If anyone has some great tuning techniques they would like to share around RTA's that would be welcome too. I think I mentioned that I use the FFT RTA to get things initially as close to flat as possible, then use a sine generator to slowly sweep from low to high looking for where my ears begin to reel from shrill...I knock those freqs down quite a bit cause they are perceived so much louder and harmful. Those freqs seemed to be at 315, 1.2K, 2.6K and 4K. I certainly could use a bit more time with the system to keep tweaking...it's still pretty new.