Have you found that the ouput from the empeg itself is flat, or does it add it's own colorations?

Although this has been mentioned several times before, I have verified this personally with the SpectraLAB software: The RCA outputs of the empeg are absolutely RULER-FLAT across the entire spectrum.

I checked this by creating a set of combined overlapping frequency tones and saving those to a .WAV file. Each tone should look like a "spike" on the spectrum analyzer, with the peaks all being in the same place.

I plugged the empeg's RCA outputs into the mic input of my sound card, and after messing with the levels to get it all right, ran the SpectraLAB program and looked at the output from this WAV file playing on the empeg. Absolutely ruler-flat across the spectrum, the peaks were all exactly at the same level.

But my purpose for doing this wasn't to verify that the empeg's outputs are flat, we've already known this for a long time. What I needed to do was to find the holes in the amps/speakers/environment of my car. This is what equalization is all about. I've been doing this by ear for a long time, I just wanted a machine to verify what I think is a good EQ curve from my player. My first attempt had some snags, and with what I've learned, I'm going to try again this weekend.