Max Power Rating (Watts): 120 RMS Power Rating (Watts): 35 Compliance (Cms): 435.01 Cone Area (Sd): 7.9 D.C. Coil Resistance (Re): 3.6 Electrical Q (Qes): 1.766 Force Factor (Bl): 2.686 Free Air Resonance (Fs): 103.4 Frequency Response: 90Hz - 20kHz Impedance (Nominal): 4 Mechanical Excursion (mm): 7 Mechanical Q (Qms): 2.625 Sensitivity (dB) (1W/1M): 86 Total Loudspeaker Q (Qts): 1.056 Magnet Structure (Oz): 5.4