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Opus 1
Opus 2
Opus 3
Tri-centre
Tri-surround
USER MANUAL
2
User Warnings
Quick Start Guide
About Your Loudspeaker
Specifications
Quality Assurance
Certificate of Quality Assurance
Systems and Driver Unit Test Reports
4 x White Cotton Gloves
Accessories
CONTENTS
WITHIN THIS PACK
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Please read the following notes carefully. They will help you to install your loudspeakers correctly and safely.
Switch off the amplifier and all sources before making connections to your sound system. When you switch on
the system or change sources, set the volume control to minimum and turn up the level gradually.
The position of your Volume Control is NOT a reliable guide as to the maximum capabilities of your system.
Playing the system with extreme settings of volume and tone controls may damage the amplifier and loudspeakers.
Do not connect loudspeaker terminals to the mains supply.
Ensure that your loudspeakers are correctly wired and are in phase.
Do not subject your loudspeakers to excessive cold, heat or sunlight.
WARNING: To reduce the risk of fire or electrical shock do not expose this product to rain or moisture.
The product must not be exposed to dripping and splashing and no object filled with liquids – such as a vase
of flowers – should be placed on the product.
No naked flame sources – such as candles – must be placed on the product.
Do not place heavy objects on top of loudspeaker cabinets. If you play them with the grilles removed be
careful to protect the drive units from children and pets.
Do not use makeshift stands. Always fit a manufacturer’ approved stand using the instructions and the
fixings provided. Your dealer will advise you.
Do not attempt to dismantle the loudspeaker. There are no user serviceable parts inside and you will
invalidate the warranty.
Site your loudspeaker at least 0.5m away from TV sets and magnetic storage media.
USER WARNINGS
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QUICK SETUP GUIDE
(Opus Series)
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Setting Up the Opus Series
Safely unpacking
Check you have
Loudspeaker preparation
Positioning stereo Hi-fi speakers
Connecting stereo Hi-fi speakers
Positioning AV speakers
Connecting AV speakers
Setting up AV systems
Looking after your loudspeakers
6
Always take care when lifting heavy objects.
Lift the speakers out by their sides.
SAFELY UNPACKING
If possible, keep the packaging in case you need to
move or return your speakers.
Carefully remove each loudspeaker from its packing carton.
Be especially careful when removing the polythene bag. The
speakers come with the plinth complete and already fitted.
The carton top says, “Open other end”. So you,
– Open the bottom
– Remove polystyrene
– Open bag containing speaker
– Tape the carton flaps back
– Turn over carton with loudspeaker still inside
– Lift carton off, leaving loudspeaker standing on the floor
– Be careful not to damage soft floor surfaces with spikes
Your Opus speakers are heavy. Take care when
removing them from their packaging.
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CHECK YOU HAVE
Opus 1, 2, 3 Opus Tri-Centre Opus Tri-Surround
User Pack
User Pack User Pack
Accessories:
• 4 Gloves
• Long spike set (4)
• Soft floor spike seats
• Foam pad (4)
• Bi-wire Links (4)
Accessories:
• 2 Gloves
• Rubber Feet
• Bi-wire Links
Accessories:
• 2 Gloves
• Rubber Feet
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LOUDSPEAKER PREPARATION
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OPUS 1, 2 & 3 SPIKES
Your floor standing Opus speakers are delivered with the plinth and spikes already
fitted. Levelling/seating the speaker is best achieved by adjusting either of the rear
spikes until the speaker is stable without rocking. Release the top knob, on the
underside. Turn spike out and down to level. Re-lock top knob.
For wood or soft floors 8 metal spike seats and self-adhesive pads are provided for
use as required. A set of extra long spikes for deep carpets are provided and may be
used as required.
WARNING: Opus speakers are heavy and the spikes can penetrate softer floors
materials over extended periods.
CONNECTIONS AND TERMINALS
Choosing and Preparing Cables
Specialist audio cable usually offers better performance than general purpose
‘bell’ or ‘zip’ wire.
Choose a cable of suitable diameter – cable that is too thin will limit the
dynamics of the sound and may impair the bass response. Audio cable is
polarised, with two cores of different colours, or often a raised rib of coloured
tracer in the case of twin cable.
Split the twin cores to a depth of about 40mm. Carefully strip the insulation
from each end, leaving about 10mm of bare wire. If the cable is stranded,
lightly twist to gather any loose strands.
Crossover Networks
OPUS front and centre loudspeakers use a specially designed bi-wireable
crossover panel with six terminal binding posts. Please follow the drawing carefully to see the correct orientation of the loudspeaker terminals. The upper terminals connect to the treble unit, the middle pair to the mid-range and the
lower pair to the bass units. As supplied, the treble terminal pair is connected
to the mid-range pair and bass terminal pair via removable metal straps.
These should be lef t in place for standard single cable installations.
The OPUS surround uses a conventional twin terminal crossover panel.
Connecting Loudspeaker Terminals
Unscrew the terminal. Thread the bored end of each cable through the hole in
the bottom of the terminal post. Ensure that there are no loose strands which
may touch adjacent terminals. Retighten the terminal securely.
NOTE: When connecting loudspeakers, the cables to left and right channels
should be of equal length, regardless of the distance of the speakers from the
amplifier. This applies to front and rear channels.
40mm
10mm
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POSITIONING FRONT SPEAKERS
Angle speakers inward by 5º to 30º for a
clearer, more tuneful mid range.
If the loudspeakers are placed too close to the walls the bass will increase but may be
boomy and indistinct. If the loudspeakers are placed further away from the walls, the
inward angle may be increased by upto 40%, although this may restrict the width of the
optimum listening position. As personal taste plays a large role, experiment with different
configurations and play a wide range of programme before finalising the position of your
speakers.
Positioning the speakers. Place the speakers so
that you are the same distance from each. The
distance between the speakers should be the
same as between you and the speakers.
For best results the speakers should be at best
10 inches (20cm) in front of a wall and at least
30 inches (70cm) from any corner.
70cm
20cm
º
0
3
-
5
º
0
4
-
º
5
1
º
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CONNECTING HIFI SPEAKERS
Single wired a single amplifier, tri-link bar is fitted
Tri or Bi-wired – a single amplifier, with separate wires
to drive the bass/mid unit and the treble unit.
Additional links are supplied to allow Bi-wiring.
Tri or Bi-amplified – two or three amplifiers. One drives
each section or 2 sections with Bi-wire link e.g mid/hf.
(Remove all link sections when Tri-Amping)
Important Note, please make sure that heavy multi-standard
cables are well connected and clamped. Single loose strands
arcing can cause noise in the woofers like a faulty speaker.
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Using separate cables for
treble, mid and bass units in
Tri or Bi-wiring configuration
reduces intermodulation
effects and improves
headroom and clarity. To
Bi-wire, you will need to install
two lengths of twin core cable
between the amplifier and
each loudspeaker.
Unscrew each terminal a few
turns and remove the metal
tri-link straps. Use the
bi-link straps (supplied in
accessories) to connect the
treble and mid-range
terminals. Connect the cables
between the amplifier and the
loudspeakers as indicated and
re-tighten all the terminals
securely.
Note: Some amplifiers have
two pairs of output terminals
to facilitate bi-wiring but this is
not essential. The advantages
of bi-wiring are fully retained if
your amplifier has only one
pair of output terminals per
channel (as in the illustration).
RIGHT
SPEAKER
LEFT
SPEAKER
RIGHT
SPEAKER
LEFT
SPEAKER
Amp
Amp
R.SPKR
R.SPKR
AMPLIFIER
L.SPKR
L.SPKR
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POSITIONING AV SPEAKERS
THE HOME THEATRE ENVIRONMENT
Front and Effects Channels
The front loudspeakers are placed on either side of the television screen, 2 to 3 metres apart. The speakers
should be angled slightly so they are aimed towards the listeners.
As the rear surround channels are the ‘effects’ channels the reproduced sound should be as room filling as
possible. We recommend placing the speakers in a high position, behind the listeners head. If the rear wall is
more than 1 metre behind the listening seat, position the units on the side walls. If the walls are a long way
from the listening seat, consider stand mounting the loudspeakers.
Most of the dialogue comes from the centre loudspeaker. Speech should appear to originate from the actors
mouths. Operating height is important. Ideally the front and centre channel speakers should be at the same
height. For this reason the centre channel speaker is best operated above the television monitor.
The OPUS Tri-Centre Loudspeaker
The loudspeaker should be positioned centrally between the loudspeakers close to the television and mounted
either above or below the screen.
The loudspeaker should be located on a stable flat surface to avoid any danger of the cabinet moving when it
is vibrated by high sound levels. If you mount the unit on top of the television, move it forward so that the
front grilles are level with or slightly in front of the screen. This will reduce reflections from the screen and the
top of the cabinet.
Although you can place the centre channel loudspeaker under the TV monitor, this should be regarded as a
second best. The preferred position is always above the monitor.
The OPUS Tri-Surround Loudspeaker
Connect the cable to the speaker. The speaker should ideally be sited 600mm – 1.5 metres above the listening position and 2.5 - 3.5 metres apart, central to the listener and behind the listening position, preferably on
a rear wall. If the listening position is some distance from a rear wall, the loudspeakers may be mounted on
opposite side walls but always behind the listening position.
Ensure that the wall is strong and can support the product. Drill two 5mm holes in the wall 160mm apart and
horizontally aligned. Fix a suitable No 8 round head screw firmly into each hole using appropriate wall plugs.
Leave a stub of 5mm protruding from the wall. Align the holes in the mounting brackets over the screw heads
and carefully lower the unit onto the screws. The speaker can now be securely attached with the spacers resting against the wall. Now connect the speakers to the amplifier before final mounting of the surrounds.
System with Rear Mounted Tri Surrounds
System with Side Mounted Tri Surrounds
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Subwoofer
As the ear is unable to detect the direction from which deep bass originates, this
allows you freedom to position a subwoofer according to the level of bass required.
Placing the subwoofer near a corner or particularly close to a wall will boost the bass
but may impair clarity.
The performance of Home Theatre systems can often be enhanced by using a pair
of subwoofers.
OPUS Surround Loudspeaker
Four self adhesive spaces are provided with each unit. Attach one close to each
rear corner of the cabinet. This speaker is designed primarily for wall mounting –
please see separate section for this topic.
OPUS Centre Loudspeaker
A set of self adhesive pads is provided. Peel off the backing material and fix a
pad close to each corner of the bottom surface of the loudspeaker.
POSITIONING & CONNECTING AV SPEAKERS
System with Subwoofer Speakers
Single wiring shown
Single wiring shown
SUB
RIGHT
REAR
LEFT
CENTRE
RIGHT
FRONT
WOOFER
LEFT
LEFTRIGHT
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Setting Loudspeaker Sizes
Many digital AV Processors require you to specify the size of speakers in all channels. These are usually
‘Large or small’. For Opus set the front speakers to ‘large’, set the centre to ‘large’ and the surrounds to
small. The subwoofer then will reproduce only the LFE bass signals.
If you are not using a subwoofer: Set the front speakers to set the subwoofer option on the processor to
‘Off’ or ‘No’. The front channels will now receive all the system bass.
(If you are using a subwoofer: When front speakers are set to small the bass for these channels will
pass into the subwoofer. If you choose large for the front channels, bass will be reproduced from the
front speakers and the sub will just control the LFE channel).
Setting Levels
Once the loudspeaker settings have been finalised, put the AV amplifier into its “test” mode (see
instructions supplied with your processor). Adjust the level of each channel in turn until all channels are
reproduced at equal loudness.
On some programme material the surround channel may seem lower than the front. Do not readjust
this level. You may, however, need to adjust the subwoofer output level. Avoid setting too high a level or
you will swamp the sound with bass. This can be tiring to listen to, and may limit the subwoofer’s ability to respond to large bass transients. You should also set a sensible level going into the subwoofer
from the AV processor.
SETTING UP AV SYSTEMS
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Delay Settings
Many AV processors feature delay settings. The purpose of delay is to enable surround and dialogue
information to arrive at the listener’s ears at the same time as the front channels, even when the listening seat is in a non-ideal position. On some processors, this can be achieved by setting the distance
from the listening position to each speaker in turn, but other systems allow only a time delay setting.
RReeaarr DDeellaayy
: If the listening position is equidistant from the front and rear speakers, a low
delay setting should be set. The closer the listener is to the rear speakers the higher the
delay setting used should be.
CCeennttrree DDeellaayy
: If the centre speaker is level with (or slightly behind) the front speakers, set
the delay to zero. If the centre speaker is forward of the front speakers, increase the delay.
LFE
In the cinema the low frequency effects channel is an extra bass channel with its own subwoofer and
not a regular subwoofer channel. In domestic systems the LFE channel typically feeds into the subwoofer. Where no subwoofer is used, the LFE signal is combined with front channel information and sent
to the front speakers. When you set the LFE level at your AV processor, use care as the powerful low frequencies can overload domestic loudspeakers.
If you hear popping or thumping noises coming from the front loudspeakers or subwoofer, immediately
turn the AV Processor’s volume level down and then lower the LFE level. This should cure the problem. If
it does not, lower the volume level at the subwoofer (if you are using one) until the problem disappears.
Please read the relevant sections of your AV amplifier manual and familiarise yourself with the various
issues. If you are unsure, consult your dealer for help.
Phase
A home theatre system should have a precise front stage, a diffuse rear stage and good localisation of
dialogue. If the colours on the loudspeaker terminals do not correspond with those on the amplifier, the
sound will appear poorly focussed or ‘Out of phase’. For this reason it is essential that the speakers are
connected accordingly to the wiring diagrams in this manual.
SETTING UP AV SYSTEMS
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Do not open the speakers; there are
no user serviceable parts inside.
Avoid getting any liquid behind the grille.
LOOKING AFTER YOUR LOUDSPEAKER
Remove marks from the cabinet and polish it
with a soft, slightly damp cloth.
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For technical support, servicing or product queries and information please contact either
your local retailer or the offices below.
TECHNICAL SUPPORT AND INFORMATION
UK
Wharfedale International Ltd.
IAG House, Sovereign Court,
Ermine Business Park,
Huntingdon. PE29 6XU
England
Tel : +44 (0) 1480 447700
Fax : +44 (0) 1480 431767
www.wharfedale.co.uk
USA
IAG America, Inc.
15 Walpole Park South,
Walpole,
MA 02081
USA
Tel: +1 (0) 508 8503950
Fax: +1 (0) 508 8503905
www.iagamerica.com
ASIA
Room 2310 - 2311 Press Building,
Shennan Road C,
Shenzhen,
China
Tel: +86-755-82091200
Fax: +86-755-82091205
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ABOUT YOUR LOUDSPEAKER
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The OPUS is a new series of loudspeakers. They are large format loudspeakers, utilising multiple drive units.
The loudspeaker meets the demands of the most discerning audiophile.
These 3 way loudspeakers exhibit exceptional performance characteristics based upon the following concepts.
Very low distortion across the entire audio band.
Low excursion requirement of the cone drivers.
High flux magnet systems enabling good dynamic response and impulse control.
Broadband dispersion for excellent stereo image and staging.
Careful attention to component design, operation, integration and acoustics.
THE CABINET
The enclosure of your speaker is finished to a high-quality furniture standard. Real wood
veneers have been selected and carefully patterned matched by hand. Over a period of several
days a high gloss ‘Piano’ finish has been achieved. This involves several coatings of lacquers
being applied, each being cut and polished before the next coat is applied. Only through this
time-consuming and skilled technique, can we achieve the necessary depth and lustre of gloss.
Instead of the usual cuboid shape of speaker cabinet, Opus is built with a beautiful curvaceous
design, with a special purpose:- to reduce to negligable levels any internal cabinet standing
waves and reflections. Parallel-sided tall boxes promote the creation of acoustic wave formation
within the box by reflection up and down the length, these can add and subtract creating
anomalies in the forward response. The multiple cur ved and braced interior of the Opus cabinet prevents this and results in a much clearer, more precise sound.
Skilfull engineering in ‘MDF’ or Medium Density Fibre Board, universally known to be one of
the best enclosures materials, has resulted in an ideally shaped, very strong, internally multiple
braced, low resonance structure.
‘THE OPUS SERIES’
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THE DRIVE UNITS
THE BASS DRIVERS
The bass driver(s) incorporates a new design of cone utilising our own new bi-carbon weave process.
Carbon fibre has immense longitudinal strength and is used in many structures where high strength
and light weight are key attributes. Carbon fibre can be found liberally used in Formula 1 Racing Cars,
Aeroplanes, Boats, Spacecraft and even Golf Clubs.
These bundles are woven and impregnated with special bonding resins that are subsequently pressure
formed and heat cured. The resulting material is stiff, rigid and exhibits very low levels of internal
resonance. Consequently, energy losses in the cone transfer mechanism are very low.
Similarly, lateral voice coil strength is very high. We use a combination of half hard aluminium and
resin bonded glass fibre. This, in turn, contributes towards some of the lowest distortion figures ever
seen in conventional drivers. The dust cap/cover is of the same material as the cone.
The bass drivers operate only over the low frequency range. They are only used over their true pistonic
range. The cone is terminated with a conventional large half roll of synthetic butyl rubber with excellent
inherent damping qualities.
A high performance traditional ferrite magnet system is used. Motional noise can be a problem with
high output bass systems. We address this by moving air through vents in the voice coil. The magnet
systems is also fully vented throughout.
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THE 75mm 3” SOFT DOME MIDRANGE
A studio monitor quality large dome mid-range is used to cover the crucial midband frequencies. The key feature of this driver
is exceptionally low distortion over its entire working range, typically less than 1% when producing 100dB at 1 metre. It is
mounted in a custom matched fascia plate to provide partial horn loading and giving a broad angle of dispersion to its upper
crossover point. The fascia plate is constucted from die cast aluminium, designed to place the units as close as possible for
optimum integration and to create a point source effect. It has a large 75mm 3” voice coil again based on a rigid half hard
aluminium former. The dome is pressure equalised by an underside baffle and chamber.
THE 25mm 1” SOFT DOME TWEETER
The highest frequencies are also handled by a soft dome driver. Our extensive research has proven these are a better choice
than the metallic based domes that typically add their own character to the treble.
A feature of the tweeters, as with the mids, is wide dispersion and very low distortion, again typically less than 1% at 100dB
at 1 metre. The unit features a high flux neodymium magnet structure, producing a typical efficiency of 93dB 1W@1m. This
unit has a frequency response extending far beyond audible frequencies to around 45kHz.
THE CROSSOVER AND WIRING
Monster Cable XP is used throughout the internal wiring (USA only - other countries use alternative brands of high-quality
OFC cable). High quality printed circuit boards are used, and all connections are made to audiophile standards.
All inductors used are air-cored and use large gauge wire for very low insertion loss.
All capacitors used are either, low loss, low ERC polypropylene or high quality audio grade reversable electrolytics.
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SPECIFICATIONS
Transducer Complement
Cone Bass driver
Soft Dome Mid-Range
Soft Dome Tweeter
Nominal impedance
Impedance variation (ohms)
Frequency response +/- 3dB
Low frequency limit -10dB
Upper frequency limit -10dB
SPL 1W @ 1m
Distortion 20 – 600Hz 100dB@1m
600 – 50kHz
Power Handling
Continuous Programme
Recommended Amplifier Power
Max Peak SPL
Nominal coverage horizontal
Nominal coverage vertical
Enclosure type bass/mid
Volumes bass/mid
System Fb
Crossover frequencies
Construction material
Finish
Component part numbers
Bass driver
Midrange speaker
Twe eter
Product dimensions H x W x D
Net weight
Crate dimensions H x W x D
Gross weight
3 Way
8” 200mm
3” 75mm
1” 25mm
6Ω
4.2–40
37Hz–44kHz
26Hz
45Hz
89dB
>3%
>1%
150 Watts
60–300W
109dB
90 to 14kHz
70 to 12kHz
ported / sealed
44 / 10 litres
40Hz
700Hz, 4kHz
18 & 33mm MDF
Real wood veneers of Birds Eye Maple, Rosewood, Black, all in deep gloss piano finish
2096
0723
0326
995 x 260 x 410
25.5kg
1120 x 380 x 550
30.8kg
3 Way
8” 200mm x 2
3” 75mm
1” 25mm
6Ω
4.5–37
33Hz–44kHz
24Hz
45Hz
90dB
>3%
>1%
250 Watts
100–500W
115dB
90 to 14kHz
70 to 12kHz
ported / sealed
54 / 10 litres
38Hz
700Hz, 4kHz
18 & 33mm MDF
2097
0723
0334
1120 x 260 x 410
29.5kg
1240 x 380 x 550
35.3kg
OPUS 1 OPUS 2
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3 Way
10” 250mm x 2
3” 75mm
1” 25mm
6Ω
4.0–28
30Hz–44kHz
23Hz
45Hz
91dB
>3%
>1%
300 Watts
100–600W
116dB
90 to 14kHz
70 to 12kHz
ported / sealed
71 / 13 litres
35Hz
700Hz, 4kHz
18 & 34mm MDF
2542
0723
0334
1195 x 315 x 440
34.4kg
1310 x 510 x 600
42.2kg
3 Way
6.5” 170mm x 2
3” 75mm
1” 25mm
6Ω
4.5–24
75Hz–44kHz
70Hz
45Hz
89dB
20–200 >5%
200–45k>1%
200 Watts
70–400W
113dB
80 to 12kHz
30 to 12kHz
sealed
25 litres
75Hz
900Hz, 4kHz
15 & 25mm MDF
17104 x 2
0719
0334
232 x 575 x 320
13.3kg
730 x 370 x 480
16.2kg
OPUS 3 TRI-CENTRE
3 Way
6.5” 170mm
3” 75mm x 2
1” 25mm x 2
6Ω
–
60Hz–44kHz
50Hz
45Hz
89dB
>3%
>1%
100 Watts
40–200W
110dB
180 to 10kHz
90 to 12kHz
ported
12 litres
60Hz
700Hz, 3.5kHz
15mm MDF
17105
0723 x 2
0326 x 2
280 x 460 x 180
9.2kg
445 x 560 x 581
22.2kg (pair)
TRI-SURROUND
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Frame material
Cone & dome material
Surround
Spiders
Coil size & type
Winding spec
Magnet (D1 x D2 x H)
Magnet weight
Gap flux density
Top plate thickness
Optimum working range
Venting
TThhiieellee SSmmaallll ppaarraammeetteerrss
Effective cone diameter
Re
Fs
Qms
Qes
Qts
Mms
Cms
Vas
BL
Aluminium/Steel
Woven carbon fibres
s r b p Single roll
Single
38mm Aluminium
2 layer round cu x 15mm
115 x 56 x 20 ferrite
760gm
1.1T
6mm
25Hz – 500Hz
Coil, pole
200mm
8Ω
39Hz
3.12
1.08
0.8
38gm
0.43mm/N
59L
8.38f/m
250mm 10” 200mm 8” 170mm 6.5”
Aluminium/Steel
Woven carbon fibres
s r b p Single roll
Single
38mm Aluminium
2 layer round cu x 10mm
115 x 56 x 20 ferrite
760gm
1.1 T
6mm
25Hz–800Hz
Coil, pole
165mm
4.5Ω
39Hz
2.31
0.57
0.45
29gm
0.55mm/N
34L
7.64t/m
Aluminium/Steel
Woven carbon fibres
s r b p Single roll
Single
25mm Aluminium
2 layer round cu x 11mm
80 x 32 x 15 ferrite
300gm
0.77 T
6mm
40Hz–1000Hz
Coil, pole
140mm
15.5Ω
54Hz
3.33
1.35
0.96
17gm
0.49mm/N
16L
8.26
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Part number
Dome material & size
Coil size & type
Magnet d1 x d2 x h
Magnet weight
SPL 1w @ 1m
Fs
Frequency range -3dB
Distortion at 100dB @ 1m
0719 & 0723
75mm textile
75mm aluminium
70 x 32 x 15
248gm
93dB
500Hz
400Hz–5kHz
typically < 1%
MIDRANGE SPECIFICATIONS
Part number
Dome material & size
Coil size & type
Magnet d1 x h
Magnet weight
SPL 1w @ 1m
Fs
Frequency range -3dB
Upper frequency limit -10dB
Distortion at 100dB @ 1m
0326 & 0334
25mm textile
25mm aluminium
25.4 x 4mm Neodynium
14g m
92dB & 94dB
1 kHz
800Hz–40kHz
45kHz
typically < 1%
TWEETER SPECIFICATIONS
Crossover sections
Type
Wiring
Connections
CCrroossssoovveerr ppooiinnttss aatt --66ddBB
Bass
mid low
mid high
Twe eter
3 way
Butterworth
Monster cable XP (USA only)
Amp/solder
400 & 900Hz
1000–1400Hz
3300–4000Hz
3300–4000Hz
CROSSOVER SPECIFICATIONS
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R=1Ω/5W
L=0.9mH/OI 1.2
C=4.7uF/250Vx2
C=50uF/50V
C=32uF/50V
C=32uF/160V
C=32uF/50V
C=110uF/50V
C=4.7uF/250V
C=4.7uF/250V
C=4.7uF/250V
R=15Ω/15W
L=0.23mH/OI 0.53
R=15Ω/10W
L=0.23mH/OI 0.53
R=10Ω/10W
L=0.3mH/OI 0.54
L=3mH/OI 1.0
R=2.2Ω/25W
C=4-7uF/250V
R=1.5Ω/5W C=4uF/50F
C=4uF/250F
C=4.7uF/250FR=1Ω/5W
C=10uF/250FC=4.7uF/250F
L=0.68mH/OI 1.2 R=1.8Ω/25W
2096 0723 0326
2097x2 0723 0334
2542x2 0723 0334
17104x2 0719 0334
17105 0723x2 0326x2
C=4.7uF/250Vx2
L=4.4mH/OI 1.2
L=0.6mH/OI 0.74
L=0.6mH/OI 1.2
R=2.2Ω/25WL=0.5mH/OI 1.2
L=1.5mH/OI 1.2
C=10uF/250F
C=8.2uF/250F
L=1.65mH/OI 1.2
C=10uF/250F
L=2.4mH/OI 1.2
L=0.8mHOI 5.2
C=6.8uF/250V
R=8Ω/30W
L=0.3mH/OI 0.74
C=6.8uF/250V
L=3mF/OI 1.0
R=15Ω/10W
L=0.25mH/OI 0.53
opus
26
QUALITY MANAGEMENT
Your Opus loudspeakers have been constructed to the highest standards of quality
throughout.
The acoustic components and the whole system have been manufactured to very tight
tolerances of +/- 1 decibel of sound pressure level for each driver throughout the operation
range of the unit.
All drive unit components are serially numbered and the original test record set for your
loudspeakers is retained on file in our factory quality control department.
This enables us to give a extended guarantee of identical replacement parts should they ever
be required.
A copy of these test reports is included in the back of this manual. These should be retained
for future reference.
A certificate of conformance to the original prototype specification, confirmed by the Opus
designer and engineering director is included in this pack.
Wharfedale International Ltd.
IAG House, Sovereign Court, Ermine Business Park, Huntingdon. PE29 6XU. England.
Tel : 0845 458 0011 / +44 (0) 1480 447700 Fax : +44 (0) 1480 431767
www.wharfedale.co.uk
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