That is a good point, but It happened at any volume. Also, the eq on the empeg is left flat and I pretty much just use my kenwood head unit for equalization settings for convenience.

I was wondering if it was the encoding of the MP3's and was going to slap V3Alpha8 on it to play some FLACs of the offending songs, but just haven't gotten to it yet.

The behavior that I described occurred mostly on stuff like jazz where the voice is louder than everything else or a rather clean-sounding instrument was soloing like a spanish guitar.