hitting the lows

[massivespl]

i had a DD 9518 and it was an older one and i blew it.that sub was awsome and hit the lows.i used the box that it was in a 7 cubic foot box tuned to what DD said to tune it for my SUV and i put a atomic X 18 subwoofer in that box and it just does not hit the lows?like the sub is flexing alot but not getting loud on the lows.do you think the box is wrong because it was built for my DD?

Click to read more...

 

[l7runner 10+ year member]

i had a DD 9518 and it was an older one and i blew it.that sub was awsome and hit the lows.i used the box that it was in a 7 cubic foot box tuned to what DD said to tune it for my SUV and i put a atomic X 18 subwoofer in that box and it just does not hit the lows?like the sub is flexing alot but not getting loud on the lows.do you think the box is wrong because it was built for my DD?

you have to figure out your box tuning.

DD usually reccomends a higher tuning than most...try tuning around 33hz and that should bring the lows out

 

[massivespl]

the box is 7cubic feet.it is 25 inches deep.the port is 8 inchs wide.14 inches tall.and the port wall is 16 inches deep.how do i find out what its tuned too?

 

[l7runner 10+ year member]

if those numbers are correct you are tuned around 40hz +...pretty high for a daily driver for an atomic.

you would need the port to be like 25inches long to get the tuning down into the mid 30's.

here is an easy to use box calculator, should have everything you need to design a box

http://www.the12volt.com/caraudio/boxcalcs.asp