Question

who is the inventor of bass boosterzz ...?

Answer 1

i think leo fender is the inventor of bass booster 

Answer 2

In 1542, Silvestro Ganassi developed a bass viola da gamba in Venice, which is often regarded as the “progenitor” of the double-bass. Its sloping shoulders, frets and six strings tuned mainly to fourths (D2, G2, C3, E3, A3, D4) indicate that low bowed instruments emerged originally from the gamba family