Potentiometer adjustment dials for consumer products, namely, guitar amplifiers, electronic effect pedals for use with sound amplifiers, sound amplifiers, powered speakers, public address system heads, sound mixing boards, and towered speakers; potentiometer adjustment dials for electrical music apparatus, namely, sound amplifiers and loudspeakers, and for components and accessories for such electrical apparatus, namely, for electric foot pedal controls, amplifier knobs, and electric amplifie...