Starting with the Studio 20's impedance magnitude and phase (fig.1)—all the measurements were performed by John Atkinson, using DRA Labs' MLSSA system—we can see the double impedance peak in the bass, indicative of a reflex port tuning at 44Hz with the woofer tuning at about 70Hz. The minimum impedance is 5.5 ohms at 235Hz, and stays above 8 ohms beyond 800Hz. This moderate to high impedance, coupled with a benign phase angle (dotted line in fig.1), suggest the Studio 20s will present an easy load to an amplifier.
Fig.1 Monitor Audio Studio 20…