For logistical reasons, I measured a different sample of the Volti Audio Razz (serial number V1, 007) to those auditioned by Tom Gibbs. (There wasn’t a grille supplied with this sample.) I measured the loudspeaker’s farfield behavior with DRA Labs’ MLSSA system and a calibrated DPA 4006 microphone. I used an Earthworks QTC-40 mike for the speaker’s nearfield responses. I repeated some of the testing with Dayton Audio’s OmniMic V2 and DATS V2 systems.

Volti specifies the Razz’s sensitivity as “97dB.” My estimate was 93dB(B)/2.83V/m—while this is lower than the specification, it is still much higher than average. Although the Razz’s nominal impedance is specified as 6 ohms, the magnitude (fig.1, solid trace) rarely drops below 8 ohms. The average impedance is around 12 ohms, though there is a minimum value of 4.1