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Bowers & Wilkins DB4S Subwoofer

DB4S Subwoofer

Give your home cinema set-up the bass impact it deserves with DB4S – a powerful, classically styled single driver subwoofer that's a perfect match for the 700 Series.

Nimble and powerful

Solid, dramatic bass is delivered through the rigidity and lightness of the uniquely-shaped variable thickness Aerofoil™ cone.

Powerful amplification

Thanks to 1000w of digital amplification, DB4S delivers all the precision, control and authority you could ask for.

Digital preamplifier

DB4S uses a digital preamplifier featuring Dynamic EQ, for optimised audio performance across the available frequency range.

Control app

Adjust calibration and correction easily using DB4S dedicated smartphone app.

Technical specifications

1000W Class D Hypex amplifier
Aerofoil™ bass cone
Digital preamplifier with Dynamic EQ
App-based set-up and BT-LE control


Active closed-box subwoofer system

Drive units

1x ø250mm (10in) Aerofoil™ cone bass

Frequency range

-6dB at 8.5Hz and 500Hz

Frequency response

10Hz – 350Hz -3dB (centred on level at 100Hz)

Max power output


Rated power consumption at 1/8th of rated power


Standby power consumption



2 x RCA
2 x XLR

Input impedance

RCA: 10 kOhm
XLR: 20 kOhm

Signal to noise ratio

82 dB


Height 377mm (14.8 in) including feet
Width 360mm (14.1 in)
Depth 368mm (14.5 in)

Net weight

26kg (57.3 lb)

Cabinet finishes

Gloss Black
Satin White

Grille finishes


*Product description, details and specification subject to change. Please check the manufacturer's website for the most recent information. Errors and omissions excepted.