teamace24 Posted January 16, 2010 Report Share Posted January 16, 2010 About to start on my box this weekend for my 2 Audioque sdc2.5 15 subs and had some questions that would help me a lot. First my box will be as follows and i need to know if anyone can figure out my tuning and what net volume my subs will see. My box will be 47 inches wide, 18 inches tall, and 26 inches deep. The port height will be 16.5 inches tall, 8.5 inches wide, and this one is confusing but either 16 inches or 16.75 inches long if i include my front baffle where my subs will go. My subs and port will fire to the rear of the truck and wood is .75 inch thick. AMp is Aq 1200d. My last question is my most important one. I need to know how to calculate the bracing volume that a dowel rod will take up since that is what i want to use for bracing. Like how do i calulate the cubic feet in volume that a dowel rod bracing will take up. I know it has something to do with dividing by 1728 but can you help. Thanks. Quote 1st Setup(SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 Audioque SDC2.5 15 subs8.7 cubes at 37hz build DONEAudioque 1200d (Audioque 1200d Sold, similar performance to my ap1500)Diamond Audio Hex 6.5 Mids n TweetsCerwin Vega Exl 400 4 channel Bridged(also have MTX 4004 not being used)1 Run of power Knu Fleks 4 Gauge2 Cheap stock Battery setup2nd Setup (SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 15 Kicker cvx (maybe two SA 15 in future)7 cubes net tuned at 34hzAlphasonik Old school 1600rms (ap 1500d sold GREAT Budget amp)JBL 6.5 Power Series Components, Infinity Kappa 6.5 3 ways, and 2 Kicker KS Tweets (LOUD)Cerwin vega exl4001 run knu Fleks OFC 0 gaugeBig 3 done1 Odyssey 1500, 1 optima yellow top d31 Link to comment Share on other sites More sharing options...
Marlo Stanfield Posted January 16, 2010 Report Share Posted January 16, 2010 According to Expo's calc #s look to be - 8.68ft3 net(after port/sub(s) displacement), 140.25in^2 of port area, and a 41.1hz tuning.. This was using port length of 16".... Using a 16.75" port length the only difference you see is a tuning of 40.71hz + 8.6ft3 net, which is so small it wouldn't make a difference. Using the woofers + power you're running I wouldn't suggest running that large of an enclosure, that high of a tuning, or that much port area... I'd suggest like 8ft3 @ 35hz w/ 100-115in^2 of port area for the woofers/power you're running. To calculate bracing just find the volume of a cylinder(what ever size dowels you're using) and add that final number into the sub displacement box(at least when using Expo's calc). I'm a little drunk so I wouldn't exactly quote me 100% on all these numbers lol. Quote 1998 Ford Explorer Eddie Bauer... New setup, old ride... QX56 is staying stock til I get loud... It's only getting walled off if I don't meet my goal @ SBN. Pioneer AVIC-N2 (12) 12" RE SXs old model.... (3) AB VFL 500.1 @ 1ohm each Dual 300amp Ohio Gen alts.... (10) Northstar NSB-125s 26ft3 @ 33hz w/ a ton of port area 156.5 @ 40hz @ dash, Db Drag style / 153.2 Bassrace Link to comment Share on other sites More sharing options...
teamace24 Posted January 16, 2010 Author Report Share Posted January 16, 2010 According to Expo's calc #s look to be - 8.68ft3 net(after port/sub(s) displacement), 140.25in^2 of port area, and a 41.1hz tuning.. This was using port length of 16".... Using a 16.75" port length the only difference you see is a tuning of 40.71hz + 8.6ft3 net, which is so small it wouldn't make a difference.Using the woofers + power you're running I wouldn't suggest running that large of an enclosure, that high of a tuning, or that much port area... I'd suggest like 8ft3 @ 35hz w/ 100-115in^2 of port area for the woofers/power you're running. To calculate bracing just find the volume of a cylinder(what ever size dowels you're using) and add that final number into the sub displacement box(at least when using Expo's calc). I'm a little drunk so I wouldn't exactly quote me 100% on all these numbers lol. Wow are you sure since i am using that exact same calculator and when i enter 47 wide, 26 deep, 18 high, and the port i enter 16.5 height, 8.5 width, and for the length i enter 16 or 16.75 i get box tuning 8.99 with a tuning frequency of 35.15. Please double check this as now my build is on hold since first off i do not want my tuning to be above 35.5 or 36 hz and as far as the volume i want as close to 9 net as possible for the lows. Quote 1st Setup(SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 Audioque SDC2.5 15 subs8.7 cubes at 37hz build DONEAudioque 1200d (Audioque 1200d Sold, similar performance to my ap1500)Diamond Audio Hex 6.5 Mids n TweetsCerwin Vega Exl 400 4 channel Bridged(also have MTX 4004 not being used)1 Run of power Knu Fleks 4 Gauge2 Cheap stock Battery setup2nd Setup (SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 15 Kicker cvx (maybe two SA 15 in future)7 cubes net tuned at 34hzAlphasonik Old school 1600rms (ap 1500d sold GREAT Budget amp)JBL 6.5 Power Series Components, Infinity Kappa 6.5 3 ways, and 2 Kicker KS Tweets (LOUD)Cerwin vega exl4001 run knu Fleks OFC 0 gaugeBig 3 done1 Odyssey 1500, 1 optima yellow top d31 Link to comment Share on other sites More sharing options...
Marlo Stanfield Posted January 16, 2010 Report Share Posted January 16, 2010 I just forgot to click the slot port button, which is where out large discrepancies occurred. Quote 1998 Ford Explorer Eddie Bauer... New setup, old ride... QX56 is staying stock til I get loud... It's only getting walled off if I don't meet my goal @ SBN. Pioneer AVIC-N2 (12) 12" RE SXs old model.... (3) AB VFL 500.1 @ 1ohm each Dual 300amp Ohio Gen alts.... (10) Northstar NSB-125s 26ft3 @ 33hz w/ a ton of port area 156.5 @ 40hz @ dash, Db Drag style / 153.2 Bassrace Link to comment Share on other sites More sharing options...
Decaf Posted January 16, 2010 Report Share Posted January 16, 2010 Wow are you sure since i am using that exact same calculator and when i enter 47 wide, 26 deep, 18 high, and the port i enter 16.5 height, 8.5 width, and for the length i enter 16 or 16.75 i get box tuning 8.99 with a tuning frequency of 35.15. Please double check this as now my build is on hold since first off i do not want my tuning to be above 35.5 or 36 hz and as far as the volume i want as close to 9 net as possible for the lows. put smallest port dimension in for height this will change ur tuning Quote Link to comment Share on other sites More sharing options...
teamace24 Posted January 16, 2010 Author Report Share Posted January 16, 2010 put smallest port dimension in for heightthis will change ur tuning So am i entering the values wrong in the port boxes wrong? My lowest is the port width which is 8.5 and if i enter that in the port height i get a tuning slightly over 37 which i do not want, is this right? and if so how do i fix it if i want similar net volume but 35 hz tuning. Thanks. Quote 1st Setup(SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 Audioque SDC2.5 15 subs8.7 cubes at 37hz build DONEAudioque 1200d (Audioque 1200d Sold, similar performance to my ap1500)Diamond Audio Hex 6.5 Mids n TweetsCerwin Vega Exl 400 4 channel Bridged(also have MTX 4004 not being used)1 Run of power Knu Fleks 4 Gauge2 Cheap stock Battery setup2nd Setup (SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 15 Kicker cvx (maybe two SA 15 in future)7 cubes net tuned at 34hzAlphasonik Old school 1600rms (ap 1500d sold GREAT Budget amp)JBL 6.5 Power Series Components, Infinity Kappa 6.5 3 ways, and 2 Kicker KS Tweets (LOUD)Cerwin vega exl4001 run knu Fleks OFC 0 gaugeBig 3 done1 Odyssey 1500, 1 optima yellow top d31 Link to comment Share on other sites More sharing options...
Guest Posted January 16, 2010 Report Share Posted January 16, 2010 So am i entering the values wrong in the port boxes wrong? My lowest is the port width which is 8.5 and if i enter that in the port height i get a tuning slightly over 37 which i do not want, is this right? and if so how do i fix it if i want similar net volume but 35 hz tuning. Thanks. you wont really notice 2hz of tuning. AQ subs are designed (correct me if im wrong) to play WELL below tuning w/o bottoming out. Quote Link to comment Share on other sites More sharing options...
teamace24 Posted January 16, 2010 Author Report Share Posted January 16, 2010 you wont really notice 2hz of tuning. AQ subs are designed (correct me if im wrong) to play WELL below tuning w/o bottoming out. I really rather go with the 35 hz tuning and not more as i got a lot of advice on the tuning to be this way with people who metered their setup with audioque subs. I do know they play well below tuning but i want to optimize the sound i am looking for as i listen to a lot of spanish that contains very low bass lines. Quote 1st Setup(SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 Audioque SDC2.5 15 subs8.7 cubes at 37hz build DONEAudioque 1200d (Audioque 1200d Sold, similar performance to my ap1500)Diamond Audio Hex 6.5 Mids n TweetsCerwin Vega Exl 400 4 channel Bridged(also have MTX 4004 not being used)1 Run of power Knu Fleks 4 Gauge2 Cheap stock Battery setup2nd Setup (SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 15 Kicker cvx (maybe two SA 15 in future)7 cubes net tuned at 34hzAlphasonik Old school 1600rms (ap 1500d sold GREAT Budget amp)JBL 6.5 Power Series Components, Infinity Kappa 6.5 3 ways, and 2 Kicker KS Tweets (LOUD)Cerwin vega exl4001 run knu Fleks OFC 0 gaugeBig 3 done1 Odyssey 1500, 1 optima yellow top d31 Link to comment Share on other sites More sharing options...
teamace24 Posted January 16, 2010 Author Report Share Posted January 16, 2010 put smallest port dimension in for heightthis will change ur tuning I just got help for my port calculations using the expo calc from torres and he told me i entered the values for my port wrong instead of putting 8.5 for the height i put it in the width which he let me know that the value that goes in to the port height is the value from the port wall to the box. So my real values for my box including my total sub displacement of .3 is 8.93 net volume, 37.54 tuning, and 140.35 port area. I need help in getting my tuning to 35 hz or just above it but not past 36 hz. I need to know if i will need to bend the port after the initial 16 inches long and if so for how much longer. Any help will be appreciated. Quote 1st Setup(SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 Audioque SDC2.5 15 subs8.7 cubes at 37hz build DONEAudioque 1200d (Audioque 1200d Sold, similar performance to my ap1500)Diamond Audio Hex 6.5 Mids n TweetsCerwin Vega Exl 400 4 channel Bridged(also have MTX 4004 not being used)1 Run of power Knu Fleks 4 Gauge2 Cheap stock Battery setup2nd Setup (SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 15 Kicker cvx (maybe two SA 15 in future)7 cubes net tuned at 34hzAlphasonik Old school 1600rms (ap 1500d sold GREAT Budget amp)JBL 6.5 Power Series Components, Infinity Kappa 6.5 3 ways, and 2 Kicker KS Tweets (LOUD)Cerwin vega exl4001 run knu Fleks OFC 0 gaugeBig 3 done1 Odyssey 1500, 1 optima yellow top d31 Link to comment Share on other sites More sharing options...
teamace24 Posted January 17, 2010 Author Report Share Posted January 17, 2010 Ok after tweaking the expo calculator all day i think i have a finished product i can put to test. My box for a pair of sdc 2.5 15 will be as follows. 47 wide, 18 tall, 26 deep. The port dimensions will be 8.5 width, 16.5 tall, and 20 inches deep. I entered 8.5 on the calculator as the port height as i was told to do my the creator of the software. Subs displacement total is .3. I am using .75 mdf and sub and port to rear. I came up with 8.58 net volume, 35.98 tuning, as well as 140.25 port area. Please let me know if all of this is right. Also since my port is 20 inches long my actual wood cuts will be 16x16.5 for the first port plate and then it bends to get the remainder 2.5 inches to equal 20 inches total long so therefore my actual port 2 plate cut will be 2.5x16.5. Since my front baffle will overlap my port 1 cut my port 1 length will be 16.75. Please let me know what you guys think. Quote 1st Setup(SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 Audioque SDC2.5 15 subs8.7 cubes at 37hz build DONEAudioque 1200d (Audioque 1200d Sold, similar performance to my ap1500)Diamond Audio Hex 6.5 Mids n TweetsCerwin Vega Exl 400 4 channel Bridged(also have MTX 4004 not being used)1 Run of power Knu Fleks 4 Gauge2 Cheap stock Battery setup2nd Setup (SOLD):2007 GMC YukonPioneer Avic F90bt Audiocontrol Epicenter2 15 Kicker cvx (maybe two SA 15 in future)7 cubes net tuned at 34hzAlphasonik Old school 1600rms (ap 1500d sold GREAT Budget amp)JBL 6.5 Power Series Components, Infinity Kappa 6.5 3 ways, and 2 Kicker KS Tweets (LOUD)Cerwin vega exl4001 run knu Fleks OFC 0 gaugeBig 3 done1 Odyssey 1500, 1 optima yellow top d31 Link to comment Share on other sites More sharing options...
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