bigjsurdaddy Posted September 21, 2009 Report Share Posted September 21, 2009 can someone tell me how to tune a box and how to find the resonant freq of your car. Quote Link to comment Share on other sites More sharing options...
Tooshort064 Posted September 21, 2009 Report Share Posted September 21, 2009 1130/(2*FEET) where feet is the distance from front to back in feet Quote 95 Civic Coupe Pioneer AVH-P7600DVD Kinetik HC-1200 In Front Kinetik HC-2000 In Rear Memphis 16-MCA3004 2 X Memphis 16-MCD1000 With Maxxsonics MLX-100 2 X DC LVL 4 XL 12's Pioneer Premier TS-C720PRS In Door's Kenwood KFC-6982ie In Rear Deck All Memphis Wire/Rca's and misc. Link to comment Share on other sites More sharing options...
bigjsurdaddy Posted September 21, 2009 Author Report Share Posted September 21, 2009 1130/(2*FEET) where feet is the distance from front to back in feet which qeustion is that a answer to. Quote Link to comment Share on other sites More sharing options...
Sanitarium Posted September 21, 2009 Report Share Posted September 21, 2009 which qeustion is that a answer to. 42 Quote Link to comment Share on other sites More sharing options...
bigjsurdaddy Posted September 21, 2009 Author Report Share Posted September 21, 2009 42 42? wtf Quote Link to comment Share on other sites More sharing options...
edgar Posted September 21, 2009 Report Share Posted September 21, 2009 42? wtf hmmmm i guess that means for two for question 2 Quote Link to comment Share on other sites More sharing options...
BLuejoules Posted September 21, 2009 Report Share Posted September 21, 2009 uhh ok, dont know whats up with the other two guys but... box tuning is determined by how big your box is, how big your port is and how long your port is. (Im just making RANDOM numbers here for example) Now say I have a 2.5 cubic foot box and I want to tune it to 30 hz, and I want 15 sq inches of port per cubic foot; I would figure out how wide and how tall my port will be to get 15 sq inches of port per cube. Then I use a box calculator (like the one on the12volt.com) to figure out how long my port will need to be to make it 30hz. The longer the port, the lower the tuning. If I forgot anything, let me know. Im half asleep right naw. Quote IG: devinthydude Link to comment Share on other sites More sharing options...
Colin - STAPUFT Posted September 22, 2009 Report Share Posted September 22, 2009 1130/(2*FEET) where feet is the distance from front to back in feet Resonant frequency of your vehicle.... but I dunno if that is the right equation or if it is the same as this: Wave Resonance = 1130/feet/2 1/4 wave Resonance = 1130/feet/4 1130 is appx. the speed of sound (dependent upon height above sea level, humidity, temperature, etc...). Feet is the distance from your speaker wall or box to your firewall. So my van for example (i am guessing on my distance): 1130/7/2 = 80.72 hz (pleh! that is too high!) so... your quarter wave distance is: 1130/8/4 = 40.35 hz (ah ha!!! much better for burping- get subs and build a box accordingly) Voila! Somewhere around in there - wet finger in the air - is where you should be loudest. So, if you want loud, tune your box a bit below that number and off you go. Quote 12 - 12"s in the STAY PUFT 1989 Chevy Astro Build & Comment Log Un-Interrupted Build LogYouTube Channel Chevy Trailblazer 5.1 Dolby Digital DTS Install You have a beard of a mysterious sea captain. I would follow you to hell and back. Link to comment Share on other sites More sharing options...
Boon Posted September 22, 2009 Report Share Posted September 22, 2009 For resonant frequency, seal your box and run a sweep on the termlab. But if you don't know how to tune a box you shouldn't really be worrying about resonant frequency yet... Quote 10.x volts fo' life! Link to comment Share on other sites More sharing options...
bigjsurdaddy Posted September 22, 2009 Author Report Share Posted September 22, 2009 i'm getting ready to build my first lagit system. so i want to get it right. thanks for all the help guys, when i get the money for the rest of my system i'll be sure to post my pics or everyone. have a great day and keep the beats flowing. Quote Link to comment Share on other sites More sharing options...
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