In the Drive Series, AMT uses new original circuitry solutions developed by AMT specialists based on real actual tube stage emulation and response. The result is bright, rich, full, and powerful distortion sounds. The AMT S-DRIVE was designed for guitarists looking for distoriton sounds similar to that of Soldano amplifiers. When using Drive Series Effects, the resulting sound is mainly influenced by the combo or amplifier you use, as well as the speakers installed in your cabinet. The Drive Series were designed for guitarists who do not need or desire the speaker emulation of the Legend Amp Series. Drive Series pedals provide massive gain, and tonal perfection; just as the tube heads they represent!