Wharfedale Pro Opus2 User manual

Loudspeakers

INTRODUCTION

The Opus2loudspeaker system is

a premium quality, large format

loudspeakerdesignedfor exceptional

accuracy in the reproduction of

recorded music and film.

The scale of presentation and

dynamic range is beyond that

possible from conventional high-

fidelity loudspeakers, primarily

because of the volume of air capable

of being displaced from the drive

units; their speed of response and

agility under pressure.

Numerous new technologies have

been applied throughout the range

to ensure that Opus2is capable of

creating a lifelike listening experience

akin to that of a live concert hall.

New Carbon-Fibre bass drivers, our

unique tri-laminate cone, three-inch

dome mid-range and a lightweight

‘copper-coated’ aluminium tweeter

voice-coil for extended and precise

high-frequency response, all

contribute towards one of the finest

loudspeakers available today.

Build and finish is nothing short of

exceptional - something you would

expect from a product of this quality -

yet every detail has been addressed.

The Opus2series fit effortlessly into

the living environment with the

choice of piano or satin finishes, and

a range of real wood veneers - not

reconstituted woods used on lesser

loudspeakers. Gold-plated terminals,

cast alloy trim and accessories simply

guild the real construction which

utilises variable-density multi-layer

laminate MDF cabinets, sealed and

isolated mid-range compartment,

high-purity oxygen-free copper

cables and a simple yet perfectly

executed crossover.

DESIGN TECHNOLOGY

The Wharfedale design principle

has, since our foundation in 1932,

been one of simple execution and

vertical component synergy. This

principle is manifest within Opus2.

Every component, sub-assembly,

even the crossover elements are

manufactured entirely in-house to

a standard commensurate with

the product and with regard to

every other component within the

loudspeaker.

Through this vertical integration we

are able to ensure the cabinets fit

the drive units, that the operating

spectrum of the drive units work

with each other and that the whole

is much greater than the sum of the

parts - perfect synergy.

Thisall-embracingapproach todesign

pays dividends in performance.

Because the crossover can be

relatively simple, phase linearity

is preserved, meaning the drive

units move in unison - a seamless

transition from one to the other

without disconnect or interference.

Because each drive unit is operating

so comfortably within its own

specification, the presentation is

relaxed and confident; powerful

and fulfilling.

Opus2loudspeakers have a further

feature - usually found only in the

highestqualityprofessionalrecording

studios - a dome mid-range driver

capable of reproducing the entire

range of human vocal reproduction

- with a dispersion characteristic

which mimics the voice.

Through this synergy, Opus2

achieves one of the most natural

presentations possible from a

moving-coil loudspeaker.

The most common criticism levelled at

hi-fi companies today is that systems

are designed either for home cinema

use, or to reproduce stereo music

accurately. It is seemingly difficult

to find a system that combines

the best of both worlds without

compromise to each other. Opus2,

however, has been engineered as

a complete range with dedicated

models available for use as centre

channels and surround speakers.

Within film soundtracks, around

70% of the audio is usually directed

through the centre speaker. It is

essential therefore, that this speaker

is not only of the very highest quality,

but that it integrates seamlessly

with the front left and front right

speakers, presenting a cohesive front

soundstage.

The Opus2centre channel speaker

utilises the same dome mid-range

and tweeter arrangement as in all the

floorstand and stand-mount models.

Aligned vertically, their dispersion

is uniform on the horizontal plane

with none of the ‘lobing’ that lesser

centre channels can be prone to.

Tonally matched and perfectly

balanced to present vocals in a

breath-takingly natural fashion, the

Opus2centre is the result of many

years work in the field of home

cinema.

The tri-surround speakers within

the Opus2range take the principle

of tonal matching further still,

perfectly integrated with the rest

of the series, yet with a full 180

degree dispersion aimed at fully

immersing the listener within a

complete soundfield.

The Opus2series also includes

the new ‘AVC’ models. These

are specifically engineered to

be wall mounted for the least

intrusive installation, yet with the

same outstanding neutrality and

cleanliness as the larger models.

APPLICATIONS

A new studio monitor quality large

dome mid-range drive unit is used

over the crucial midband frequencies,

700 Hz – 4 kHz. A key feature of this

driver is exceptionally low distortion

over its entire working range –

typically less than 1% at a Sound

Pressure Level of 100 db at 1 metre.

The driver is mounted in a custom

matched fascia plate which provides

partial horn loading,

giving a broad angle

of dispersion at its

upper crossover

point. The fascia

plate is die

cast aluminium,

designed to place

the units as close as

possible for optimum

integration and to create a point

source effect.

The dome is driven by a large 75 mm

voice coil based on a hard aluminium

former to provide maximum rigidity

and to maintain a cool coil operating

temperature by maximising thermal

radiation. The diaphragm supporting

ring is die cast aluminium to maintain

perfect concentricity of the moving

parts during assembly. The dome

is pressure equalised by a closely

coupled underside perforated dome

baffle and a rear chamber within an

extended die cast aluminium finned

rear cover which serves as a heat sink

and breaks up internal resonances. A

powerful high flux shielded magnet

provides ample reserves of motor

force to the dome.

The highest

frequencies are

handled by a

soft dome driver.

Extensive research

at Wharfedale has

established that properly

engineered soft domes are

a better choice than metallic

based domes, which add their

own typical character to the treble

response. The new Opus² tweeter

has been re-engineered with a fine

gauge aluminium coil to reduce the

moving mass and extend response to

beyond 45 kHz -far above audible

frequencies.

Careful attention to detail has resulted

in wide dispersion with very low

distortion again typically below 1%

at an SPL of 100 db at 1 metre. The

unit uses a fully shielded high flux

neodymium magnet, and produces a

typical SPL of 93 dB at 1 metre at an

input of one Watt. Die cast aluminium

structural parts are used throughout

and a rear cover isolates the tweeter

dome from the pressure of other

speaker components.

INTEGRATED DRIVER DESIGN

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