There is RTA, or RealTime Analysis. I've done it, and it works, but it's a pain in the you-know-what. It involves using a PC with spectrum analysis software, combined with a calibrated microphone and test tones, to get rid of any nasty peaks and valleys in your spectrum.

Now, something to keep in mind. If you're running version 2.0 beta 11, and you've been playing with the Q values, you must understand that custom Q values are only working for one channel. The other channel is getting a Q of zero. This is a known bug in 2.0 beta 11.

This might account for some of your reported behavior.

If you want to work around this bug, either set the Q value independently for left channel and right channel, use the automatic Q values, or downgrade to non-beta 1.03.

If you're looking for a treatise on what the Q actually does, click here.