Colunas Bowers and Wilkins DM 604 S3 , colunas bastante potentes e com um som bastante agradável ao ouvido.

Specifications:
Type: 3 way, 4 driver loudspeaker system
Frequency Response: 34Hz to 30kHz
Recommended Amplifier: 25 to 200W
Crossover Frequency: 450, 3000Hz
Impedance: 8Ω
Sensitivity: 90dB
Bass: 2 x 180mm cobex
Midrange: 1 x 180mm kevlar
Tweeter: 1 x 26mm metal dome
Enclosure: bass reflex
Grille: black cloth
Dimensions: 996 x 236 x 411mm
Weight: 28.2kg

The imposing DM604 S3 is the only full 3-way system in
the range. The dedicated Kevlar® cone midrange driver
is housed in its own isolated chamber within the cabinet
and delivers all the nuances of the detail in the recording
without the encumbrance of having to produce any bass.
Twin 180mm (7 in) aluminium cone bass drivers combine
with Flowport to deliver the deepest bass frequencies
with ease. Like all the vented-box systems in the range,
foam plugs are supplied to block the ports should the
acoustic of the listening room impose too much bass
reinforcement. Suited to larger rooms, the DM604 S3
is capable of reproducing everything from the delicate
sounds of a solo performance to the complexities of a
large ensemble.