Product Specifications Max Power Rating (Watts): 120 RMS Power Rating (Watts): 35 Compliance (Cms): 545.5 Cone Area (Sd): 5.2 D.C. Coil Resistance (Re): 3.6 Electrical Q (Qes): 1.196 Force Factor (Bl): 2.964 Free Air Resonance (Fs): 100.1 Frequency Response: 75Hz - 20kHz Impedance (Nominal): 4 Mechanical Excursion (mm): 7 Mechanical Q (Qms): 2.397 Sensitivity (dB) (1W/1M): 87 Total Loudspeaker Q (Qts): 0.798 Magnet Structure (Oz): 5.4