I used one with my Plexi. It was a must because it was crazy loud. It's a nice unit and is built like a tank. It sounds pretty transparent at -4db & -8db settings but starts compressing you tone a little above that but ALL of them do with real heavy attenuation. I used it's line out to reamp and add my time based effects too. I sold the Plexi and don't really need it with my Vintage Modern so I don't really use mine any more. It's a nice tool, enjoy it.