I have used the FV12 before, looks to be similar if not same driver as L12, so I have seen what that driver can do. While it has a good amount of throw, I would not qualify it as a high excursion driver. While I am not 100% sure that the SVS 2000 driver has greater xmax, I would be willing to bet a good chunk of money that it does. To hit 108 dB at 40 Hz means the 2000 driver has to have at least an inch of linear peak-to-peak excursion. That matches the Peerless XXLS spec of 12.5 mm xmax. While that isn't exactly huge excursion either, it isn't terrible for a 12". If you have a Rythmik sub that uses this driver, place a piece of tape on the dustcap, set up a mic with an RTA near the woofer, and run a deep frequency tone, and you can kind of get a feel for the xmax by eye-balling it, or better yet, take a picture from a camera in a static position with the tape on the dustcap at rest and a ruler in front of it, than take a pic from same exact position with the woofer at maximum linear throw and camera at long enough exposure to capture the whole throw, and compare the pics. Use the RTA like the one in REW to make sure the playback stays linear, and when it gets out of hand, you are past xmax. Also I will not be held responsible for any damages incurred if you try this!
