The rationale is the development of the new SR-007MK2 Earspeaker was to provide deep powerful sound previously unobtainable in Earspeakers. STAX engineers developed a unique new electrode structure. Visible through the outer case, gold plated on the outer edge this new electrode has no holes unlike conventional STAX Earspeakers and thus provides an increases diaphragm vibration area allowing for rich and powerful sound yet retaining all the delicacy STAX is famous for.
Type:Push-Pull electrostatic circular sound element, Open-Air type enclosure
Frequency Response:6 - 41,000Hz
Capacitance:94pF (including cable)
Impedance:170k Ω (10kHz)
Sensitivity:100dB / 100V r.m.s. 1 kHz
Bias Voltage:580V DC
Left & Right Channel Identification:'L' and 'R' indicated on the cable entrance point, solid line (left) and dotted line (right) on the cable