I built this in 2000, I was trying to design a really high-end guitar preamp that would saturate like a tube amp, but this definitely wasn't it! Oddly, the unit acts like it has a tube, in that it takes several minutes to warm up, and it has tons of background hiss. But the best thing about it is the intermodulation it produces when you drive it hard (like with a modular synth that clips everything), if you have two sounds and you turn one up, it totally swallows the other one. It's beautiful and terrifying too.