Opinions on this 4th order for 4 sundown zv3 15"s.

[MrSkippyJ]

a flat wall can be a ported box, lets get that out of the way.

if you want a 28cube 4th, it will be a wall, and probably flat too.

4th orders aren't magic.

[mrlovethatbass21]

Ok guys listen there are no rear seats in my truck my box goes from the back door to my front seats. So I don't have room to cram four. 18"s in a wall, box building is about effiency not always cone area. I'm doing a build based on someone who only has four 15"s and doing 160s on music. Do I expect to do a 60 no!!! But I will bet my last dollar that the 4th order with the four 15s will be way louder than the ported box I have now.

[MrSkippyJ]

but you do have room for the 18s in a wall. this part i don't understand.

[mrd6]

Of course it will be louder than the ported box you have now, the box you have now is not a wall and is too small...I bet the same subs in a proper ported wall will be louder than what you have too and probs louder than the 4th. Do you get what we are saying?

[mrlovethatbass21]

@skippy do you no what a 4th order is, it's a 4th order wall. And it's been proven that a 4th is more musical than a flat wall, do the research

[mrlovethatbass21]

I understand what your saying about the flat wall but you guys don't understand that I don't have room for a flat wall with 18"s. I only have a 36-37" height in the jeep .

[mrd6]

Right, but the thing is, you could angle the baffles to get your extra height you need and fit them.

But, it sounds like you are set on a 4th. How much ar space are you planing to have sealed per 15? What are you going to tune to?

[TRTC360]

i'd say go for the 15's, nic watts swapped from 15's to 12's in his 4th order and gained quite a bit on the meter. Not sure why everyones arguing about what's louder on the meter. Look at scott bowmans 6 15's 4th order, 3:1 ration iirc and he does 63's, then look at keith millers 4th order, 2:1 ratio and it does 62's iirc and moves some crazy air.

[MrSkippyJ]

you are stuck on a flat wall, it doesn't have to be flat. make it a clam shell or some other style. There is no way you would ever convince me to go 4 15s over 4 18s based on your goals. I think you are stuck on some non-existant magic about 4th order enclosures.

[MrSkippyJ]

Right, but the thing is, you could angle the baffles to get your extra height you need and fit them.

But, it sounds like you are set on a 4th. How much ar space are you planing to have sealed per 15? What are you going to tune to?

he said 5.25 per ported and 1.75 per sealed.