Warm Audio's clone of a Neve 1073 at a killer price, so far it works with really well with every mike I've thrown at it- 57's, MD421's, Royer R121 ribbon, Sennheiser E609, AKG414, Neumann TLM107, and a Bock 195. 80+ db of gain, so its got plenty for ribbons, and gets that sweet color and sheen...