Chaosgrunt Posted April 24, 2012 Report Share Posted April 24, 2012 Hey fellas. So i started thinking about my next build. When i was thinking about what size subwoofers to put in i realized i could fit 2 18's or 4 12's with ease. Now if i do the 4 12's, ill have more cone area so i figured that would be louder right? Also, can someone give me a rundown of port area to box volume? Isnt it something like 12-15 inches squared for porting to every 1 cubic feet of box volume? Quote Link to comment Share on other sites More sharing options...
AMI CUSTOMS Posted April 24, 2012 Report Share Posted April 24, 2012 (edited) This has been answered numerous times, but since I read it, I will reply.... If you can give the 2 18s proper air space then under the same circumstances, just more cone area is louder. 12-16 sq inches per cube is great place to start. Test and tune to find the best, requires many system builds to find the perfect number of port area. Idea is you want the sub to hit full xmax based off the port tuning without unloading. The sub hitting full xmax is where it is loudest. Edited April 24, 2012 by AMI CUSTOMS Quote 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...
CleanSierra Posted April 24, 2012 Report Share Posted April 24, 2012 What 12's and 18's are you referring to where the 4 12s at roughly 480-500 square cm vs an 18" with roughly 1200+ per woofer 2400+>1920-2000 sq cm. I'M not sure which brands of subs you are interested in, so there is a slight chance I'm not right on with the cone area, but MOST 2 18" combos will have more cone than most 4 12 setups. Quote Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
AMI CUSTOMS Posted April 24, 2012 Report Share Posted April 24, 2012 Wasn't putting to much thought into it and realized 2 18s is more cone area then 4 12s lol Quote 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...
Chaosgrunt Posted April 24, 2012 Author Report Share Posted April 24, 2012 2 18's really has more cone area?! Man thats a brain teaser then lol. Its the AudioQue HDC4's btw. Quote Link to comment Share on other sites More sharing options...
Watch the bass Posted April 24, 2012 Report Share Posted April 24, 2012 You have to look for the dB/watt ratio http://www.ascendantaudio.com/mayhem.php very good ratio in the caraudioscene, if not the best. Yesterday i take a look at a Soundstream T 6 15 sub´s those sub´s have only a ratio of 86.7 or 87.4 did not remember exactly. To compare 12´s with 18´s without names is apples with oranges. Quote "in the abundance of water, the fool is thirsty" Bob Marley Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted April 24, 2012 Report Share Posted April 24, 2012 You have to look for the dB/watt ratio http://www.ascendant....com/mayhem.php very good ratio in the caraudioscene, if not the best. Yesterday i take a look at a Soundstream T 6 15 sub´s those sub´s have only a ratio of 86.7 or 87.4 did not remember exactly. To compare 12´s with 18´s without names is apples with oranges. that number is almost completely irrelevant, anyone who would purely buy a subwoofer off of that needs to really rethink what they are doing. And that is 1 watt (2.83v) at 1 meter away, secondly i think it is also free air. When would you ever feed a sub 1 watt, free air, and listen to it ~3ft away while inside a vehicle? Yes it is sensitivity, but basing how well a sub will perform off of that is ludicrous. pro audio mids and tweets, yes, subwoofers, no. Quote Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted April 24, 2012 Report Share Posted April 24, 2012 2 18's really has more cone area?! Man thats a brain teaser then lol. Its the AudioQue HDC4's btw. 4 12s is roughly 380sq in 2 18s is roughly 440sq in (these are by using pi*r^2 and with the cutout diameter) Quote Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
Chaosgrunt Posted April 24, 2012 Author Report Share Posted April 24, 2012 Is this cone area? V(as)= 48.450 liters (1.711 cubic feet) Quote Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted April 24, 2012 Report Share Posted April 24, 2012 (edited) Is this cone area? V(as)= 48.450 liters (1.711 cubic feet) no, Sd is. 4 12s - 1976cm^2 2 18s - 2318cm^2 Edited April 24, 2012 by ChevyBoy95 Quote Best Score to Date : 160.5 dB Outlaw (47Hz)[4 XM 15's & 2 Taramps Bass 12k's] BL : http://www.stevemeadedesigns.com/board/topic/147800-chevyboy95s-4-15s-7krms-wall-1533-db-on-half-power/YouTube: http://www.youtube.com/hitemwiththeflex/ Link to comment Share on other sites More sharing options...
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