AB18VFL Posted May 24, 2012 Report Share Posted May 24, 2012 Today I built a box for my 12" TC9 proto. The sub can supposedly it can handle up to 1500rms. It's dual 2 ohm (each coil is sitting at a constant 1.7ohm). The box is 2.2 cubes tuned to 34hz with 12 sq in of port per cube (14.5h x 18w x 24d). I'm only running 600rms to it via JBL monoblock @1ohm. It has no subsonic filter (guessing it's built in), lowpass is around 80, and gains were set with my DD-1. I built the box long, instead of wide, with sub and port on the front of the box. This is roughly what it looks like (and enjoy my artwork). When I play really loud, my sub starts bottoming out on some lower frequencies. I heard the coil bounce off the backplate a couple times, but got to the volume knob before it was too late. Also, some lower notes seem to have that "unloading" sound. Is this all happening because of there being too much airspace behind the cone of my woofer? Quote SUBSCRIBE AT YOUTUBE! 18abVFL < CLICK!! 2005 Subaru Impreza My build log. Head unit- Kenwood Excelon KDC-X695 Front doors- Rockford Fosgate 6.5" Prime components Rear doors- Rockford Fosgate 4" Punch coaxials Sub amp- Audiopipe AP18001d Subs- Two American Bass TNT 10"s Box- 2.6 cubes @ 34hz, 36in of port Big 3 & run of Raptor 1/0 to rear powercell TEAM 808 UPSTATE NY. Can it be heard 2 blocks away, thats how i rate systems. Link to comment Share on other sites More sharing options...
Socky Posted May 24, 2012 Report Share Posted May 24, 2012 Could be unloading to the port, depends on port placement, or not enough pressure inside of the box. Maybe to big of a box, try shinking the box some internal. The soft parts may not be suited for that much airspace, normally tc subwoofers like smaller boxes if i remember correctly. Quote Jeep Cherokee 4dr -4.75 in front, new rusty's 4.5 in rear leafs -micky thompson 35x14.50x15 -locker rear -Rusty's offroad Engine/transmission/transfer case/crossmember/gas tank skid plates -Warn front bumper with 8000lb winch -Custom rear bumper -Warrior product tube doors (summertime) -Optima redtop (starter) -26XK miles and still runs like a bat out of hell Kenwood H/U 1/0 wire, 136 amp alt 200 ah batteries 12.7 daily 2 Apsm 1500 @ 2 ohm strapped on zv3 d1 with ns softparts Mb quart 125.4 wired to 4 aura 6's 3.6 cube box tuned to 36 plays down to 23hz Link to comment Share on other sites More sharing options...
OrionStang Posted May 24, 2012 Report Share Posted May 24, 2012 2.2 for a 12 is pretty big. Shrink down to 1.9-2.0 and see what happens. Quote SMD Super Seller My Feedback Thread Link to comment Share on other sites More sharing options...
AB18VFL Posted May 24, 2012 Author Report Share Posted May 24, 2012 2.2 for a 12 is pretty big. Shrink down to 1.9-2.0 and see what happens. i'm not shunning your advice man, but everyone on here says "underpowering sub=bigger box" haha. i used to love building boxes, but now it just seems like such a chore, i dont wanna do it again. Quote SUBSCRIBE AT YOUTUBE! 18abVFL < CLICK!! 2005 Subaru Impreza My build log. Head unit- Kenwood Excelon KDC-X695 Front doors- Rockford Fosgate 6.5" Prime components Rear doors- Rockford Fosgate 4" Punch coaxials Sub amp- Audiopipe AP18001d Subs- Two American Bass TNT 10"s Box- 2.6 cubes @ 34hz, 36in of port Big 3 & run of Raptor 1/0 to rear powercell TEAM 808 UPSTATE NY. Can it be heard 2 blocks away, thats how i rate systems. Link to comment Share on other sites More sharing options...
ChevyBoy95 Posted May 24, 2012 Report Share Posted May 24, 2012 maybe the coil can handle 1500rms thermally, but the suspension isnt stiff enough for 1500rms. 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...
Bump4life Posted May 24, 2012 Report Share Posted May 24, 2012 (edited) maybe your box wasnt built/ tuned/designed like you thought it was? Edited May 24, 2012 by Bump4life Quote Buyer/Seller Feedback Thread: http://www.stevemead...5015-bump4life/ MB C220 153 Trunk Car Build Log: http://www.stevemead...d/#entry1840136 MB C280 Ipad Dash SQ Build Log: http://www.stevemeadedesigns.com/board/topic/194484-bump4lifes-new-benz-tony-c-relay-kit-pictures-ce-electric-audison-front-stage-installed/ My SPL Log: http://www.stevemead...__fromsearch__1 BMW M340 xDrive Stock, for now. Corner Load 10" maybe soon. But does 10s in the 1/4... Best Scores out of a trunk 153.0 sealed legal full tilt clamped 5524 @ 42 hz 154+ windows down, 155+ kick Link to comment Share on other sites More sharing options...
AB18VFL Posted May 24, 2012 Author Report Share Posted May 24, 2012 maybe your box wasnt built/ tuned/designed like you thought it was? Quote SUBSCRIBE AT YOUTUBE! 18abVFL < CLICK!! 2005 Subaru Impreza My build log. Head unit- Kenwood Excelon KDC-X695 Front doors- Rockford Fosgate 6.5" Prime components Rear doors- Rockford Fosgate 4" Punch coaxials Sub amp- Audiopipe AP18001d Subs- Two American Bass TNT 10"s Box- 2.6 cubes @ 34hz, 36in of port Big 3 & run of Raptor 1/0 to rear powercell TEAM 808 UPSTATE NY. Can it be heard 2 blocks away, thats how i rate systems. Link to comment Share on other sites More sharing options...
AB18VFL Posted May 24, 2012 Author Report Share Posted May 24, 2012 maybe the coil can handle 1500rms thermally, but the suspension isnt stiff enough for 1500rms. im only giving it 600rms... Quote SUBSCRIBE AT YOUTUBE! 18abVFL < CLICK!! 2005 Subaru Impreza My build log. Head unit- Kenwood Excelon KDC-X695 Front doors- Rockford Fosgate 6.5" Prime components Rear doors- Rockford Fosgate 4" Punch coaxials Sub amp- Audiopipe AP18001d Subs- Two American Bass TNT 10"s Box- 2.6 cubes @ 34hz, 36in of port Big 3 & run of Raptor 1/0 to rear powercell TEAM 808 UPSTATE NY. Can it be heard 2 blocks away, thats how i rate systems. Link to comment Share on other sites More sharing options...
Bump4life Posted May 24, 2012 Report Share Posted May 24, 2012 idk if your amp has a sub sonic filter built in? Quote Buyer/Seller Feedback Thread: http://www.stevemead...5015-bump4life/ MB C220 153 Trunk Car Build Log: http://www.stevemead...d/#entry1840136 MB C280 Ipad Dash SQ Build Log: http://www.stevemeadedesigns.com/board/topic/194484-bump4lifes-new-benz-tony-c-relay-kit-pictures-ce-electric-audison-front-stage-installed/ My SPL Log: http://www.stevemead...__fromsearch__1 BMW M340 xDrive Stock, for now. Corner Load 10" maybe soon. But does 10s in the 1/4... Best Scores out of a trunk 153.0 sealed legal full tilt clamped 5524 @ 42 hz 154+ windows down, 155+ kick Link to comment Share on other sites More sharing options...
AB18VFL Posted May 24, 2012 Author Report Share Posted May 24, 2012 idk if your amp has a sub sonic filter built in? lol me eiths brah Quote SUBSCRIBE AT YOUTUBE! 18abVFL < CLICK!! 2005 Subaru Impreza My build log. Head unit- Kenwood Excelon KDC-X695 Front doors- Rockford Fosgate 6.5" Prime components Rear doors- Rockford Fosgate 4" Punch coaxials Sub amp- Audiopipe AP18001d Subs- Two American Bass TNT 10"s Box- 2.6 cubes @ 34hz, 36in of port Big 3 & run of Raptor 1/0 to rear powercell TEAM 808 UPSTATE NY. Can it be heard 2 blocks away, thats how i rate systems. Link to comment Share on other sites More sharing options...
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