This thing is amazing at this price point. If this is what pro audio sounds like, then I am hooked. After upgrading to a Joemeek ThreeQ a few months ago for vocals I was still not satisfied with the results. I went back in to get a better preamp. I grabbed the ISA One and man there is a night and day difference in audio quality. The ThreeQ has edgy and crunchy highs and a small bottom end. The ISA One has silky highs and a fat and full bottom. I have met the breaking point between amateur and professional vocals.