Bought it with SM7B to use as a mic booster. Didn't like what SM7B does to my voice, will be returning it. This thing though - it stays, because it is freaking AWESOME. I use it AFTER my hardware compressor and tube EQ as distortion/tone machine to get that 1964/65 Abbey Road sound - bright, crunchy goodness! What it does to my drums, gutars and voices after being pushed with lots of gain from my Klark Tekniks is simply amazing and isn't possible to replicate with any plugin that I've ever heard. This is probably the cheapest and simplest alternative to that Chandler Limited unobtanium preamps you've been dreaming about.