Disbelievers think there must be a catch - there isn't, the Kemper really is that good! This unit is the rack mounted, non powered amp version of the revolutionary Kemper Profiler. The Kemper Profiler enables you to do what generations of guitar players have been waiting for: to capture the soul of all your amps (and so many more) inside a lunchbox-sized amplifier. So, how does it work? Cutting edge technology captures the sonic DNA of virtually any guitar amp. The resulting profiles are as living, vivid and dynamic as the original amps.