MEASUREMENTS

I used DRA Labs’ MLSSA system, an Earthworks microphone preamplifier, and a calibrated DPA 4006 microphone to measure the MayFly MF-201’s farfield behavior, and an Earthworks QTC-40 mike for its nearfield responses. I used an Outline computer-controlled turntable to examine the off-axis behavior, rotating the loudspeaker under test in 5° increments.

Though MayFly specifies the MF-201’s sensitivity as 88dB/W/m, my estimate was significantly lower, at 83dB(B)/2.83V/m. While the MF-201’s impedance is specified as 8 ohms, the impedance magnitude (fig.1, solid trace) measured with Dayton Audio’s DATS V2 system remains above 10 ohms for almost all the audioband,