I used DRA Labs’ MLSSA system, a calibrated DPA 4006 microphone, and an Earthworks microphone preamplifier to measure the Genelec G Three’s frequency response in the farfield. I used an Earthworks QTC-40 mike for the nearfield responses.
Genelec specifies the G Three’s input impedance as 10k ohms. As this is an active loudspeaker, I calculated the input impedance by using spot frequency tones generated by my Audio Precision SYS2722 and examining how the nearfield sound pressure level dropped when I increased the source