SojiaRaggs9000 Posted June 27, 2009 Report Share Posted June 27, 2009 (edited) dude how do you figure out the math is there like a formula you use i dont understand it could you please explain it to me thanks ~will ( 1130 / freq ) / ¼ = ¼ wave length and ( Cone Area / 2 ) = ( X )² x 3.14 = X in² and u need to check ur maths 1/4 wave for 30 Hz is just over 9 ft. Is it bad to tune it 5-6 Hz over the Fs? Enlighten me because as far as I can tell my math is correct. dude how do you figure out the math is there like a formula you use i dont understand it could you please explain it to me thanks ~will ( 1130 / 30.76 ) / ¼ = ¼ wave length 36.73602080624187256178530559168 / .25 = 146.94408322496749024707412223667in now convert inches to feet 146.94408322496749024707412223667in / 12in 12.245340268747290853922843519723ft (12.245ft rounded) just a bit under 12 ¼ft. Edited June 27, 2009 by SojiaRaggs9000 Quote * Eclipse CD3200 with PAC SWI-CAN2 and SW-ECL2 Steering Wheel Controls Interface* Pioneer D-Series Mids and Highs ( Fronts: TS-D1702C; Rears; TS-D1702R and Dash; TS-D1002R )* Rockford Fosgate PBR300X4 ( Mids and Highs Amp )* DC 3.5k with Dual Inputs; Custom Plexiglass Backing ( Sub Amp )* Rockford Fosgate Balanced Line Driver * One FULLY LOADED ~ 10" DC m2 XL* Custom Built Carpeted Ported Box Tuned to 32hz. Single Chamber With Volume of 1.44618³ ft ; 1.13216³ ft After Displacement* Custom Built Carpeted Trunk Wall with Added Fans for Amplifier Cooling* MechMan 240a High Output Alternator * KnuKonceptz Krystal Kable RCA Cables* Upgraded Electrical With 1/0 KnuKonceptz Kolossus Fleks Kable and 1/0 Sky High Car Audio Cable* Five Exide Orbital ORB34M Marine 12 Volt Batteries* PowerMaster XS D3100 12 Volt Battery My 2008 Chrysler 300 Limited - SuperCharged 3.5L V6 - UBL My Old 2005 Ford Taurus - CarDomain - Vehicle Was Sold Link to comment Share on other sites More sharing options...
siucsaluki11 Posted June 27, 2009 Author Report Share Posted June 27, 2009 ( 1130 / freq ) / ¼ = ¼ wave length and ( Cone Area / 2 ) = ( X )² x 3.14 = X in²Enlighten me because as far as I can tell my math is correct. ( 1130 / 30.76 ) / ¼ = ¼ wave length 36.73602080624187256178530559168 / .25 = 146.94408322496749024707412223667in now convert inches to feet 146.94408322496749024707412223667in / 12in 12.245340268747290853922843519723ft (12.245ft rounded) just a bit under 12 ¼ft. Your math is correct, your steps are wrong. 1130 fps /30.76 Hz= 36.7 Ft. That is right. Now to find the quarte wave you dont divide by a quarter, that would multiply it by 4. THAT IS WHERE YOURE MATH IS FUCKED. Dividing by a fraction multiplies, multiplying by a fraction divides. So you could multiply it by .25 to get a quarter wave, or divide it by 4, but not divide it by .25. So i can tell you that simple math tells me 36/4 is just over 9. Now mr smartass. You have been enlightened. Im pretty good with numbers. Hate to sound concieted but dont fuck with me when it comes to math 99% of the time, im human and make an occasional error yes, but make sure you check your shit and do all the right steps first. Quote woman..cant live with em...cant shoot em...guess were all fucked You might be a Redneck if you use your leftover gutters for a speaker box port... YOU JUST LOST THE GAMER.I.P. Blazer=========================Last setup was in the 141s on music (37hz) with 2 12s and 1kw in a 4dr blazer.2010 Mitsubishi Lancer DE2 12in Clarions (kept from blazer)HiFonics BRZ1700.1d (at 2 ohms BLOWN) [JBL GTS180X for subs currently 60wRMS x2ch!!!!!! This works for till i get the blown amp fixed] Alpine 4ch salvaged from blazer (currently near death)9887 peerless 7s in the doors and CDT tweeters ran active no speakers in the rearKintik HC1400 under the hood.metered once a while ago, dont remember it...was piss poor compared to the blazer, mid 130s i think....looking to replace subs and amp when i have money. Link to comment Share on other sites More sharing options...
SojiaRaggs9000 Posted June 27, 2009 Report Share Posted June 27, 2009 AH yeah I see now. Simply didn't start out with the correct formula. As for the "Mr Smartass" comment I was only trying to help you with your request for help. In correct formula or not ... T-Lines are not intended to be "tuned" they are built according to the subs Fs as far as I know. Quote * Eclipse CD3200 with PAC SWI-CAN2 and SW-ECL2 Steering Wheel Controls Interface* Pioneer D-Series Mids and Highs ( Fronts: TS-D1702C; Rears; TS-D1702R and Dash; TS-D1002R )* Rockford Fosgate PBR300X4 ( Mids and Highs Amp )* DC 3.5k with Dual Inputs; Custom Plexiglass Backing ( Sub Amp )* Rockford Fosgate Balanced Line Driver * One FULLY LOADED ~ 10" DC m2 XL* Custom Built Carpeted Ported Box Tuned to 32hz. Single Chamber With Volume of 1.44618³ ft ; 1.13216³ ft After Displacement* Custom Built Carpeted Trunk Wall with Added Fans for Amplifier Cooling* MechMan 240a High Output Alternator * KnuKonceptz Krystal Kable RCA Cables* Upgraded Electrical With 1/0 KnuKonceptz Kolossus Fleks Kable and 1/0 Sky High Car Audio Cable* Five Exide Orbital ORB34M Marine 12 Volt Batteries* PowerMaster XS D3100 12 Volt Battery My 2008 Chrysler 300 Limited - SuperCharged 3.5L V6 - UBL My Old 2005 Ford Taurus - CarDomain - Vehicle Was Sold Link to comment Share on other sites More sharing options...
siucsaluki11 Posted June 27, 2009 Author Report Share Posted June 27, 2009 smartass was only because the "enlignten me" came across smartassed. That is all. I appreciate your help. You had the right formula for the most part, just mixed up one step. My main concerns are what if the tline is at 35-36 Hz and the subs Fs is 30, and what happens if there is too much port? Quote woman..cant live with em...cant shoot em...guess were all fucked You might be a Redneck if you use your leftover gutters for a speaker box port... YOU JUST LOST THE GAMER.I.P. Blazer=========================Last setup was in the 141s on music (37hz) with 2 12s and 1kw in a 4dr blazer.2010 Mitsubishi Lancer DE2 12in Clarions (kept from blazer)HiFonics BRZ1700.1d (at 2 ohms BLOWN) [JBL GTS180X for subs currently 60wRMS x2ch!!!!!! This works for till i get the blown amp fixed] Alpine 4ch salvaged from blazer (currently near death)9887 peerless 7s in the doors and CDT tweeters ran active no speakers in the rearKintik HC1400 under the hood.metered once a while ago, dont remember it...was piss poor compared to the blazer, mid 130s i think....looking to replace subs and amp when i have money. Link to comment Share on other sites More sharing options...
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