Kemper Profiler PowerHead Advanced Amplifier Control The Amplifier section is the heart of the Kemper Profiler. The sound of the amplifier is based on the profile loaded into the rig. A great selection of intuitive and powerful macro parameters empowers you to perform modifications which are impossible with a traditional hardware amplifier. Many things become possible from changing the age of the virtual hardware to the response to your play. You gain direct access to tube settings, such as the