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.
Sensitivity 87dB spl (2.83V, 1m)
Harmonic distortion 2nd and 3rd harmonics (90dB, 1m)
<1% 140Hz – 22kHz
<0.5% 180Hz – 20kHz
Nominal impedance 8Ω (minimum 4.0Ω)
Crossover frequencies 4kHz
Recommended amplifier power 25W – 150W into 8Ω on unclipped programme
Max. recommended cable impedance 0.1Ω
Dimensions 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)
Finishes Black Ash