Not a bass amplifier, not a bass amp modeler, the Tech 21 SansAmp RBI is one of those super-cool gadgets that pretty much defies conventional categorization. You see, most of modelers or simulators are designed to provide you with the sound of such and such famous amp with varying degree of success. Not the SansAmp RBI. Don"t get me wrong, this puppy is so versatile that you can make it sound like all sorts of well known and loved amps - in fact, it includes dial placement settings that let you get SVT-style, Bassman-style, King"s X-style, Crimson-style, and more classic tones - but it"s far from limited to only those tones. A full set of tone controls lets you dial in just the sound you want, so you can get really creative and come up with your own tone.