Katzenkönig was tuned to offer a huge range of response from a really beautiful singing tone, to tight, harmonically-rich crunch, all the way to fuzz mayhem. A simple, four-knob control scheme allows you to dial in your sound quickly and without much fuss: INPUT Controls the input sensitivity. Turn it down when using higher output pickups and humbuckers or to dial in your wah sound (more on that later). Turn it up for lower output pickups or for when you want to go over-the-top! GAIN Controls the gain of the second gain stage. It is not a conventional gain control, rather, it controls the amount of negative feedback in that stage. What does that mean for you? It means you get a wide ranging gain control that sounds great throughout its entire rotation! FILTER Allows you to dial in your final tone from smooth and creamy all the way to bright and cutting. You can quickly find the sweet spot for your rig with this control. If you are familiar with the Filter control on a Rat then what youll find is that this is an even better version of that idea! VOLUME Standard volume control. Youll find that Katzenkönig sounds great turned down quiet or cranked up and loud!