I remember this being talked about at some great length (having the empeg auto-calibrate itself to a flat frequency response via the Line-In and some device with a mic-in and line-out such as a RadioShack SPL meter). Are we at the point now where we understand the empeg enough to start talking about this again?

Yes, I know that a flat EQ response is not always the best sounding thing, but it at least gives us a good baseline.

If this isn't possible, how about a something that worked with a SPL meter... See, when I listen to a frequency sweep on my empeg, I can watch my SPL meter and go "Yep, there's a dip here and a spike there," but I have no idea what the frequencies are.. Maybe a visual or something that would tell you what frequency you are at...? Just thinking out loud here...