3A60.40 Driven Mass on a Spring
Hang the speaker driver from a stand facing down and attach a spring/mass system of known frequency to the mount. Setting the frequency of the signal generator to less than or equal that of the spring/mass system yields in-phase resonance. Setting it to a higher frequency yields out-of-phase resonance.
Location: Signal Generator: Q1-4; Spring & Tube: F3-1; Mechanical Driver: E3-3