607 speaker in the new 600 Series from Bowers & Wilkins transforms your home with pristine sound. The smaller of our bookshelf speakers, it fills your space with beautiful Bowers & Wilkins sound. Our Continuum™ cone technology, eight years in the making, creates a pure soundscape. *Stand/s not included Technical features Decoupled Double Dome aluminum tweeter Continuum™ cone bass / midrange Flowport™ Description 2-way vented-box system Drive units 1x ø25mm (1 in) aluminum dome high-frequency 1x ø130mm (5 in) Continuum™ cone bass / midrange Frequency range -6dB 40Hz and 33kHz Frequency response 52Hz - 28kHz ±3dB Sensitivity 84dB spl (2.83Vrms, 1m) Harmonic distortion 2nd and 3rd harmonics (90dB, 1m) <1% 110Hz - 22kHz <0.5% 180Hz - 20kHz Nominal impedance 8? (minimum 4.0?) Recommended amplifier power 30W - 100W into 8? on unclipped program