JWC Bass Horn in Technical/Modifications Posted March 2, 2017 I can get B&C 12nw100, what do you guys think about it? I think I should get 4ohm version and wire in series to get 8ohms. However it is only 92db efficient around 120hz. Two of them will get me 95db and the horn is supposed to add another 6db, which would be 101db. This wont be happening lower than 120hz though... How much volume I need in the chamber for these woofers and as these were mainly designed for bass reflex, do you think it would be a problem?