In a time of every-other-month upgrades, the SansAmp PSA has been modified only once in 21 years, and primarily to add hardware features. This is a powerful testament to the unusual longevity of the SansAmp PSA. Combining a warm, all-analog signal path with digital recall, it offers 49 factory presets of the most recognized vintage and modern tube amp sounds for guitar and bass, and 77 user-definable locations.
