HTM6 centre channel speaker in the new 600 Series features our award-winning Continuum™ cone technology, which effortlessly creates a pure soundscape. In this latest iteration, we merged HTM62 S2 and HTM61 S2 into one powerful, punch-packing speaker that offers 603-matching levels of performance from a smaller, more preferred size. Technical features Decoupled Double Dome aluminium tweeter Continuum™ cone bass / midrange Flowport™ Description 2-way vented-box system Drive units 1x ø25mm (1 in) aluminium dome high-frequency 2x ø130mm (5 in) Continuum™ cone bass / midrange Frequency range -6dB at 42Hz and 33kHz Frequency response 72Hz - 28kHz ±3dB Sensitivity 87dB spl (2.83Vrms, 1m) Harmonic distortion 2nd and 3rd harmonics (90dB, 1m) <1% 100Hz - 22kHz <0.5% 200Hz - 22kHz Nominal impedance 8? (minimum 4.3?) Recommended amplifier power 30W - 120W into 8? on unclipped programme