn't reversing the subs give back the 1cube displacement from the subs which would mean more cube per port square inch? this is just playin around in Torres' Box Tuning Calculator. yes it will give you more cubes per port square inch, not less port area total. Just flip em over, like i said you'll be dropping tuning some, which may or may not help you toward your goal. Quote Link to comment Share on other sites More sharing options...
ranio Posted October 23, 2011 Author Report Share Posted October 23, 2011 righto, I'll flip em over and get some termlab time and see what difference it makes. thanks guys Quote Link to comment Share on other sites More sharing options...
taylorpro Posted October 23, 2011 Report Share Posted October 23, 2011 what subs are you using? ive never seen a single sub take up half a cube... Quote 1999 Ford ExplorerTeam Sundown Audio4th 2012 Db Drag WF Street Stock 150.8dbYoutube Channel!http://www.youtube.com/user/BoomyurblownOperation 156 No wall Build Log!http://www.stevemead...x/#entry2196123 Link to comment Share on other sites More sharing options...
Supercharged DCs Posted October 24, 2011 Report Share Posted October 24, 2011 My two DC Lv5 18s took up .52cubes together, and those were some huge motherfockers lol. I don't see a single woofer taking up that much space... Quote Bassless once again. Can't seem to keep a system for more than a few weeks Saving for a '06 Nissan 350z, look for build around June 2012. Link to comment Share on other sites More sharing options...
bassahaulic Posted October 24, 2011 Report Share Posted October 24, 2011 sorry I know it wont give me more port area, I was referring to the port to box ratio, as I have 21 square inches of port per foot cube of box volume. the sub are just under .5ft3 in displacement each, reverse mounting would give back the displacement which means the port to box ratio would change, thats what I was wondering about. Nothing wrong with that. Quote Link to comment Share on other sites More sharing options...
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