2 1/2 Way Floorstanding Speaker 684

Brand

Bowers & Wilkins

Type

2 ½ way vented box system

Technical Features

Nautilus^TM tube loaded aluminium dome tweeter

Kevlar® brand fibre cone/bass midrange

Kevlar® brand fibre cone/bass driver Flowport^TM

Drive Units

1 x 25mm (1 in) aluminium dome high frequency

1 x 165mm (6.5 in) woven Kevlar® cone bass/mid

1 x 165mm (6.5 in) woven Kevlar® cone bass

Frequency Range

6dB at 34kHz and 50kHz

Frequency Response

44Hz - 22Hz ± 3dB on reference axis

Dispersion

Within 2dB of reference response

Horizontal: over 60º arc

Vertical: over 10º arc

Sensitivity

90dB spl (2.83V, 1m)

Harmonic Distortion

2^nd and 3^rd Harmonics (90dB, 1m)

<1% 90Hz - 22Hz

<0.5% 120Hz - 20Hz

Nominal Impedance

8Ω (minimum 3.0Ω)

Crossover Frequencies

150Hz, 4Hz

Crossover Filters

1^st Order - tweeter

1^st Order - bass/midrange

1^st Order - bass

Recommended Amplifier Power

25w - 150w into 8Ω on unclipped programme

Max. recommended cable impedance

0.1Ω

Finishes

Black Ash Vinyl

Light Oak Vinyl

Red Cherry Vinyl

Wengé Vinyl