Is anyone running just one tempest for their IB. I know it is not ideal but I have one right know I can use. I currently have a 150 liter sealed enclosure, and wanted to know if the one tempest in an IB would be comparable? Do you only run one voice coil? I actually wanted to make something like this: http://users.rcn.com/mjrjunk/Sub1.jpg but only one side. Think that would work?