posted
Justin I think the other probe is the tuning of the sead boxes I think that the wall is not big enough for 4 18 `s that the sealed box vol. in the walled part the vol. of the sealed is to much. He needs to try every option I know the sealed boxes are to small. I bet the sealed boxes with 15s will wange. I just think that 2 18 `s with the proper vol. is going to work way better if he had a 4 12s I think it would work better then the 4 18 `s I also think that the cone flex under pressure in that wall is to much as well and with a 12 there will be less stress on the outer cone.
He need to talk to Mike Bartells on how he did his sealed box he used two 15 `s in a moveable sealed box if I remember right. I think I still have PICS of the build that he sent me at one time just have to find them and get the OK to post them.
-------------------- TEAM XTREME LOUD AUDIO THE LOUD CROWD Team Dc Sound Labs. Posts: 2781 | From: Springfield Ma | Registered: Apr 2004
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posted
any updates , nice build, i do say your loading only needs to be around 4 inches thick, with pvc on the end and i have had good luck making the open in to cabin 1/2 of the width including the 4 inch pvc pipe half.
how many amps are running ? all sealed boxes are seperate?
-------------------- ear drums are very over rated
r.i.p. greg welch
2005 dbdrags bassrace world finalist 120-129.9 3rd place finish Posts: 1273 | From: somewere in time | Registered: Nov 2001
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quote:Originally posted by Old/School: Justin I think the other probe is the tuning of the sead boxes I think that the wall is not big enough for 4 18 `s that the sealed box vol. in the walled part the vol. of the sealed is to much. He needs to try every option I know the sealed boxes are to small. I bet the sealed boxes with 15s will wange. I just think that 2 18 `s with the proper vol. is going to work way better if he had a 4 12s I think it would work better then the 4 18 `s I also think that the cone flex under pressure in that wall is to much as well and with a 12 there will be less stress on the outer cone.
He need to talk to Mike Bartells on how he did his sealed box he used two 15 `s in a moveable sealed box if I remember right. I think I still have PICS of the build that he sent me at one time just have to find them and get the OK to post them.
TJ, I spoke to Mike last week and his sealed enclosue was exactly the same, lol. I guess the smallest enclosures work better in extreme builds. Audiobuffru1, I am using one amp and all 4 boxes are separate. Did some testing and gained about a db and a half from moving the boxes up about 18". The frequency is now 64! Today was a very positive day though. As Justin and the others have stated, I have to enlarge my sealed enclosures. The baffle will removed and built over. Because the seats don't fold or slid forward too much, I am leaning towards a center port. I would like to be somewhere between 38-42 hz. Gentlemen, I really appreciate all the advice and please, keep them coming.
Posts: 639 | From: Connecticut | Registered: Apr 2009
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quote:Originally posted by Old/School: Justin I think the other probe is the tuning of the sead boxes I think that the wall is not big enough for 4 18 `s that the sealed box vol. in the walled part the vol. of the sealed is to much. He needs to try every option I know the sealed boxes are to small. I bet the sealed boxes with 15s will wange. I just think that 2 18 `s with the proper vol. is going to work way better if he had a 4 12s I think it would work better then the 4 18 `s I also think that the cone flex under pressure in that wall is to much as well and with a 12 there will be less stress on the outer cone.
He need to talk to Mike Bartells on how he did his sealed box he used two 15 `s in a moveable sealed box if I remember right. I think I still have PICS of the build that he sent me at one time just have to find them and get the OK to post them.
TJ, I spoke to Mike last week and his sealed enclosue was exactly the same, lol. I guess the smallest enclosures work better in extreme builds. Audiobuffru1, I am using one amp and all 4 boxes are separate. Did some testing and gained about a db and a half from moving the boxes up about 18". The frequency is now 64! Today was a very positive day though. As Justin and the others have stated, I have to enlarge my sealed enclosures. The baffle will removed and built over. Because the seats don't fold or slid forward too much, I am leaning towards a center port. I would like to be somewhere between 38-42 hz. Gentlemen, I really appreciate all the advice and please, keep them coming.
hummmmmm mikes 4th order seald box was for two 15`s and commin chamber avery still has it.
-------------------- TEAM XTREME LOUD AUDIO THE LOUD CROWD Team Dc Sound Labs. Posts: 2781 | From: Springfield Ma | Registered: Apr 2004
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posted
ya but mike sent avery his test box and it was a commin chamber with 2 15`s
-------------------- TEAM XTREME LOUD AUDIO THE LOUD CROWD Team Dc Sound Labs. Posts: 2781 | From: Springfield Ma | Registered: Apr 2004
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-------------------- TEAM PINNACLE TEAM SOUTHEASTSPL TEAM POWERMASTER TEAM SOUNDSTREAM Posts: 2678 | From: Everywhere | Registered: Oct 2004
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posted
Question for all the folks helping me. By increasing the volume in my sealed boxes, I know it will help bring the frequency down but could it also help in bringing the numbers up? Comments please.
Posts: 639 | From: Connecticut | Registered: Apr 2009
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posted
No program friend, just kinda winging it. Actually the build last year, the sealed chamber was 10^3 and the ported was 30^3. This build is louder with less power.
Posts: 639 | From: Connecticut | Registered: Apr 2009
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posted
If it helps ya at all for some reason when I built mine I must have missed a step some where along the way. I have 12's in 2 cubes each. From 1 cube to 2 cubes was over a 2Db gain. It sounds realy funny but I'm louder with my seats in driver side slid foward all the wat and I have a driver side port. Tell me where the justice is in that.
I know mines realy messed up some where but I was able to make it work. You might have a problem like I do. Just try stupid things that in your head you know they shouldn't work......I gained 6Db from these things that I knew shouldn't help and others have failed trying. I guess each build truly is 1 of a kind.
posted
Pete, I'm hoping that I have the same situation, lol. By increasing the sealed box volume, hopefully, I will gain a few. I greatly appreciate your help.
Posts: 639 | From: Connecticut | Registered: Apr 2009
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Made a temporary back wall that can slide in and out. Hopefully, this will help me find the best internal volume for the sealed enclosure.
Posts: 639 | From: Connecticut | Registered: Apr 2009
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-------------------- TEAM XTREME LOUD AUDIO THE LOUD CROWD Team Dc Sound Labs. Posts: 2781 | From: Springfield Ma | Registered: Apr 2004
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posted
looks good brother keep up the good work ..
maybe i will see you around i made it up north driven the van 1148 miles from florida .
had no problem through out the trip .
-------------------- TEAM PINNACLE TEAM SOUTHEASTSPL TEAM POWERMASTER TEAM SOUNDSTREAM Posts: 2678 | From: Everywhere | Registered: Oct 2004
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posted
Looking good Bernie! Let me know what it hits now. You got a good 158+ in there somewhere with the door open in your format. be sure to tune with vehicle in the exact configuration as the competition. Your making me want a BP in my own ride. lol
-------------------- -Donald Hebig -All Out S.P.L. Saskatchewan's dB Drag event promoter -Check the Termpro homepage partners for the companies I support. Posts: 2589 | From: Borden, Saskatchewan. Canada | Registered: Feb 2000
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