 The SansAmp was unique in that it introduced the concept of amp-modeling, that is, emulating a variety of different amplifiers and enabled recording direct to a mixing console.Later, SansAmp became an entire line of products for various instruments and applications.Tech 21 offerings include the Fly Rig® Series, artist signature gear for Geddy Lee, Richie Kotzen, Paul Landers, dUg Pinnick, and Steve Harris.