| 684 |
|
Technical features | Nautilus™ | |
| Kevlar® brand fibre cone bass/midrange | |
| Kevlar® brand fibre cone bass driver | |
| Flowport™ | |
Description | ||
Drive units | 1x ø25mm (1 in) aluminium dome | |
| 1x ø165mm (6.5 in) woven Kevlar® cone bass/midrange | |
| 1x ø165mm (6.5 in) woven Kevlar® cone bass | |
Frequency range | ||
Frequency response | 44Hz - 22kHz ±3dB on reference axis | |
Dispersion | Within 2dB of reference response | |
| Horizontal: over 60° arc | |
| Vertical: | over 10° arc |
Sensitivity | 90dB spl (2.83V, 1m) | |
Harmonic distortion | 2nd and 3rd harmonics (90dB, 1m) | |
| <1% 90Hz - 22kHz | |
| <0.5% 120Hz - 20kHz | |
Nominal impedance | 8Ω (minimum 3.0Ω) | |
Crossover frequency | 150Hz, 4kHz | |
Recommended amplifier power | 25W - 150W into 8Ω on unclipped programme | |
Max. recommended cable impedance | 0.1Ω |
|
Dimensions | Height: | 910mm (35.8 in) (not including plinth or feet) |
| Width: | 198mm (7.8 in) |
| Depth: 300mm (11.8 in) (including grille and terminals) | |
Net weight | 18.2kg (40.1 lb) | |
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