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Bowers & Wilkins 603 S3 specifications and in-depth review

Bowers & Wilkins 603 S3

Manufacturer: Bowers & Wilkins

The Bowers & Wilkins 603 S3 is a floorstanding passive speaker designed for home audio use, built around a 3-way driver configuration housed in a bass reflex enclosure. Standing 985 mm tall and weighing 27.5 kg per unit, it occupies a substantial but focused footprint of 190 mm in width and 368 mm in depth, reflecting its intent as a dedicated full-range loudspeaker for dedicated listening spaces.

On the technical side, the 603 S3 uses a 6.5″ woofer, a 6″ midrange driver, and a 1″ tweeter to cover a stated frequency range of 29 Hz to 33,000 Hz. Its nominal impedance is 8 Ω, and it accepts a maximum peak input of 200 W, making it compatible with a wide range of amplifier pairings. The speaker carries a 5-year warranty and has an internal volume of approximately 68,871 cm³.

Pros
  • The 3-way driver configuration separates bass, midrange, and treble reproduction across dedicated drivers, allowing each to operate within a more focused range
  • A frequency response extending down to 29 Hz means the speaker can reproduce deep low-end content without a separate subwoofer
  • The upper frequency limit of 33,000 Hz extends well beyond the standard audible range, offering headroom at the top end
  • An 8 Ω nominal impedance is a widely compatible rating that works with most conventional stereo amplifiers
  • The 5-year warranty period provides extended coverage relative to many consumer electronics products
  • A bass reflex (ported) enclosure design is generally associated with improved low-frequency efficiency compared to sealed designs
Cons
  • At 27.5 kg per unit, each speaker is heavy enough to make positioning and repositioning physically demanding
  • The 985 mm height and 368 mm depth require a meaningful amount of dedicated floor space, limiting placement flexibility in smaller rooms
  • The speakers are not wall-mountable, restricting installation options to floor placement only
  • Being passive speakers, they require a separate amplifier or receiver to function, adding to the overall system complexity
Who is this for?

The 603 S3 is well suited to listeners who want a full-range floorstanding speaker capable of handling deep bass reproduction down to 29 Hz without the need for a dedicated subwoofer. Its 3-way driver layout and wide frequency range up to 33,000 Hz make it a strong fit for those building a dedicated stereo or home cinema listening room with adequate floor space. Users who already own or plan to invest in a separate stereo amplifier will find its 8 Ω nominal impedance and 200 W peak power handling compatible with a broad range of amplifier options.

Who is this NOT for?

At 27.5 kg per unit and standing nearly a metre tall, these speakers are impractical for anyone with limited room space or frequently changing listening setups, as repositioning them is physically demanding. Since they are passive speakers, they are not a good fit for users looking for a self-contained, plug-and-play audio solution without a separate amplification component. Their floor-only placement requirement also makes them unsuitable for those needing flexible or wall-mounted installation options.

General info:

Speaker type Passive
Driver layout 3-way
Form factor Floorstanding
Enclosure type Bass reflex (ported)
Weight 27.5 & 27.5 kg
are wall-mountable ✕
volume 68871.2 cm³
width 190 mm
height 985 mm
thickness 368 mm
warranty period 5 years

The Bowers & Wilkins 603 S3 is a passive floorstanding speaker built around a 3-way driver layout and a bass reflex (ported) enclosure. It stands 985 mm tall with a width of 190 mm and a depth of 368 mm, giving it an internal volume of 68,871.2 cm³. Each unit weighs 27.5 kg, and the speaker is not wall-mountable, making it suited exclusively for floor placement. The product is backed by a 5-year warranty.

Specifications:

Midrange driver size 6"
Tweeter size 1"
Main driver/woofer size 6.5"
lowest frequency 29 Hz
highest frequency 33000 Hz
Nominal impedence 8 Ω
Maximum power (peak) 200 W

The 603 S3 uses a 6.5″ woofer, a 6″ midrange driver, and a 1″ tweeter to span a frequency range of 29 Hz to 33,000 Hz. Its nominal impedance is 8 Ω, and it can handle a maximum peak input of 200 W, giving it a clear operating envelope for amplifier matching.

Features:

Final Verdict

The Bowers & Wilkins 603 S3 is a well-specified passive floorstanding speaker that brings together a 3-way driver layout, a frequency range spanning 29 Hz to 33,000 Hz, and a 200 W peak power handling capacity into a substantial floor-standing form. It is clearly designed for dedicated listening environments where space is available and a capable amplifier is already part of the setup. Its physical demands — both in terms of weight and footprint — and its passive nature mean it requires a considered, committed approach to system building. For those who can accommodate it properly, the 603 S3 represents a technically thorough loudspeaker with broad frequency coverage, a widely compatible 8 Ω impedance, and a five-year warranty that underlines its positioning as a long-term component in a home audio system.