STEvil Posted October 16, 2012 Report Share Posted October 16, 2012 area is measured in square inches, not cubic feet. MickyMcD - "Capable of making some serious trouser flapping volumes at where's-my-testicles frequencies, the Servo-Drives used to be fairly jaw dropping..." Any time you have have a power wire next to your frame put some rubber hosing (or cut up an innertube) around it. The wire is bound to wiggle (due to driving or flex) and the casing will eventually wear through. Hammerdown... 1% no links to outside websites, business related FB/YT pages allowed. Link to comment Share on other sites More sharing options...
ChatraN Posted October 16, 2012 Report Share Posted October 16, 2012 changed the tune a little bit.. up to 35Hz now Link to comment Share on other sites More sharing options...
1 Sock Posted October 17, 2012 Report Share Posted October 17, 2012 Whats up with the millimeters? Link to comment Share on other sites More sharing options...
cjvue Posted October 17, 2012 Report Share Posted October 17, 2012 Whats up with the millimeters? I think understand mm better.... My Build Log- T E A M S U N D O W N A U D I O - 2013 DbDrag WF SS1-2 - 5th Place 154.6db 2013 MECA Mod3 CA State Final Champ 153.4db Powered by: Sundown Audio Link to comment Share on other sites More sharing options...
ChatraN Posted October 17, 2012 Report Share Posted October 17, 2012 Whats up with the millimeters? our measurement system is based on meters. Argentina here x) Link to comment Share on other sites More sharing options...
zanekeimigdesigns Posted October 24, 2012 Report Share Posted October 24, 2012 so do you just change the fs in the equation if you want to tune it differently? Link to comment Share on other sites More sharing options...
Chris Hammer Posted October 24, 2012 Report Share Posted October 24, 2012 so do you just change the fs in the equation if you want to tune it differently? yeah..and in turn it changes the overall length. MY BUILD *****http://tinyurl.com/gmcbuild***** Vehicles 2005 GMC Canyon CB1000r - Currently where any future funds are going. (exhasut,bazzaz, ohlins shock, screen, etc.) crf250r - Used to be race bike..now I just trail ride..practice at the track on it. CH80 - Daily beater (when nice weather)best 150$ ever spent. 100+mpg Sold to: Skullz - pstone11 - Leo1103 - Volvo 63' - pavelpardo - imnew59585 Shower farts still piss me off.I think theyre pretty neat. When the water runs down your crack as you let one out... its like shitting in a crockpot. Link to comment Share on other sites More sharing options...
Wizzy Posted October 24, 2012 Report Share Posted October 24, 2012 Hello guys. I am new around here as a member but i was watching this forum for a while. Can someone help me with a t-line box project for 4 12's? I have 4 spl dynamics v300d4 woofers. I would prefer a 33 - 35 hz tune. Here are some parameters for the woofers. Nominal impedance 2x4 ohm Voice coils connection series 8 ohm: Fs 30.7 hz Vas 65.4L Qts 0.553 Qes 0.616 Qms 5.456 Xmax lin/peak 10/20 mm Re 6.4 ohm Mms 146 g Bl 18.18 Tm Spl 1w/m 87.6 db For parallel voice coils connection 2 ohm: Fs 30.9 hz Vas 67.2 L Qts 0.595 Qes 0.664 Qms 5.676 Xmax lin/peak 11/20 mm Re 1.6 ohm Mms 146 g BL 8.586 Tm Spl 87.6 db 1w/m If you have any suggestions of how to connect them together and what kind of box should i use... i'm looking forward. I want to use them as daily driving but also in spl. i have enough space in the car because i quit off the back seats. Thank you. Link to comment Share on other sites More sharing options...
zanekeimigdesigns Posted October 24, 2012 Report Share Posted October 24, 2012 so do you just change the fs in the equation if you want to tune it differently? yeah..and in turn it changes the overall length. Gotchya. Thanks! Link to comment Share on other sites More sharing options...
Wizzy Posted October 25, 2012 Report Share Posted October 25, 2012 Nobody wants to help me? I can't understand how to calculate exactly the length and how to place the 4 subs in single box. If i have 4 12" subs the port area has to be the sd of 1 sub multiplied by 4? Link to comment Share on other sites More sharing options...
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