For hi-fi or home cinema in small to medium-sized rooms, you need a
loudspeaker that doesn’t take up floor area, but whose sound can still
command the space. You’ll find the 685, which can sit on a shelf, table,
stand or wall-mount, an inspired choice.
Its 165mm diameter
Kevlar® cone bass/midrange is based on a tried-and-trusted Bowers &
Wilkins design, but its new fixed centre bullet helps to smooth the
response in upper frequencies. Also, by setting the bass/midrange closer
to the tweeter than in equivalent earlier speakers, we have improved
the integration and vertical dispersion of sound from the two units. The
Nautilus™ tube-loaded, aluminium dome tweeter, featuring a new surround
material to improve spaciousness and imaging, adds needle-sharp top end
all the way to 50kHz and beyond.
Specifications
| Woven Kevlar |
Yes
|
| Crossover Tuning |
Yes
|
| Nautilus Tapering Tube |
Yes
|
| Flowport |
Yes
|
| Technical features |
Nautilus™ tube loaded aluminium dome tweeter
Kevlar® brand fibre cone bass/midrange
Flowport™ |
| Description |
2-way vented-box system |
| Drive units |
1x ø25mm (1 in) aluminium dome high-frequency
1x ø165mm (6.5 in) woven Kevlar® cone bass / midrange |
| Frequency range |
-6dB at 42Hz and 50kHz |
| Frequency response |
49Hz - 22kHz ±3dB on reference axis |
| Dispersion |
Within 2dB of reference response
Horizontal: over 60º arc
Vertical: over 10º arc |
| Sensitivity |
88dB spl (2.83V, 1m) |
| Harmonic distortion |
2nd and 3rd harmonics (90dB, 1m)
<1% 100Hz - 22kHz
<0.5% 150Hz - 20kHz |
| Nominal impedance |
8Ω (minimum 3.7Ω) |
| Crossover frequency |
4kHz |
| Crossover filters |
1st Order – tweeter |
| Recommended amplifier power |
25W - 100W into 8Ω on unclipped programme |
| Max. recommended cable impedance |
0.1Ω |
| Dimensions |
Height: 340mm (13.4 in)
Width: 198mm (7.8 in)
Depth: 331mm (12.3 in) |
| Net weight |
7.0kg (15.4 lb) |
| Finishes |
Black Ash
Red Cherry |