the older l-7 8 is absolutely amazing for an 8......it does get low, and that is always the most important thing i look at in a sub. i was really amazed what they do in a sealed box, but vented boxes are the best. in my experience, there is minimal change in performance for the last 11-12 years they have been out. the newer ones can be bottomed out easily, so be careful...and, if you are thinking about going up to a 10- remember, the 8 really is a 10 by design. i have the 8 installed in my single cab 95 sonoma, by the way, and it shakes the house on a 400 watt pg titanium