OMG, I cant believe my ears. I have not put this thing thru the true test yet (a live show) but so far I am very impressed. The tone controls on this unit are very powerful. you don't need to add very much of anything to get a kick ass sound. So far my favorite features are the tube blend and the enhance control. I am using the navigator with a QSC PLX 1602 and a Schroeder 1212 and 1210. It really makes my Modulus Quantum shine. Anyway, I will give a full review once I put it through the paces, but so far so good.