Does anyone have a suggestion for displacement volume for a 99 jbl 12? I know the specd vol is 1.125cubed but just wondered if anyone had any exper with this speaker. Im trying to fit 2 in the area that is slightly raised in the trunk, but at 1.125 x 2 I just cant get it in the way i want, and i hate to drop to 1 sealed enclosure 12. ulness...hmm just thought, anyone have any idea how this speaker would perform replacing the stock 12 in a gs4? and how would an amp react to runing one channel to a free air setup and one channel to a sealed enclosure??