B&W 707 S3

2-way vented-box system
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Features
Decoupled Carbon Dome tweeter
Continuum™ cone bass / midrange 
 
Drive units - 1x ø25mm (1 in) Decoupled Carbon Dome high-frequency
1x ø130mm (5 in) Continuum cone bass / midrange
Frequency range - -6dB at 45Hz and 33kHz
Frequency response - 50Hz - 28kHz ±3dB
Sensitivity - 84dB spl (2.83Vrms, 1m)
Nominal impedance - 8Ω (minimum 4.0Ω)
Recommended amplifier power - 30W - 100W into 8Ω on unclipped programme
Dimensions = Height: 280mm (11 in) - Width : 165mm (6.5 in) - Depth: 260mm 
Net weight - 6.0kg (13.2 lb)