What is "versatone"

Versatone is a brand of musical instrument amplifiers manufactured from a plant in Van Nuys, California during the 1960s and 1970s. Versatone amplifiers were owned, designed and produced by inventor G. Robert Hall and his wife Loretta S.Hall. Versatone Amplifiers are still owned by Loretta Hall and the rights were never sold off to anyone.

Its singularity arises from the use of an almost high-fidelity amplification system that rendered good detail in live and recorded applications, its repute as a "secret weapon" among early and current session players, and its rarity in terms of volume of sales.