Wharfedale Portable Speaker Opus2 User Manual

L o u d s p e a k e r s

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INTRODUCTION

The Opus²loudspeaker system is voice-coil for extended and precise

a premium quality, large format high-frequency response, all

loudspeakerdesignedforexceptional contribute towards one of the finest

accuracy in the reproduction of loudspeakers available today.

recorded music and film.

Build and finish is nothing short of

The scale of presentation and exceptional - something you would

dynamic range is beyond that expect from a product of this quality -

possible from conventional high- yet every detail has been addressed.

fidelity loudspeakers, primarily The Opus²series fit effortlessly into

because of the volume of air capable the living environment with the

of being displaced from the drive choice of piano or satin finishes, and

units; their speed of response and a range of real wood veneers - not

agility under pressure.

reconstituted woods used on lesser

Numerous new technologies have loudspeakers. Gold-plated terminals,

been applied throughout the range cast alloy trim and accessories simply

to ensure that Opus²is capable of guild the real construction which

creatingalifelikelisteningexperience utilises variable-density multi-layer

akin to that of a live concert hall.

laminate MDF cabinets, sealed and

New Carbon-Fibre bass drivers, our isolated mid-range compartment,

unique tri-laminate cone, three-inch high-purity oxygen-free copper

dome mid-range and a lightweight cables and a simple yet perfectly

‘copper-coated’ aluminium tweeter executed crossover.

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DESIGN TECHNOLOGY

The Wharfedale design principle relatively simple, phase linearity

has, since our foundation in 1932, is preserved, meaning the drive

been one of simple execution and units move in unison - a seamless

vertical component synergy. This transition from one to the other

principle is manifest within Opus². without disconnect or interference.

Every component, sub-assembly, Because each drive unit is operating

even the crossover elements are so comfortably within its own

manufactured entirely in-house to specification, the presentation is

standard commensurate with relaxed and confident; powerful

the product and with regard to and fulfilling.

every other component within the Opus²loudspeakers have a further

loudspeaker.

feature - usually found only in the

Through this vertical integration we highestqualityprofessionalrecording

are able to ensure the cabinets fit studios - a dome mid-range driver

the drive units, that the operating capable of reproducing the entire

spectrum of the drive units work range of human vocal reproduction

with each other and that the whole - with a dispersion characteristic

is much greater than the sum of the which mimics the voice.

parts - perfect synergy.

Thisall-embracingapproachtodesign achieves one of the most natural

Through this synergy, Opus²

pays dividends in performance. presentations possible from

Because the crossover can be moving-coil loudspeaker.

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APPLICATIONS

The most common criticism levelled at Aligned vertically, their dispersion

hi-fi companies today is that systems is uniform on the horizontal plane

are designed either for home cinema with none of the ‘lobing’ that lesser

use, or to reproduce stereo music centre channels can be prone to.

accurately. It is seemingly difficult Tonally matched and perfectly

to find a system that combines balanced to present vocals in a

the best of both worlds without breath-takingly natural fashion, the

compromise to each other. Opus², Opus²centre is the result of many

however, has been engineered as years work in the field of home

a complete range with dedicated cinema.

models available for use as centre The tri-surround speakers within

channels and surround speakers.

the Opus²range take the principle

Within film soundtracks, around of tonal matching further still,

70% of the audio is usually directed perfectly integrated with the rest

through the centre speaker. It is of the series, yet with a full 180

essential therefore, that this speaker degree dispersion aimed at fully

is not only of the very highest quality, immersing the listener within a

but that it integrates seamlessly complete soundfield.

with the front left and front right The Opus²series also includes

speakers, presenting a cohesive front the new ‘AVC’ models. These

soundstage.

are specifically engineered to

The Opus²centre channel speaker be wall mounted for the least

utilises the same dome mid-range intrusive installation, yet with the

and tweeter arrangement as in all the same outstanding neutrality and

floorstand and stand-mount models. cleanliness as the larger models.

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INTEGRATED DRIVER DESIGN

A new studio monitor quality large rear cover which serves as a heat sink

dome mid-range drive unit is used and breaks up internal resonances. A

over the crucial midband frequencies, powerful high flux shielded magnet

700 Hz – 4 kHz. A key feature of this provides ample reserves of motor

driver is exceptionally low distortion force to the dome.

over its entire working range –

typically less than 1% at a Sound The

Pressure Level of 100 db at 1 metre. frequencies

The driver is mounted in a custom handled by

highest

are

matched fascia plate which provides soft dome driver.

partial horn loading, Extensive research

giving a broad angle at Wharfedale has

of dispersion at its established that properly

upper crossover engineered soft domes are

point. The fascia a better choice than metallic

plate

die based domes, which add their

cast aluminium, own typical character to the treble

designed to place response. The new Opus² tweeter

the units as close as has been re-engineered with a fine

possible for optimum gauge aluminium coil to reduce the

integration and to create a point moving mass and extend response to

source effect.

beyond 45 kHz -far above audible

frequencies.

The dome is driven by a large 75 mm

voice coil based on a hard aluminium Careful attention to detail has resulted

former to provide maximum rigidity in wide dispersion with very low

and to maintain a cool coil operating distortion again typically below 1%

temperature by maximising thermal at an SPL of 100 db at 1 metre. The

radiation. The diaphragm supporting unit uses a fully shielded high flux

ring is die cast aluminium to maintain neodymium magnet, and produces a

perfect concentricity of the moving typical SPL of 93 dB at 1 metre at an

parts during assembly. The dome input of one Watt. Die cast aluminium

is pressure equalised by a closely structural parts are used throughout

coupled underside perforated dome and a rear cover isolates the tweeter

baffle and a rear chamber within an dome from the pressure of other

extended die cast aluminium finned speaker components.

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PERFORMANCE BASS

Opus ² bass units are of two main Voice coils in high performance

types. The smallest cabinets use loudspeakers have to withstand

a triple laminated cone of glass extremes of mechanical stress and

/carbon/ glass. Smaller cabinets heat. The lateral strength of Opus²

intensify reflections that can pass voice coils is very high. We use a

back through the cone. The special combination of half hard aluminium

“tri-lam” construction minimises these and resin bonded glass fibre. The

reflections because of its extreme ability of our voice coils to resist

rigidity. The larger cabinets use deformation under extreme stress

larger drivers and here low cone contributes towards some of the

mass is of crucial importance in lowest distortion figures ever seen in

maintaining impulse response and conventional drivers.

performance.

All Opus² large format speakers

Our latest cone designs for the are fully magnetically shielded

large format models utilise our own with additional bucking magnets

bi-carbon weave and laminating

processes. Carbon fibre has

and steel covers on the bass

driver magnets. You can

operate an Opus²

speaker close to the

most magnetically

sensitiveTVmonitor

with no fears

immense

longitudinal

strength and is used in

many structures where

high strength and

light weight are

key

requisites.

carbon

over screen

The

fibre

interference.

bundles

some

are woven and

impregnated with

special bonding

loudspeakers,

motional noise

can be a problem

resins

that

are

especially

high

subsequently pressure

output bass systems. The Opus²s

formed and heat cured. The resulting high pressure injection die- cast

material is exceptionally rigid and aluminium chassis used on our bass

exhibits very low levels of internal drivers feature an ‘open design’

resonance. As

consequence, where narrow legs maximise the

energy losses in the cone transfer open areas of the frame to all but

mechanism are very low. Because eliminate rear reflections. Trapped

our bass drivers are just that, or compressed air within the driver

their cones maintain true pistonic unit can easily move through vents

action over their entire designed in the voice coil, through the magnet

low frequency range. The cone is structure, through the spider, and

terminated with a large half roll of from the underside of the central cap

synthetic butyl rubber with superb both through holes in the cone and

damping qualities.

the magnet central core.

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A PERFECT BAL ANCE

All models feature printed circuit electrolytic capacitors specially

boards with large copper tracks selected for their outstanding audio

to maximize signal transfer and properties. These capacitors are

component

layouts

designed marked with the ‘Wharfedale super

to eliminate inference from any audio capacitor’ logo. The internal

residual stray magnetic fields. The cables used are specially made and

printed circuit boards are mounted assembled in our factory: 4 multiple

on vibration free mountings. Most strand oxygen-free copper wires are

models have two printed circuit plaited into a single cable for all

boards to separate the bass inductors internal loudspeaker connections.

from those coupling the midrange

and tweeter units.

The bass inductor has a large

magnetic field when operating

which would otherwise modulate

the other inductors. All inductors

feature perfect layer winding and

large gauges of wire are used to

keep insertion loss to a minimum.

Capacitors in crossover networks

pose special problems. The Opus²

range features high grade low-loss,

low-ecr, polypropylene or reversible

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MEASURED PERFORMANCE

It is often said that a loudspeaker in demonstration. Most notably

is the weakest point in any audio though from the engineer’s point of

system and this is largely true. It view, it hides many kinds of small

is the point at which the electrical frequency response abhorrations.

signal is converted into compressions Aside from not reproducing the

and rarefactions within the air that original recording faithfully though,

our ears recognise as sound.

this can be inclined to cause

longer-term listening fatigue.

The mechanics of this transfer of cosy respnose is nowhere near as

energy and how accurately this accurate, revealing, transparent or,

occurs is a constant battle for the in the long term, enjoyable as a well-

loudspeaker engineer and one which balanced flat response.

we, at Wharfedale, have lead the

field for over seventy-five years.

Even small abhorations in the

frequency response have a profound

The measured performance of our effect on the overall loudspeaker

Opus²system is a testament to this balance. Peaks in the response

success. We have engineered a spectrum can mask surrounding

loudspeaker system that is ruler-flat frequencies leading to a loss of

across a wide band-width and yet transparency and a ‘blurring’ of the

remains a relatively easy load for soundstage. Because we engineer

any good amplifier system.

our own drive units and cabinets in

complete synergy to the rest of the

Many loudspeaker engineers aim for design process, we control every

a sound that could be described as aspect of our drivers’ performance

‘cosy’. It is easy to listen to for short and can get much closer to an ideal

periods and immediately impressive performance.

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MEASUREMENT AND ANALYSIS:

Frequency response plots may tell By analysing the ‘Polar Response’

you a lot about what you might hear across a wide range of frequencies,

from a loudspeaker when you listen to it’s possible to design a loudspeaker

a speaker ‘on-axis’ or straight in front which not only has a text-book ‘on-

of the speaker, but do nothing to tell axis’ response, but one which can

you how a loudspeaker will integrate integrate superbly into the listening

into a real room environment.

environment.Whilstthisisimportantto

the performance of a stereo speaker

Anomalies in the off-axis response system, in multi-channel or home-

can cause reflections from side walls cinema systems it is nothing short of

or room objects to create unpleasant essential - yet so many manufacturers

interference effects

overlook this key design stage.

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ENGINEERING PERFORMANCE

The overall measure of success of arbiter though, the human ear, is

a high-end loudspeaker system is the most important test of all - and

to design a loudspeaker that is all Opus2 loudspeaker models have

both accurate and natural, very low undergone a two-year long process

in distortion, which covers a wide of listening and tweaking before

band-width of frequencies and can final approval to refine and further

provide immense pleasure to the refine their balance to the point

listener over long periods of time.

where the loudspeaker acoustically

‘vanishes’ – leaving just the music.

Many of these criteria can be

designed into a system through careful Only when a loudspeaker truly

measurement and analysis, but the final represents not only the tonal

factor - the ability to provide pleasure integrity and clarity of the original

to the listener is a black art – a skill performance, but also is so finely

developed by the master acoustician balanced that it communicates the

over a lifetime of experience.

genuine passion and raw emotion

of the live performance, can we be

Opus²loudspeakers meet all the pre- satisfied that all the design objectives

requisites of performance – in fact have been fulfilled.

in measured tests, they outperform

all their peers and many which All Opus2 loudspeakers meet these

cost considerably more. The final most stringent objectives.

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SPECIFICATIONS

Opus² - M1

Transducer complement Three

Bass Driver Cone 170mm

Opus² - M2

Three

Opus² - 1

Three

Opus² - 2

Opus² - 3

Four

200mm

200mm x 2

3” 75mm textile

1” 25mm textile

250mm x 2

3” 75mm textile

1” 25mm textile

Soft Dome Mid-range 3” 75mm textile

Soft Dome Tweeter 1” 25mm textile

Nominal impedance 6 Ohms

Impedance variation ohms 4.2 - 28

Frequency Response +/- 3dB 42Hz - 43kHz

LF limit -10 dB 38Hz

3” 75mm textile

1” 25mm textile

6 Ohms

5.0 - 25

40Hz - 43kHz

36Hz

3” 75mm textile

1” 25mm textile

6 Ohms

5.0 - 33

37Hz - 43kHz

28Hz

Ohms

4.5 - 34

35Hz - 43kHz

28Hz

4.0 - 34

33Hz - 43kHz

27Hz

HF limit - 10 dB 45kHz

45kHz

100mm

90dB

45kHz

400mm

91dB

Rec.rear to wall off- set 300mm

SPL (1w @ 1m) 87dB

200mm

300mm

88dB

89dB

Distortion 20 – 600Hz 100dB @1m <3%

600 - 50KHz <1%

<3%

<1%

Power Handling

Continuous Programme 75W

Recommended Amplifier Power 40 - 150W

Max Peak SPL 106dB

100W

150W

250

300W

50 - 200W

108dB

60 - 300W

109dB

100 - 500

100 - 600

115dB

116dB

Horizontal Coverage (nom.) 90º to 14kHz

Vertical Coverage (nom.) 70º to 12kHz

90º to 14kHz

70º to 12kHz

90º to 14kHz

70º to 12kHz

90º to 14kHz

70º to 12kHz

90º to 14kHz

70º to 12kHz

Enclosure type: Bass/Mid Ported

Volume: Bass / Mid 18L / NA

System Fb 40Hz

Ported

Ported / Sealed

33L / 10L

Ported / Sealed

30 / 14L

Ported / Sealed

51 / 22L

27L / NA

40Hz

35Hz

30Hz

Crossover Frequencies 650Hz , 3kHz

700 Hz , 3kHz

650Hz , 3kHz

Construction Material 15 & 30mm MDF

18 & 33mm MDF

18 & 34mm MDF

Product Dimensions mm 510 X 230 X 360

Nett Weight 12.0kg

505 X 255 X 450

16.4kg

1005 X 260 X 410 1140 X 260 X 410

28.0kg 34.5kg

1210 X 315 X 440

40.0kg

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Opus² - Tri-Centre

Transducer complement Four

Opus² - AvS

Three

Opus² - AvC

Three

Opus² - Tri-Surround

Five

Bass Driver Cone 170mm x 2

Soft Dome Mid-range 3” 75mm textile

Soft Dome Tweeter 1” 25mm textile

Nominal impedance 6 Ohms

170mm

3” 75mm textile

1” 25mm textile

6 Ohms

4.0 - 18

45Hz - 43kHz

40Hz

3” 75mm textile

1” 25mm textile

6 Ohms

4.0 - 18

45Hz - 43kHz

40Hz

3” 75 mm textile

1” 25 mm textile

Ohms

Impedance variation ohms 4.5 - 24

Frequency Response +/- 3dB 75Hz - 43kHz

LF limit -10 dB 70Hz

4.0 - 12

60hz - 43kHz

50hz

HF limit - 10 dB 45kHz

45kHz

45Hz

Rec.rear to wall off- set 100 - 400mm

SPL (1w @ 1m) 89dB

0mm

0 m

100mm

88dB

89dB

Distortion 20 – 600Hz 100dB @1m 20-200 <5%

600 - 50KHz 200-45k <1%

<3%

<1%

Power Handling

Continuous Programme 200W

Recommended Amplifier Power 70 - 400W

Max Peak SPL 113dB

100W

40 - 200W

108dB

40 - 200W

108dB

40 - 200W

110dB

Horizontal Coverage (nom.) 80º to 12kHz

Vertical Coverage (nom.) 30º to 12kHz

90º to 14kHz

70º to 14kHz

90º to 14kHz

70º to 14kHz

180º to 10kHz

90º to 12 Hz

Finishes (all models)

Piano / Satin Cherry

Enclosure type: Bass/Mid sealed

Volume: Bass / Mid 25L / NA

System Fb 60Hz

sealed

ported

Ported / Sealed

30 / 14L

9L / NA

12L / NA

60Hz

Piano / Satin Rosewood

Piano / Satin Birds Eye

Piano Black

70Hz

30HZ

Crossover Frequencies 900Hz, 4kHz

Construction Material 15 & 25mm MDF

700Hz, 4kHz

15 & 25mm MDF

700 Hz, 3.5 kHz

15mm MDF

650 Hz , 3 kHz

18 & 33mm MDF

Product Dimensions mm 242 X 575 X 320

Nett Weight 14.7kg

500 X 230 X 140

9.0kg

230 X 500 X 140

9.0kg

280 X 460 X 180

10.6kg

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IAG House, Sovereign Court

Ermine Business Park

Huntingdon, Cambs

PE29 6XU

Tel: +44 (0) 1480 447700

Fax: +44 (0) 1480 431767

www.wharfedale.co.uk

The information in this brochure is subject to change without notice.

All rights to the mentioned trademarks reside with their respective companies.

Wharfedale is a member of the International Audio Group.

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