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  • Stereophile

    MEASUREMENTS

    Mar 10, 2020 4 minutes
    —John Atkinson

    I used DRA Labs’ MLSSA system and a calibrated DPA 4006 microphone to measure the Vimberg Mino’s frequency response in the farfield, and an Earthworks QTC-40 mike for the nearfield and in-room responses. The 159lb loudspeaker was too bulky for me to move it outside for the testing. I therefore had to do the quasi-anechoic measurements in my listening room, where the proximity of room boundaries necessarily led to aggressive windowing of the time-domain data, which reduced the graphs’ resolution in the midrange.

    Vimberg specifies the Mino’s sensitivity as 89dB/W/m; my estimate was within experimental error, at 88.6dB(B)/2.83V/m. The Mino’s impedance is specified as 4 ohms, with a minimum value of 3.8 ohms at 100Hz. The solid trace

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