Check this 4th order measures please!

[fecupe2001]

Hey guys, i don´t know how to use any sketching program or anything but it´s ok, i just want you to check the size and ratios of a 4th order i´m designing for my friend´s nissan almera, i´ve designed and built lots of boxes before, and also, a few Bandpasses but nothing major, i just want to double chek with you guys, few heads thinks better than one

Anyways, the box is for 4 Digital designs 2515 , it´s gonna use about 6000 watts, we don´t know yet.

3:1 RATIO

24 cubic feet after displacement.

6 cubic feet the rear chamber, 1.5 cubic feet per each 15" sub

18 cubic feet the front chamber with 370 SQ of port , 20 SQ per cubic feet tuned @ 45 hz

This is meant for hairtricks, demos and daily listening, maybe i´ll build another port for comps, don´t know yet, but main goal with this design it´s to have a very good musical box that still scores a nice number

Sounds good? any comment, opinion and advice are welcome, i don´t wanna mess up and lose tons of money and time building this hehe, cheers!!!

Edited November 15, 2010 by fecupe2001

[Steph3n1]

Hey guys, i don´t know how to use any sketching program or anything but it´s ok, i just want you to check the size and ratios of a 4th order i´m designing for my friend´s nissan almera, i´ve designed and built lots of boxes before, and also, a few Bandpasses but nothing major, i just want to double chek with you guys, few heads thinks better than one

Anyways, the box is for 4 Digital designs 2515 , it´s gonna use about 6000 watts, we don´t know yet.

3:1 RATIO

24 cubic feet after displacement.

6 cubic feet the rear chamber, 1.5 cubic feet per each 15" sub

18 cubic feet the front chamber with 370 SQ of port , 20 SQ per cubic feet tuned @ 45 hz

This is meant for hairtricks, demos and daily listening, maybe i´ll build another port for comps, don´t know yet, but main goal with this design it´s to have a very good musical box that still scores a nice number

Sounds good? any comment, opinion and advice are welcome, i don´t wanna mess up and lose tons of money and time building this hehe, cheers!!!

looks pretty good you probably wont need that much power tho 3:1 ratio 4th orders are really really efficient.. how are you planning on mounting the woofers? like in a V?

[uhoh_45]

sounds solid just like my 4rth order spec wise give or take couple cubes ported and i was tuned higher 60 hz yet peaked in the lower hz's

[fecupe2001]

looks pretty good you probably wont need that much power tho 3:1 ratio 4th orders are really really efficient.. how are you planning on mounting the woofers? like in a V?

Thanks a lot for the input man, i fucking hate not knowing how to use a sketching program, i´ll have to learn hehe, anyways, i still don´t know how i´m gonna mount the subs yet, it´s a trunk car, i have two options , mounting them on the "floor" of the box just like rival´s design, or, getting them on the back of the box with a vertical port on the center of the car, i can´t get the port on the driver´s side because this car is gonna compete on bass race, and over here, we bass race with driver´s door open.

If the sealed chamber it´s on the back, i guess i´ll have to mount them on "zig zag" , i´ll take care of that later, first i want to be sure on the measures , i actually want to build a flat wall because of the space, but he wants something different tho.

[fecupe2001]

sounds solid just like my 4rth order spec wise give or take couple cubes ported and i was tuned higher 60 hz yet peaked in the lower hz's

you think it´s solid?? nice to know that then, yeah i´m building the port kind of big so i can shrink it and test, my 2512´s doesn´t like big port at all in my explorer, so that´why i want to be able to test port area a little bit on this 4th order

[uhoh_45]

check out my build log it might benefit you - explorer - 4-15s - 4rth order bandpass

[fecupe2001]

i´m gonna check it hommie, but my explorer it´s gonna get 4 3518´s (i´m already using two in the suzuki swift) on a flat wall i guess, i don´t think i have the room for a 4th order and 4 18´s there hehe, still, gonna watch it and see if i can steal some ideas from you hehe, i´ll let you know

[fecupe2001]

Morning BUMP question, what about the sealed box? should i do common chamber or each sub on it´s own box?? it´s gonna use a single amp by the way.

[uhoh_45]

keep the sealed box's separate

if your looking for numbers 4rth orders take lots trial and error

the A-team had explained bunch bout his 4rth order ( 6 lvl 5 12s) that you do separate chambers so you can fine tune each sub individually

say one chamber is 1.4 cubes where another could be 1.3 and so on

i know with my box's i built them to 1.5 and found they liked smaller sealed box's so i ended up shrinking the box's to 1.35sh by adding bunch 2x4s on the inside of my box's to shrink them

hope this helps

[fecupe2001]

Yes sir, it helps a lot, where can i find clay´s posts? i love the jimbo!! last night i watched your whole build log, very nice work man, the explorer is playing? i think you said you were gonna ditch that car.