The Decoupled Double Dome tweeter found in the 685 S2, and the rest of the new 600 Series, is technology taken straight from our award-winning CM10 speaker. A dual-layer design combines a thin aluminium dome for lightness and a thicker aluminium ring for rigidity – the result is absolutely stunning, with far greater clarity in the audible spectrum.
The tweeter is also decoupled from the main cabinet, kept physically separate in its own cavity with a ring of gel cushioning it from vibrations. This improves imaging and dispersion for a more natural, spacious treble.
As well as a decoupled, double dome aluminium tweeter, the two-way 685 S2 features a full-range 6.5-inch driver constructed from woven Kevlar and using Anti-Resonance Plug dustcaps, as seen in high-end Bowers & Wilkins speakers. The result is stunning audio quality from a highly versatile smaller speaker.
Bowers and Wilkins have a huge range of their own technology in all of their speakers, we have compiled this on a separate page with links to all of the technical information, videos and data sheets, please click the links below to find out more.
|Nautilus Tapering Tube|
|Technical features||Decoupled Double Dome aluminium tweeter with Nautilus™ tube loading
Kevlar® brand fibre cone bass/midrange
|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 /
|Frequency range||-6dB at 45Hz and 50kHz|
|Frequency response||52Hz - 22kHz ±3dB on reference axis|
|Dispersion||Within 2dB of reference response
Horizontal: over 60º arc
Vertical: over 10º arc
|Sensitivity||87dB spl (2.83V, 1m)|
|Harmonic distortion||2nd and 3rd harmonics (90dB, 1m)
<1% 95Hz - 22kHz
<0.5% 140Hz - 20kHz
|Nominal impedance||8Ω (minimum 4.0Ω)|
|Recommended amplifier power||25W - 100W into 8Ω on unclipped programme|
|Max. recommended cable impedance||0.1Ω|
|Dimensions||Height: 345mm (13.5 in)
Width: 190mm (7.5 in)
Depth: 324mm (12.8 in)
|Net weight||6.8kg (14.9 lb)|