Bowers & Wilkins M1 loudspeakers

Specifications
Size & weight
Dimensions
Height: 248mm (9.8in)
Width: 114mm (4.5in)
Depth: 162mm (6.4in)
Mounted on table stand
Net weight
2.3kg (5lb)
Technical details
Drive units
1x ø25mm (1in) metal dome high-frequency
1x ø100mm (4in) woven glass fibre cone bass/midrange
Frequency range
-6 dB at 55Hz and 50kHz
Frequency response
64Hz - 23kHz ±3dB on reference axis
Harmonic distortion
2nd and 3rd harmonics (90dB, 1m) <1% 120Hz - 30kHz
Sensitivity
85dB spl (2.83V, 1m)
Nominal impedance
8? (minimum 4.0?)
Crossover frequency
4kHz
Recommended amplifier power
20W - 100W into 8ohm on unclipped programme