684 S2 [Colour: Black]

RRP $1,899.00
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Switching to 5-inch bass/midrange drivers from the previous 6.5-inch cones, means the 684 S2 is now significantly slimmer than its predecessor, with simultaneously improved audio performance, thanks to Bowers & Wilkins innovation. The two Kevlar cone drivers benefit from smaller voice coils to increase sensitivity.

The 5-inch drivers now also feature Anti-Resonance Plug dustcaps, technology taken from our high-end PM1 speakers, that improve pistonic movement inside the voice coil. This helps to deliver amazingly distortion-free midrange performance, all in a smaller space.

As well as slimmer, improved driver performance, the 684 S2 also features a Decoupled Double Dome tweeter. Double dome technology, brought across from the CM10, increases tweeter rigidity for a more precise sound, while the tweeter sits in a gel-filled cavity, decoupled from the surrounding cabinet - which removes resonances and vibrations, for a more natural, spacious sound.


Woven Kevlar

Crossover Tuning

Nautilus Tapering Tube


Technical features

Decoupled Double Dome aluminium tweeter with Nautilus™ tube loading
Kevlar® brand fibre cone bass/midrange drivers


2-way vented-box system

Drive units

1x ø25mm (1 in) aluminium dome high-frequency
2x ø130mm (5 in) woven Kevlar® cone bass/

Frequency range

-6dB at 45Hz and 50kHz

Frequency response

72Hz - 22kHz ±3dB on reference axis


Within 2dB of reference response
Horizontal: over 60º arc
Vertical: over 10º arc


87dB spl (2.83V, 1m)

Harmonic distortion

2nd and 3rd harmonics (90dB, 1m)
<1% 140Hz - 22kHz
<0.5% 180Hz - 20kHz

Nominal impedance

8Ω (minimum 3.5Ω)

Crossover frequencies


Recommended amplifier power

25W - 150W into 8Ω on unclipped programme

Max. recommended cable impedance



Height: 920mm (36.2 in) cabinet only
Width: 160mm (6.3 in) cabinet only
Depth: 234mm (9.2 in)

Net weight

14.2kg (31.2 lb)


Black Ash


SKU spk-bw-684
Brand Bowers & Wilkins

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