The appointment of the low-mid range diameter in / mm 15/380 Power RMS (W) 300 the resistance (ohms) 8 the resonance frequency Fs (Hz) 55.4 Sensitivity 1 W / m (dB) 97 Qts total Q-factor 0.3 equivalent volume Vas (l) 66.4 the maximum displacement Xmax (mm) 4 Frequency range (Hz) 60-2500 coil diameter (in) 3 ferrite magnet material Weight (kg) 8.2