What is the displacement for an 18'' Nightshade? Couldnt find it on the site. Also, how much room behind the pole does it need to vent in the box? I was thinking a few inches is good?

for the 15inch it is .4 displacement and 9.75 mouting deth i thought the same motor was used on the 15 as the 18! but i could be wrong! and i also used 2inch beind the pole!

Edited December 20, 200915 yr by CrazyKenKid

for the 15inch it is .4 displacement and 9.75 mouting deth i thought the same motor was used on the 15 as the 18! but i could be wrong! and i also used 2inch beind the pole!

Thanks. So im looking at about .5 cubic ft. displacement out of the sub?

for the 15inch it is .4 displacement and 9.75 mouting deth i thought the same motor was used on the 15 as the 18! but i could be wrong! and i also used 2inch beind the pole!

Thanks. So im looking at about .5 cubic ft. displacement out of the sub?

Just email jacob at [email protected] to get a legit answer or just search through this thread and the other pages. You will find a topic with this information in it also.

nvm

Edited December 20, 200915 yr by CrazyKenKid

or ask this guy Flipsid

the guy who did the 12-18inch build! i am sure he knows the displacement.. maybe lol!! but jacob is yoru best bet!

.5 sounds like way to much. Just looking at a similar sized sub the IA DP 18 is only .25.