1 jan 1939 ano - spring reverb

Descrição:

Laurens Hammond was granted a patent on a spring-based mechanical reverberation system in 1939
A spring reverb system uses a transducer at one end of a spring and a pickup at the other, similar to those used in plate reverbs, to create and capture vibrations within a metal spring. Guitar amps frequently incorporate spring reverbs due to their compact construction and low cost.