Technical features : Decoupled Carbon Dome tweeter Solid Body Tweeter-on-Top Continuum? cone bass / midrange Flowport? Max recommended cable impedance         0.1? Description         2-way vented-box system Drive units : 1x ø25mm (1 in) Decoupled Carbon Dome high-frequency 1x ø165mm (6.5 in) Continuum cone bass / midrange Frequency range           45Hz and 33kHz Frequency response         50Hz - 28kHz ±3dB Sensitivity         88dB spl (2.83Vrms, 1m) Harmonic distortion : 2nd and 3rd harmonics (90dB, 1m on axis) Nominal impedance          8? (minimum 3.7?) Recommended amplifier power        30W - 120W into 8? on unclipped programme Dimensions : Height: 345mm cabinet only 413mm including tweeter Width: 192mm cabinet only Depth: 297mm cabinet only 337mm including grille and terminals Net weight  9.58kg