Simplifier features a 100% true analog preamp that recreates with obsessive detail the most useful and popular clean channel preamps in the market AC BRIT: Classic AC30 sparkly and tridimensional sound. A true British heritage since the 60's. AMERICAN: Classic blackface deluxe sound. Sweet and dynamic with a balanced response. By far the most used amp on studio recordings MS BRIT: Classic clean-to-crunch vintage plexi style amp.