Bowers & Wilkins 603 S3 Floorstanding Speakers

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Black

Oak

Red Cherry

White

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A three-way floor-standing speaker from the Bowers & Wilkins 600 Series S3 range. Each speaker has a 25mm Titanium Dome tweeter, a 150mm Continuum cone FST midrange and two 165mm paper cone bass drivers in a vented cabinet. Bowers & Wilkins calls it the largest loudspeaker in the 600 Series.

Bowers & Wilkins says the 603 S3 is ideal for larger rooms and home theatres. It adds a new Titanium Dome tweeter, an acoustically transparent tweeter grille mesh and upgraded speaker terminals.

Finish options on this listing: Black, Oak, Red Cherry and White.

Design

3-way vented box (Flowport)

Drivers

1" Titanium dome, 6" Continuum midrange, 2 x 6.5" paper bass

Sensitivity

90dB (2.83Vrms, 1m)

Recommended amp power

30W - 200W into 8Ω

Frequency range (-6dB)

29Hz - 33kHz

Size (H x W x D)

985 x 190 x 340 mm

Why you will love it

The largest 600 Series speaker

Bowers & Wilkins describes the 603 S3 as the largest loudspeaker in the 600 Series, ideal for larger rooms and home theatres. It says room-filling scale and authority come from the two bass drivers, and that improved terminals and enhanced drive unit positioning round out the design.

Two Bowers & Wilkins 603 S3 floor-standing speakers either side of a TV in a living room

Bowers & Wilkins 600 Series S3 tweeter assembly

Titanium Dome tweeter

The 603 S3 introduces Bowers & Wilkins' new Titanium Dome tweeter. The company says it combines resolution and insight with smooth, refined high-frequency reproduction.

Bowers & Wilkins also says the new tweeter grille mesh is even more acoustically transparent. It was first developed for its Signature models.

Continuum cone FST midrange

Bowers & Wilkins says the composite Continuum cone avoids the abrupt transitions in behaviour that can impair a conventional drive unit. It says the result is a more open, neutral performance that delivers voices and instruments with precision and transparency.

Bowers & Wilkins 603 S3 Continuum cone midrange driver

Rear of a Bowers & Wilkins 603 S3 showing the port and speaker terminals

Two bass drivers and upgraded terminals

Two 165mm (6.5 in) paper cone bass drivers work with a vented cabinet and Bowers & Wilkins' Flowport. The speaker terminals are derived from those introduced on the 700 Series, with an improved layout and a cleaner signal path between amplifier and speaker, the company says.

Is it right for you?

A great fit if you…

Want a floor-standing speaker with a Titanium Dome tweeter and a Continuum cone midrange
Have an amplifier or receiver that delivers 30W - 200W into 8Ω
Have room for a cabinet 985mm high, 1,020mm with the plinth
Want stereo or front speakers for a home theatre

Worth knowing

It is a passive speaker, so it needs an amplifier or AV receiver
Nominal impedance is 8Ω with a minimum of 3.0Ω
The listing offers Black, Oak, Red Cherry and White finishes
Grilles are Black on the Black finish and Grey on White and Oak, per Bowers & Wilkins

Build your system

The 603 S3 is a passive speaker. These items are on our site.

Amplification: Drive it with stereo amplifiers or AV receivers
Centre channel: For home theatre, add a Bowers & Wilkins HTM6 S3 centre speaker
Bass: Add a Bowers & Wilkins DB1D subwoofer or another of our subwoofers
Other speakers: Compare the smaller Bowers & Wilkins 606 S3 bookshelf speakers and 607 S3 speakers, or browse floor-standing speakers

Specifications

Drivers and design

Design	3-way vented-box system
Drive units	1 x ø25mm (1 in) Titanium Dome high-frequency; 1 x ø150mm (6 in) Continuum cone FST midrange; 2 x ø165mm (6.5 in) paper bass cone
Technical features	Titanium Dome tweeter; Continuum cone FST midrange; paper bass cones; Flowport

Performance

Frequency range (-6dB)	29Hz - 33kHz
Frequency response (±3dB)	46Hz - 28kHz
Sensitivity	90dB (on axis, 2.83Vrms at 1m)
Nominal impedance	8Ω (minimum 3.0Ω)
Recommended amplifier power	30W - 200W into 8Ω on unclipped programme
Max recommended cable impedance	0.1Ω

Size and weight

Height	985mm cabinet only; 1,020mm including plinth
Width	190mm cabinet only; 260mm including plinth
Depth	340mm cabinet only; 368mm including grille and terminals; 402mm including plinth
Net weight	27.5kg

Finish

Finish options on this listing	Black, Oak, Red Cherry, White
Grille	Black (Black finish); Grey (White and Oak finishes)

Specifications from Bowers & Wilkins' Australian 603 S3 product page, checked November 2026.

Questions people ask

What drivers does the 603 S3 have?

A 25mm (1 in) Titanium Dome tweeter, a 150mm (6 in) Continuum cone FST midrange and two 165mm (6.5 in) paper cone bass drivers, per Bowers & Wilkins.

What amplifier power does Bowers & Wilkins recommend?

30W - 200W into 8Ω on unclipped programme.

Does it need an amplifier?

Yes. The 603 S3 is a passive speaker, so connect it to a stereo amplifier or AV receiver.

Which finishes are listed?

This listing offers Black, Oak, Red Cherry and White.

Can I use it for home theatre?

Bowers & Wilkins says the 603 S3 is ideal for larger rooms and home theatres. It is a passive speaker, so pair it with an AV receiver.