Joe X Posted January 14, 2013 Report Share Posted January 14, 2013 Everything back would be better and id you can find a way to do it properly then I would try that before subs up, but when a box is really big and does not allow for very good airflow, then results are usually only fair, i most trunk cars,12s two or three firing forward and sealed off will probably won't be beaten by any other configuration except walling off. Link to comment Share on other sites More sharing options...
Spencer Good Posted January 14, 2013 Author Report Share Posted January 14, 2013 Everything back would be better and id you can find a way to do it properly then I would try that before subs up, but when a box is really big and does not allow for very good airflow, then results are usually only fair, i most trunk cars,12s two or three firing forward and sealed off will probably won't be beaten by any other configuration except walling off. I am considering a trunk wall, but my opening is not large enough to accommodate for 4 10's and a port forward 2012 TORed Challenger 4 Alpine Type-R 10 1 Brutus 2400.1 20' Knu 1/0 OFC 1 XS Power D1200 Link to comment Share on other sites More sharing options...
STEALTH808 Posted January 14, 2013 Report Share Posted January 14, 2013 The type R recommended specs don't sound as good to me. I built a box for my type R 12's exactly to factory specs, and then again based on some recommendations and the new box is way more efficient and sounds much better. Factory suggested 1.5 ft tuned to 33 hz with around 10 inches of port per foot. When i moved to 2.25 ft per woofer tuned to 32 hz with about 14 inches per foot of port area, it made 2 12's louder than the 3 i could fit before. So in summation: they like bigger boxes with a little more port area than the factory suggests anyway so I think your design is good. yeah 1.5 seems a little small for a 12. but these are 10s. if space is limited, around 1 cube should be fine. TEAM SUNDOWN HAWAIIHAWAIICARAUDIO.NET 150Db Club 160Db club in the future I see krakin as a threat Link to comment Share on other sites More sharing options...
Spencer Good Posted January 14, 2013 Author Report Share Posted January 14, 2013 The type R recommended specs don't sound as good to me. I built a box for my type R 12's exactly to factory specs, and then again based on some recommendations and the new box is way more efficient and sounds much better. Factory suggested 1.5 ft tuned to 33 hz with around 10 inches of port per foot. When i moved to 2.25 ft per woofer tuned to 32 hz with about 14 inches per foot of port area, it made 2 12's louder than the 3 i could fit before. So in summation: they like bigger boxes with a little more port area than the factory suggests anyway so I think your design is good. yeah 1.5 seems a little small for a 12. but these are 10s. if space is limited, around 1 cube should be fine. Stealth you gotta keep in mind also that i'm overpowering them all just a tad, haha. I dropped it down a bit to make up for it. 2012 TORed Challenger 4 Alpine Type-R 10 1 Brutus 2400.1 20' Knu 1/0 OFC 1 XS Power D1200 Link to comment Share on other sites More sharing options...
zxsonnyxz Posted January 14, 2013 Report Share Posted January 14, 2013 Can his port ratio of 1:13 become a bad thing? I've seen people mention that a very narrow port is going to act differently. I'm wondering at which point this happends, and what the actual effects are. STD Passat Build 151db+STD Omega BuildMitsubishi Colt Build - Alpine|Focal|PeerlessHome Stereo BuildSmall Tang Band build - 4" fullrangeBox for 4 8"My Saab 9000 Build- I'd be very happy if you cared to check out the logs and give feedback! Link to comment Share on other sites More sharing options...
STEALTH808 Posted January 14, 2013 Report Share Posted January 14, 2013 id try to do more than 2 inches wide TEAM SUNDOWN HAWAIIHAWAIICARAUDIO.NET 150Db Club 160Db club in the future I see krakin as a threat Link to comment Share on other sites More sharing options...
AlpineSubs111 Posted January 15, 2013 Report Share Posted January 15, 2013 what about # of common port walls? Link to comment Share on other sites More sharing options...
Spencer Good Posted January 15, 2013 Author Report Share Posted January 15, 2013 what about # of common port walls? It isn't sharing common port walls. It's a center port. 2012 TORed Challenger 4 Alpine Type-R 10 1 Brutus 2400.1 20' Knu 1/0 OFC 1 XS Power D1200 Link to comment Share on other sites More sharing options...
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