BassDoctor Posted March 10, 2014 Report Share Posted March 10, 2014 Hey guys. Quick question. What effect, if any, does the location of a subwoofer on the baffle have in a car audio application? Since I've never been the best with explaining questions, I'll do a quick drawing. I am asking this for a ported enclosure particularly, but I'd love to hear about other enclosures as well. Port is not included in the drawing because I did not want to introduce another variable. l----------l is our baffle before subwoofer placement. Placement1= l-----x-----l Center Placement2= l----x------l Placement3= l---x-------l Placement4= l--x--------l Placement5= l-x---------l Placement6= lx----------l Far left I've skimmed through the Loudspeaker Cookbook, where Vance touches up on this, but I'm not sure if things are different when considering the smaller environment and higher power usage in car audio. I'd assume that the sub being closer to the outer wall would have some loading effect, but I do not know enough about loading to be certain. I hope that this question is clear and someone can help 04 Honda Accord LX Sedan Kenwood Excelon X998 XS Power D3400 XS Power D1200 Singer 275A alternator with factory bypass 64 sqft SecondSkin Damplifier Build to be decided Link to comment Share on other sites More sharing options...
boom50cal Posted March 10, 2014 Report Share Posted March 10, 2014 I know port location plays a big role in it. Curious to this as well. On 1/4/2013 at 9:31 PM, HatersGonnaHate said: Wow. 184 posts and I think you're a fucking asshole. Link to comment Share on other sites More sharing options...
AMI CUSTOMS Posted March 10, 2014 Report Share Posted March 10, 2014 Where is your port at in above diagram? Or is it sealed? Or is a bandpass? All of these play different roles. Cone control and sub placement is very important. TEAM SOUNDQUBED -- TEAM SOUTH TEAM S.O.B. - Founder & Captain 3x Streetbeat World Record Holder 2017 MWSPL 1st place Mayhem & 4th Xtreme 4 2016 MWSPL 1st place Mayhem/2nd Adv 4/2nd Xtreme 4 2015 MWSPL 2nd place Mayhem & 4th Xtreme 4 2014 USACI 2nd place Streetbeat 5 - 162.6 db 2014 MWSPL 2nd place Xtreme 4 - 144.9 db 2013 USACI 1st place Streetbeat 4 - 161.9 db 2013 USACI 1st place Street Q+ - 162.8 db 2013 MWSPL 3rd Kaos2 & 4th Xtreme 4 2011 USACI 2nd place MOD 1001-2k - 160.0 db 2011 MWSPL 4th place: Adv3 - 157.8 db, Kaos2 - 150s db, Xtreme4 - 140s db 2010 ARSPL 1st place 501-750 - 160.3 db Arkansas loudest Best score to date 164.4 db - Termlab Outlaw Streetbeat 4 - 161.9 db Streetbeat 5 - 162.6 db MWSPL on Dash Legal door open (Music) - 162.5 db Sealed on dash Legal (Music) - 161.1 db - Termlab THE BLACK NASTY CURRENT BUILD & FAB The Black Nasty (6) 15 Rebuild Log 2012 (4) 15 Walled Sierra Build Log Evo X build log Facebook page The Black Nasty Link to comment Share on other sites More sharing options...
BassDoctor Posted March 10, 2014 Author Report Share Posted March 10, 2014 Where is your port at in above diagram? Or is it sealed? Or is a bandpass? All of these play different roles. Cone control and sub placement is very important. I am asking this for a ported enclosure in particular, I hadn't thought to include the port because I didn't want to introduce another variable. My assumption was that you'd move the port as you moved the woofer, but if that is wrong please let me know. 04 Honda Accord LX Sedan Kenwood Excelon X998 XS Power D3400 XS Power D1200 Singer 275A alternator with factory bypass 64 sqft SecondSkin Damplifier Build to be decided Link to comment Share on other sites More sharing options...
AMI CUSTOMS Posted March 10, 2014 Report Share Posted March 10, 2014 Need to know more information to accurately answer your questions, cuz my response and the answer would change based on vehicle, your goals, and number of woofers, and power. Also tuning plays a part too. TEAM SOUNDQUBED -- TEAM SOUTH TEAM S.O.B. - Founder & Captain 3x Streetbeat World Record Holder 2017 MWSPL 1st place Mayhem & 4th Xtreme 4 2016 MWSPL 1st place Mayhem/2nd Adv 4/2nd Xtreme 4 2015 MWSPL 2nd place Mayhem & 4th Xtreme 4 2014 USACI 2nd place Streetbeat 5 - 162.6 db 2014 MWSPL 2nd place Xtreme 4 - 144.9 db 2013 USACI 1st place Streetbeat 4 - 161.9 db 2013 USACI 1st place Street Q+ - 162.8 db 2013 MWSPL 3rd Kaos2 & 4th Xtreme 4 2011 USACI 2nd place MOD 1001-2k - 160.0 db 2011 MWSPL 4th place: Adv3 - 157.8 db, Kaos2 - 150s db, Xtreme4 - 140s db 2010 ARSPL 1st place 501-750 - 160.3 db Arkansas loudest Best score to date 164.4 db - Termlab Outlaw Streetbeat 4 - 161.9 db Streetbeat 5 - 162.6 db MWSPL on Dash Legal door open (Music) - 162.5 db Sealed on dash Legal (Music) - 161.1 db - Termlab THE BLACK NASTY CURRENT BUILD & FAB The Black Nasty (6) 15 Rebuild Log 2012 (4) 15 Walled Sierra Build Log Evo X build log Facebook page The Black Nasty Link to comment Share on other sites More sharing options...
BassDoctor Posted March 10, 2014 Author Report Share Posted March 10, 2014 I was hoping there would be a general answer so that I can apply the knowledge for future builds, but nothing is that simple with car audio. I don't have anything set in stone yet, so this is more hypothetical than anything. Let's say that the vehicle is an 04 Honda Accord sedan, the power is 3-4kw, the goal is SPL for one enclosure and musicality with a preference for low notes as the goal for another. Two 10" woofers. 04 Honda Accord LX Sedan Kenwood Excelon X998 XS Power D3400 XS Power D1200 Singer 275A alternator with factory bypass 64 sqft SecondSkin Damplifier Build to be decided Link to comment Share on other sites More sharing options...
AMI CUSTOMS Posted March 10, 2014 Report Share Posted March 10, 2014 SO in general as I can put this since it is a hypothetical, you want the woofer as far away from the port, and by doing so you help control loading, woofer and port placement will depend on org you are competing in and lots of vehicle testing. For daily, subs up port up seems to get a great response. For trunk car, subs forward, port in the middle forward. Just my opinion and what I found from testing. TEAM SOUNDQUBED -- TEAM SOUTH TEAM S.O.B. - Founder & Captain 3x Streetbeat World Record Holder 2017 MWSPL 1st place Mayhem & 4th Xtreme 4 2016 MWSPL 1st place Mayhem/2nd Adv 4/2nd Xtreme 4 2015 MWSPL 2nd place Mayhem & 4th Xtreme 4 2014 USACI 2nd place Streetbeat 5 - 162.6 db 2014 MWSPL 2nd place Xtreme 4 - 144.9 db 2013 USACI 1st place Streetbeat 4 - 161.9 db 2013 USACI 1st place Street Q+ - 162.8 db 2013 MWSPL 3rd Kaos2 & 4th Xtreme 4 2011 USACI 2nd place MOD 1001-2k - 160.0 db 2011 MWSPL 4th place: Adv3 - 157.8 db, Kaos2 - 150s db, Xtreme4 - 140s db 2010 ARSPL 1st place 501-750 - 160.3 db Arkansas loudest Best score to date 164.4 db - Termlab Outlaw Streetbeat 4 - 161.9 db Streetbeat 5 - 162.6 db MWSPL on Dash Legal door open (Music) - 162.5 db Sealed on dash Legal (Music) - 161.1 db - Termlab THE BLACK NASTY CURRENT BUILD & FAB The Black Nasty (6) 15 Rebuild Log 2012 (4) 15 Walled Sierra Build Log Evo X build log Facebook page The Black Nasty Link to comment Share on other sites More sharing options...
BassDoctor Posted March 10, 2014 Author Report Share Posted March 10, 2014 Great man, thank you for taking the time to respond. I'll keep all of this in mind when designing my next enclosures. 04 Honda Accord LX Sedan Kenwood Excelon X998 XS Power D3400 XS Power D1200 Singer 275A alternator with factory bypass 64 sqft SecondSkin Damplifier Build to be decided Link to comment Share on other sites More sharing options...
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