| Technical features Nautilus™ tweeter |
| - Woven Kevlar® brand fibre cone bass/midrange |
| Description 2-way closed-box selectable dipole/monopole surround system |
| Drive units 1x ø25mm (1 in) alloy dome high-frequency |
| - 2x ø100mm (4 in) midrange/high-frequency |
| - 1x ø165mm (6.5 in) woven Kevlar® cone bass/midrange |
| Frequency range -6dB at 60Hz and 42kHz (monopole mode) |
| -6dB at 60Hz and 15kHz (dipole mode) |
| Frequency response 80Hz – 22kHz ±3dB on reference axis (monopole mode) |
| 80Hz – 10kHz ±3dB power averaged over front hemisphere (dipole mode) |
| Dispersion |
| Monopole mode: Within 2dB of reference response |
| Horizontal: over 40º arc |
| Vertical: over 10º arc |
| Dipole mode: Horizontal figure of eight |
| Effective null zone ±30º (250Hz – 15kHz) |
| Sensitivity 89dB spl (2.83V, 1m) |
| Harmonic distortion 2nd and 3rd harmonics (90dB, 1m) |
| <1%110Hz – 20kHz |
| Nominal impedance 8? (minimum 3.0?) |
| Crossover frequency 4kHz (monopole mode) |
| 250Hz (dipole mode) |
| Recommended amplifier power 25W – 120W into 8? on unclipped programme |
| Max. recommended cable impedance 0.1? |
| Dimensions : |
| - Height: 302mm |
| - Width: 383mm |
| - Depth: 165mm |
| Net weight 8.5kg |
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B&W DS7
