I have a great Idea!! Look inside to find out more....
Hey guys...i have 2 earthquake dbx's 15" and a d2 to power it...its just that my car is very tricky...i drive a 94 mx6 and the trunk configuration allowes no boxes! right now i built a custom box for just one of the dbx's...and i think the only way i can get 2 in...is if i face them up! i was just wondering what i should do...if maybe i should sell those 15s and go for 12s or if anyone has any good building ideas. well shoot me whatever. pm me or e-mail me at bigeman19@hotmail.com. thanks
Eric
Eric
500 Watt CAFz'r
Joined: Apr 2000
Posts: 890
Originally posted by orion:
what you can also try is to make braces inside the box. This will need to be tested of course but if you make braces out of MDF that are inside of the box this will add rigidity and will also break up any standing waves inside. again this all depends on how large the box is, obviously if you will need to have braces that are 40" long and only .75" thick..... I should not have to explain what would happen there. I have never tried this my self but in 2002 Riprock used boards to break up waves inside the enclosure and it was a large box. If you are going to try this in big boxes just use a material that is non porous, and if you do use MDF I would suggest you coat it with resin first. TEST TEST TEST!!!! some boxes will want to flex and by adding bracing your SPL will go down so make sure you document what happened in both cases.
what you can also try is to make braces inside the box. This will need to be tested of course but if you make braces out of MDF that are inside of the box this will add rigidity and will also break up any standing waves inside. again this all depends on how large the box is, obviously if you will need to have braces that are 40" long and only .75" thick..... I should not have to explain what would happen there. I have never tried this my self but in 2002 Riprock used boards to break up waves inside the enclosure and it was a large box. If you are going to try this in big boxes just use a material that is non porous, and if you do use MDF I would suggest you coat it with resin first. TEST TEST TEST!!!! some boxes will want to flex and by adding bracing your SPL will go down so make sure you document what happened in both cases.
" worked awsome on the old mics, but for pressure not so much. We used 2 by 4`s last year in the civic to brace a back part of a wall but you could not see it. If you do decide to brace try not to brace in the box if you can, try on the outside part first.And if you have to on the inside use rod or anyything, but make shure it`s rounded.
50 Watt CAFz'r
Joined: May 2004
Posts: 88
since we are all in the sharing mood any suggestions on my set up its in a 2001 KIA Sportage I have a Pioneer 9400MP, juggernaut 15 with dual 1.8 ohm coils and is being run by a hehehehehehe Ultralinear UL1500XS ( quite an impressive cheap amp, Used to run a Mmatts D100hc and it seems like this amp is quite comparable if not slightly better for this setup anyways ) my cargo space I have to work with is 40" between the wheelwells side to side and 30" deep 25 if i want leave room for the port to breath I can go 16.5" high max and the stuff i've figured out already is that my vehicle is loudest with sub firing back versus up and the peak frequency is 58hz. I think I'm on the right track here but thats what this post is for, to learn so if there is anything i'm missing some input would be great. Also I'm shooting for street B. Thanx guys.
[ January 21, 2005, 12:21 AM: Message edited by: The dude formely known as SPL-Z24 ]
just thought I'd post my last question that went un answered..............no big deal.
but as an update .. Went to the test and tune and maxed out at 140point sumthing this was with
Xiph0id's suggestion to move the box further back about 3-4 inches from the rear of my vehicle. Thanx man for all the help.
now according to termlab the loudest note in my car was 50hz all i can figure is when i tested my frequency i must have been wrong. but any input would be greatly appreciated. Since then i added angles to the inside of my box in the places you reccommended Xiph0id with the aid of cardboard templates and fiberglass matt and resin, and i also did that port thing but i also cut down the length of my port dramatically which i shouldn't have done at the same time cause i lost big time so i'll have to rebuild the port and see what happens from there. so should i be tunning my box with 50hz in mind as my res frequency or should i go back to the drawing board and find out what the hell is going on any help would be greatly apprciated thanx guys. I know my sub can be way louder than what it is now so any ideas etc or as a last resort box designs would help.
[ January 21, 2005, 12:21 AM: Message edited by: The dude formely known as SPL-Z24 ]
just thought I'd post my last question that went un answered..............no big deal.
but as an update .. Went to the test and tune and maxed out at 140point sumthing this was with
Xiph0id's suggestion to move the box further back about 3-4 inches from the rear of my vehicle. Thanx man for all the help.
now according to termlab the loudest note in my car was 50hz all i can figure is when i tested my frequency i must have been wrong. but any input would be greatly appreciated. Since then i added angles to the inside of my box in the places you reccommended Xiph0id with the aid of cardboard templates and fiberglass matt and resin, and i also did that port thing but i also cut down the length of my port dramatically which i shouldn't have done at the same time cause i lost big time so i'll have to rebuild the port and see what happens from there. so should i be tunning my box with 50hz in mind as my res frequency or should i go back to the drawing board and find out what the hell is going on any help would be greatly apprciated thanx guys. I know my sub can be way louder than what it is now so any ideas etc or as a last resort box designs would help.
Originally posted by The dude formely known as SPL-Z24:
since we are all in the sharing mood any suggestions on my set up its in a 2001 KIA Sportage I have a Pioneer 9400MP, juggernaut 15 with dual 1.8 ohm coils and is being run by a hehehehehehe Ultralinear UL1500XS ( quite an impressive cheap amp, Used to run a Mmatts D100hc and it seems like this amp is quite comparable if not slightly better for this setup anyways ) my cargo space I have to work with is 40" between the wheelwells side to side and 30" deep 25 if i want leave room for the port to breath I can go 16.5" high max and the stuff i've figured out already is that my vehicle is loudest with sub firing back versus up and the peak frequency is 58hz. I think I'm on the right track here but thats what this post is for, to learn so if there is anything i'm missing some input would be great. Also I'm shooting for street B. Thanx guys.
[ January 21, 2005, 12:21 AM: Message edited by: The dude formely known as SPL-Z24 ]
just thought I'd post my last question that went un answered..............no big deal.
but as an update .. Went to the test and tune and maxed out at 140point sumthing this was with
Xiph0id's suggestion to move the box further back about 3-4 inches from the rear of my vehicle. Thanx man for all the help.
now according to termlab the loudest note in my car was 50hz all i can figure is when i tested my frequency i must have been wrong. but any input would be greatly appreciated. Since then i added angles to the inside of my box in the places you reccommended Xiph0id with the aid of cardboard templates and fiberglass matt and resin, and i also did that port thing but i also cut down the length of my port dramatically which i shouldn't have done at the same time cause i lost big time so i'll have to rebuild the port and see what happens from there. so should i be tunning my box with 50hz in mind as my res frequency or should i go back to the drawing board and find out what the hell is going on any help would be greatly apprciated thanx guys. I know my sub can be way louder than what it is now so any ideas etc or as a last resort box designs would help.
since we are all in the sharing mood any suggestions on my set up its in a 2001 KIA Sportage I have a Pioneer 9400MP, juggernaut 15 with dual 1.8 ohm coils and is being run by a hehehehehehe Ultralinear UL1500XS ( quite an impressive cheap amp, Used to run a Mmatts D100hc and it seems like this amp is quite comparable if not slightly better for this setup anyways ) my cargo space I have to work with is 40" between the wheelwells side to side and 30" deep 25 if i want leave room for the port to breath I can go 16.5" high max and the stuff i've figured out already is that my vehicle is loudest with sub firing back versus up and the peak frequency is 58hz. I think I'm on the right track here but thats what this post is for, to learn so if there is anything i'm missing some input would be great. Also I'm shooting for street B. Thanx guys.
[ January 21, 2005, 12:21 AM: Message edited by: The dude formely known as SPL-Z24 ]
just thought I'd post my last question that went un answered..............no big deal.
but as an update .. Went to the test and tune and maxed out at 140point sumthing this was with
Xiph0id's suggestion to move the box further back about 3-4 inches from the rear of my vehicle. Thanx man for all the help.
now according to termlab the loudest note in my car was 50hz all i can figure is when i tested my frequency i must have been wrong. but any input would be greatly appreciated. Since then i added angles to the inside of my box in the places you reccommended Xiph0id with the aid of cardboard templates and fiberglass matt and resin, and i also did that port thing but i also cut down the length of my port dramatically which i shouldn't have done at the same time cause i lost big time so i'll have to rebuild the port and see what happens from there. so should i be tunning my box with 50hz in mind as my res frequency or should i go back to the drawing board and find out what the hell is going on any help would be greatly apprciated thanx guys. I know my sub can be way louder than what it is now so any ideas etc or as a last resort box designs would help.
and I believe you mentioned a single 15" jugg with aprox 1500 watts RMS? or max? maybe I can help you if you can give me those details...plus the length in inches from your rear hatch window(at center) to front windshield(at center)
should be hitting atleast 146-147(maybe more) with 1500watts RMS
