I finally got around to doing a little more testing with the two subs - with a little more precision. As pointed out by several of you, the subs have different scales. Two other interesting notes: as pointed out by ihifi the newer sub doesn't have as high a top end as the older EP-500, and second, both subs top out at the 12:00 position even though the dial has another 2:00 play before it reaches max. I don't see either of these factors having any effect on the way I use my rig. I am just a bit acedemically curious about what happened to the extra power on the new sub?

I didn't post the SPLs as it seems apparent that everyone would likely get different results for a bunch of different reasons. But if someone wants them let me know.

Thanks
Ian