CortezDTV Posted May 22, 2012 Report Share Posted May 22, 2012 If I were to rebuild I would build box with the sealed chamber hook it up then sweep the meter Then tune the box to that frequency, that's how some of the big boys do it Or u can just kinda pick a ratio and go for it! If I were you I would do 3 cubes sealed 9 ported after displacement. 175 inches of port to start and tune to 45hz Shrink the port if the subs unload after testing, just put 3/4 inch birch inside it shrink to 160ish test then maybe 150 ish prolly not 175 seems legit Im no genius.Many on there know way more than me You arnt running a huge power the the big box would help, but the small sealed chamber will bebefit when you actually decide to wire ur amp down or get more power I would reccomend you read the thread on caco called " why 4th orders arnt loud" hankmunch or something I don't remeber his exact name has a ton a great info Ray (dc98hoe) pointed me to that direction to read some of the best info I've ever gotten about 4th orders! Quote SCSB Santa Cruz Speaker Box Build logs: Daily Driver Lemon Marquis 2 american bass 750.1s 350.4 on 14 focal 6.5s sq 945 on 4 hertz tweeters Mystery subs http://www.stevemead...__fromsearch__1 The Mustang 'dubbed' Shirley the project from bullet holes to badass http://www.stevemead...cond-skin-time/ Link to comment Share on other sites More sharing options...
Nasty1 Posted May 22, 2012 Author Report Share Posted May 22, 2012 Thanks for the info .I have been reading that thread and i dont have a meter or DATS and dont have the cash for them so...... Thanks for trying to help me out . Im going to do the GO for it and see what happends. Quote 2 DC Audio lvl 4 xl 18s D .7s walled off @ 30 hz 19 cubes net 245sq in of port Sundown 3500 @ .7 Ohm Sundown 100.4 Rockford Fosgat Power Series 5.25 Dash 6.5 Kicks 8 Coaxils Doors 250 mechicman alt 1 red top under the hood 2 yellow tops in back big 3 with 1/0 knukonceptz wire 3 runs of +/- 1/0 knukonceptz wire IT LBS Link to comment Share on other sites More sharing options...
CortezDTV Posted May 22, 2012 Report Share Posted May 22, 2012 Yea no problem I would get closer to a 3 to 1 ratio prolly get u louder Quote SCSB Santa Cruz Speaker Box Build logs: Daily Driver Lemon Marquis 2 american bass 750.1s 350.4 on 14 focal 6.5s sq 945 on 4 hertz tweeters Mystery subs http://www.stevemead...__fromsearch__1 The Mustang 'dubbed' Shirley the project from bullet holes to badass http://www.stevemead...cond-skin-time/ Link to comment Share on other sites More sharing options...
412 CVX Posted May 22, 2012 Report Share Posted May 22, 2012 Don't tune so damn low. at 43 hz, you're gonna need some impressive midbass to fill in the massive gap in your frequency response. 43 hz will be your upper cutoff frequency. after that frequency it's going to taper down quick, especially with such a huge ratio. Quote Just say no to Ground Pounder Customs. My temp system build log More box buildssome cars do over 170db with one sub, so clearly my two 12"s can do that in my car, with my knowledge too! look out bitches! I'm with captain stupid. Link to comment Share on other sites More sharing options...
CortezDTV Posted May 22, 2012 Report Share Posted May 22, 2012 That's y I said tune to 48 It will get it down low still Quote SCSB Santa Cruz Speaker Box Build logs: Daily Driver Lemon Marquis 2 american bass 750.1s 350.4 on 14 focal 6.5s sq 945 on 4 hertz tweeters Mystery subs http://www.stevemead...__fromsearch__1 The Mustang 'dubbed' Shirley the project from bullet holes to badass http://www.stevemead...cond-skin-time/ Link to comment Share on other sites More sharing options...
windowtinter Posted May 22, 2012 Report Share Posted May 22, 2012 Im all for rules of thumb but after talking to jarod about his team nemesis jeep the rules of thumb did not apply to his application so with that being said build as big as possible make it so you can move the sealed side to make it bigger/smaller. then start tuning the loading wall. 4 15's 8.5-9cubes sealed with a 4.5:1 ratio and port tuning around 37Hz keep in mind he's the middleweight bassboxing champ and it peaks at 45Hz with tuning that low. Quote Link to comment Share on other sites More sharing options...
CortezDTV Posted May 22, 2012 Report Share Posted May 22, 2012 Yea but that's also 4.5 to 1 ration and u just stated that most of that "normal" info didn't work He also tested his truck for his peaks! this guy can't please don't tune so low op I stand firm on my 45hz tuning as the lowest I completly agree with build bigger then shrink tho! Quote SCSB Santa Cruz Speaker Box Build logs: Daily Driver Lemon Marquis 2 american bass 750.1s 350.4 on 14 focal 6.5s sq 945 on 4 hertz tweeters Mystery subs http://www.stevemead...__fromsearch__1 The Mustang 'dubbed' Shirley the project from bullet holes to badass http://www.stevemead...cond-skin-time/ Link to comment Share on other sites More sharing options...
bassface Posted May 22, 2012 Report Share Posted May 22, 2012 Is it possible to just call the manufacturer and have them give you the volumes? Quote Link to comment Share on other sites More sharing options...
412 CVX Posted May 22, 2012 Report Share Posted May 22, 2012 no. if you are going for a daily box, max of a 1:3 ratio, tune to 45 hz AT THE LOWEST. you will still be able to hit the low notes better than you think. the port tuning has little effect on how low you can hit. Quote Just say no to Ground Pounder Customs. My temp system build log More box buildssome cars do over 170db with one sub, so clearly my two 12"s can do that in my car, with my knowledge too! look out bitches! I'm with captain stupid. Link to comment Share on other sites More sharing options...
windowtinter Posted May 23, 2012 Report Share Posted May 23, 2012 Sorry if i implied you should go that big was just using that to make the point that general rules are good but only general you will need to test tune and retest. but if ya build as big as you can you can always go smaller till it get where you want it. Quote Link to comment Share on other sites More sharing options...
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