Bowers & Wilkins 300 Series DM303 User Manual

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03/02. PU06572

300 Series

B&W Loudspeakers Ltd

T +44 (0) 1903 221800

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Copyright © B&W Loudspeakers Ltd.

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So much for so little…

It is time to raise your expectations. The Bowers & Wilkins 300 Series rewrites the rulebook on entry-levelspeaker definition. Until now, a gulf has existed between what most of us aspire

to in terms of audio, and what many of us can afford. The 300 Series dramatically reduces the gap between aspiration and acquisition. Quality can no longer be measured in direct proportion to price. On features where rival ranges would make sacrifices, the 300 Series refuses to compromise. But how?

The simple fact is that the acoustic engineers at Bowers & Wilkins who brought groundbreaking technology to the acclaimed Nautilus800 Series were not prepared to abandon all they had learned when they came to design more affordable ranges. They raised the stakes and you reap the benefit. Let’s take a closer look at the three models that make up the 300 Series.

Formerly available only in the more exclusive ranges,

the 300 Series incorporates for the first time in a speaker of its class the Nautilustube-loadedtweeter technology, producing the hallmark B&W clarity.

The LCR3 is magnetically shielded so that it can be placed right next to a TV without distorting the picture. The symmetrical driver configuration gives a choice of orientation for a truly versatile home

theatre speaker; horizontally as centre channel on top

of the TV, or in vertical position to left and right.

There’s the DM303 2-wayspeaker, which is equally at home withtwo-channelstereo or as a front left/right or surround speaker in a home theatre installation where magnetic shielding is not required. The LCR3 speaker is designed primarily for home theatre, and its magnetic shielding allows it to be positioned on or close to the TV without affecting

the picture. Finally, the ASW300 subwoofer delivers an added kick to the bass output of your 300 Series system. Featuring a 200mm paper/Kevlar® cone, the ASW300 will sit discreetly in your room, its internal 100w amplifier generating a noticeably more powerful sound environment, whether

from a stereo or home theatre system.

The range features a host of Nautilus-derivedtechnologies. Inside both the DM303 and LCR3, hidden away behind the tweeter, is a damped tapering tube. Thetube-loadedtweeter ensures far greater absorption of unwanted radiation from the rear of the dome, giving rise to a cleaner, more focused and natural high frequency sound.

The bass/midrange drivers of the DM303 and LCR3 use woven glass fibre cones, which function in a similar fashion to the Kevlar® cones used in B&W’s more exclusive ranges by cancelling out unwanted sound waves. Distortion and signal degradation are minimised by anaudiophile-qualitycrossover featuring air core inductors and plastic film capacitors.

All of these ingredients are skillfully blended to offer a level of performance unprecedented at this level, and

matched by a stunning design. The front baffle, moulded in inert mica-filledpolypropylene, has a subtly curved outline and is dimpled to echo the theme of the Flowport at the rear; itself elegantly combined with theeasy-accessterminal panel that accepts all common terminations, from spades to banana plugs to baredwire-ends.

Versatile and affordable, beautifully designed and easily expandable, the 300 Series is the perfect introduction to the world of Bowers & Wilkins.

With a powerful bass frequency output generated from inside a compact and stylish cabinet, the ASW300 subwoofer is the ideal partner for any 300 Series home cinema or stereo system.

All three models incorporate Flowport. The dimpled surface of the flared ends of the tube use golf ball

aerodynamics to smooth the airflow through the port, reducing turbulence noise to negligible levels.

DM303

LCR3

ASW300

Technical features

Nautilustweeter

 

 

Flowport

 

Description

2-wayvented-boxsystem

Drive units

1x ø160mm (6 in) woven fibreglass

 

cone bass/midrange

 

 

1x ø26mm (1 in) metal dome high-frequency

Frequency range

-6dBat 52Hz and 30kHz

Frequency response

72Hz – 20kHz ±3dB on reference axis

Dispersion

Within 2dB of response on reference axis

 

Horizontal: over 40° arc

 

Vertical: over 10° arc

Sensitivity

88dB spl (2.83V, 1m)

 

Harmonic distortion

2nd and 3rd harmonics (90dB, 1m)

 

<1% 90Hz – 20kHz

 

Nominal impedance

8Ω (minimum 4.3Ω )

 

Crossover frequency

4kHz

 

Recommended

25W – 100W into 8Ω

on

amplifier power

unclipped programme

 

Max. recommended

0.1Ω

 

cable impedance

 

 

Dimensions

Height:

331mm (13 in)

 

Width:

201mm (7.9 in)

 

Depth:

242mm (9.5 in)

Net weight

5 kg (11 lb)

 

Finishes

Cabinet:

Black Ash vinyl

 

 

Maple vinyl

 

Grille:

Black cloth

Nautilustweeter

Flowport

Magnetic shielding

2-wayvented-boxsystem

2x ø110mm (4.5 in) woven fibreglass cone bass/midrange

1x ø26mm (1in) metal dome high-frequency

-6dBat 60Hz and 30kHz

80Hz – 20kHz ±3dB on reference axis

Within 2dB of response on reference axis

Horizontal:

over 40º arc

Vertical:

over 10º arc

90dB spl (2.83V, 1m)

 

2nd and 3rd harmonics (90dB, 1m) <1% 70Hz – 20kHz

8Ω (minimum 3.3Ω )

4kHz

25W – 100W into 8Ω on unclipped programme

0.1Ω

Height:

152mm (6 in)

Width:

418mm (16.5 in)

Depth:

221mm (8.7 in)

5 kg (11 lb)

 

Cabinet:

Black Ash vinyl

 

Maple vinyl

Grille:

Black cloth

 

 

 

 

Technical features

Description

Drive unit

Frequency range Frequency response Amplifier

Low-passfilter

High-passfilter

Dimensions

Net weight

Cabinet finish

Grille

Bass Overload Suppression Circuitry

Flowport

Active vented-boxsubwoofer system

ø200mm (8 in) paper/Kevlar® cone

-6dBat 23Hz and 180Hz adjustable (EQ at A)

-3dB27Hz–150Hzadjustable (EQ at A)

Power output:

100W continuous

Input impedance:

22kΩ

Signal / noise:

>90dB

Functions:

Output level

 

Low-passfilter frequency

 

Low-passfilter bypass

 

Bass roll-offalignment

 

Auto sense on/standby

Inputs:

Line In (RCA Phono)

 

Speaker level (binding

 

posts)

Outputs:

Line Out (RCA Phono,

 

high-passed)

 

Link Out (RCA Phono,

 

parallel to Line In)

 

Speaker level out

 

(high-passed)

Active 2nd-order,variablecut-offfrequency

Line level: Active 3rd-orderat 80Hz Speaker level: Passive1st-orderat 80Hz (into 8Ω load)

Height: 405mm (16 in) including spike feet Width: 330mm (13 in)

Depth: 375mm (14.8 in) including grille and controls

15kg (33 lb)

Black Ash Vinyl

Maple Vinyl

Black cloth