Wharfedale Speaker opus User Manual

opus  
USER MANUAL  
Opus 1  
Opus 2  
Opus 3  
Tri-centre  
Tri-surround  
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USER WARNINGS  
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.  
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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  
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Your Opus speakers are heavy. Take care when  
removing them from their packaging.  
Always take care when lifting heavy objects.  
Lift the speakers out by their sides.  
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  
If possible, keep the packaging in case you need to  
move or return your speakers.  
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Opus 1, 2, 3  
Opus Tri-Centre  
Opus Tri-Surround  
User Pack  
User Pack  
User Pack  
Accessories:  
Accessories:  
Accessories:  
4 Gloves  
2 Gloves  
2 Gloves  
Long spike set (4)  
Soft floor spike seats  
Foam pad (4)  
Rubber Feet  
Bi-wire Links  
Rubber Feet  
Bi-wire Links (4)  
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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.  
10mm  
40mm  
Crossover Networks  
OPUS front and centre loudspeakers use a specially designed bi-wireable  
crossover panel with six terminal binding posts. Please follow the drawing care-  
fully to see the correct orientation of the loudspeaker terminals. The upper ter-  
minals 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 left 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.  
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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.  
20cm  
70cm  
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.  
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.  
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RIGHT  
LEFT  
SPEAKER  
SPEAKER  
R.SPKR  
L.SPKR  
Single wired a single amplifier, tri-link bar is fitted  
RIGHT  
LEFT  
SPEAKER  
SPEAKER  
Using separate cables for  
treble, mid and bass units in  
Tri or Bi-wiring configuration  
reduces intermodulation  
effects and improves  
AMPLIFIER  
R.SPKR  
L.SPKR  
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  
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.  
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).  
Amp  
Amp  
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.  
1 0  
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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 listen-  
ing 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 rest-  
ing against the wall. Now connect the speakers to the amplifier before final mounting of the surrounds.  
System with Side Mounted Tri Surrounds  
System with Rear Mounted Tri Surrounds  
1 1  
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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.  
System with Subwoofer Speakers  
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.  
Single wiring shown  
SUB  
WOOFER  
RIGHT  
LEFT  
RIGHT  
LEFT  
REAR  
CENTRE  
FRONT  
Single wiring shown  
RIGHT  
LEFT  
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.  
1 2  
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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 abili-  
ty to respond to large bass transients. You should also set a sensible level going into the subwoofer  
from the AV processor.  
1 3  
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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 listen-  
ing 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.  
Rear Delay: 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.  
Centre Delay: 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 sub-  
woofer. 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 fre-  
quencies 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.  
1 4  
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Do not open the speakers; there are  
no user serviceable parts inside.  
Remove marks from the cabinet and polish it  
with a soft, slightly damp cloth.  
Avoid getting any liquid behind the grille.  
1 5  
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TECHNICAL SUPPORT AND INFORMATION  
For technical support, servicing or product queries and information please contact either  
your local retailer or the offices below.  
UK  
USA  
ASIA  
Wharfedale International Ltd.  
IAG House, Sovereign Court,  
Ermine Business Park,  
Huntingdon. PE29 6XU  
England  
IAG America, Inc.  
15 Walpole Park South,  
Walpole,  
Room 2310 - 2311 Press Building,  
Shennan Road C,  
Shenzhen,  
MA 02081  
China  
USA  
Tel: +86-755-82091200  
Fax: +86-755-82091205  
Tel : +44 (0) 1480 447700  
Fax : +44 (0) 1480 431767  
Tel: +1 (0) 508 8503950  
Fax: +1 (0) 508 8503905  
1 6  
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ABOUT YOUR LOUDSPEAKER  
1 7  
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‘THE OPUS SERIES’  
The OPUS is a new series of loudspeakers. They are large format loudspeakers, utilising multi-  
ple drive units.  
The loudspeaker meets the demands of the most discerning audiophile.  
These 3 way loudspeakers exhibit exceptional performance characteristics based upon the fol-  
lowing 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 curved and braced interior of the Opus cabi-  
net 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.  
1 8  
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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.  
1 9  
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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.  
2 0  
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SPECIFICATIONS  
OPUS 1  
OPUS 2  
Transducer Complement  
3 Way  
3 Way  
Cone Bass driver  
Soft Dome Mid-Range  
Soft Dome Tweeter  
8” 200mm  
3” 75mm  
1” 25mm  
6Ω  
8” 200mm x 2  
3” 75mm  
1” 25mm  
6Ω  
Nominal impedance  
Impedance variation (ohms)  
Frequency response +/- 3dB  
Low frequency limit -10dB  
Upper frequency limit -10dB  
SPL 1W @ 1m  
4.2–40  
37Hz–44kHz  
26Hz  
4.5–37  
33Hz–44kHz  
24Hz  
45Hz  
45Hz  
89dB  
90dB  
Distortion 20 – 600Hz 100dB@1m  
600 – 50kHz  
>3%  
>3%  
>1%  
>1%  
Power Handling  
Continuous Programme  
Recommended Amplifier Power  
Max Peak SPL  
150 Watts  
250 Watts  
60–300W  
100–500W  
115dB  
109dB  
Nominal coverage horizontal  
Nominal coverage vertical  
Enclosure type bass/mid  
Volumes bass/mid  
System Fb  
90 to 14kHz  
70 to 12kHz  
ported / sealed  
44 / 10 litres  
40Hz  
90 to 14kHz  
70 to 12kHz  
ported / sealed  
54 / 10 litres  
38Hz  
Crossover frequencies  
Construction material  
Finish  
700Hz, 4kHz  
18 & 33mm MDF  
700Hz, 4kHz  
18 & 33mm MDF  
Real wood veneers of Birds Eye Maple, Rosewood, Black, all in deep gloss piano finish  
Component part numbers  
Bass driver  
2096  
0723  
0326  
2097  
0723  
0334  
Midrange speaker  
Tweeter  
Product dimensions H x W x D  
Net weight  
995 x 260 x 410  
25.5kg  
1120 x 260 x 410  
29.5kg  
Crate dimensions H x W x D  
Gross weight  
1120 x 380 x 550  
30.8kg  
1240 x 380 x 550  
35.3kg  
2 1  
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OPUS 3  
TRI-CENTRE  
TRI-SURROUND  
3 Way  
3 Way  
3 Way  
10” 250mm x 2  
3” 75mm  
1” 25mm  
6Ω  
6.5” 170mm x 2  
3” 75mm  
1” 25mm  
6Ω  
6.5” 170mm  
3” 75mm x 2  
1” 25mm x 2  
6Ω  
4.0–28  
30Hz–44kHz  
23Hz  
4.5–24  
75Hz–44kHz  
70Hz  
60Hz–44kHz  
50Hz  
45Hz  
45Hz  
45Hz  
91dB  
89dB  
89dB  
>3%  
20–200 >5%  
200–45k>1%  
>3%  
>1%  
>1%  
300 Watts  
200 Watts  
70–400W  
113dB  
100 Watts  
40–200W  
110dB  
100–600W  
116dB  
90 to 14kHz  
70 to 12kHz  
ported / sealed  
71 / 13 litres  
35Hz  
80 to 12kHz  
30 to 12kHz  
sealed  
180 to 10kHz  
90 to 12kHz  
ported  
25 litres  
12 litres  
75Hz  
60Hz  
700Hz, 4kHz  
18 & 34mm MDF  
900Hz, 4kHz  
15 & 25mm MDF  
700Hz, 3.5kHz  
15mm MDF  
2542  
0723  
0334  
17104 x 2  
0719  
17105  
0723 x 2  
0326 x 2  
0334  
1195 x 315 x 440  
34.4kg  
232 x 575 x 320  
13.3kg  
280 x 460 x 180  
9.2kg  
1310 x 510 x 600  
42.2kg  
730 x 370 x 480  
16.2kg  
445 x 560 x 581  
22.2kg (pair)  
2 2  
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250mm 10”  
200mm 8”  
170mm 6.5”  
Frame material  
Aluminium/Steel  
Woven carbon fibres  
s r b p Single roll  
Single  
Aluminium/Steel  
Woven carbon fibres  
s r b p Single roll  
Single  
Aluminium/Steel  
Woven carbon fibres  
s r b p Single roll  
Single  
Cone & dome material  
Surround  
Spiders  
Coil size & type  
38mm Aluminium  
2 layer round cu x 15mm  
115 x 56 x 20 ferrite  
760gm  
38mm Aluminium  
2 layer round cu x 10mm  
115 x 56 x 20 ferrite  
760gm  
25mm Aluminium  
2 layer round cu x 11mm  
80 x 32 x 15 ferrite  
300gm  
Winding spec  
Magnet (D1 x D2 x H)  
Magnet weight  
Gap flux density  
1.1T  
1.1 T  
0.77 T  
Top plate thickness  
6mm  
6mm  
6mm  
Optimum working range  
25Hz – 500Hz  
Coil, pole  
25Hz–800Hz  
Coil, pole  
40Hz–1000Hz  
Coil, pole  
Venting  
Thiele Small parameters  
Effective cone diameter  
200mm  
8Ω  
165mm  
4.5Ω  
140mm  
15.5Ω  
54Hz  
Re  
Fs  
39Hz  
39Hz  
Qms  
Qes  
Qts  
3.12  
2.31  
3.33  
1.08  
0.57  
1.35  
0.8  
0.45  
0.96  
Mms  
Cms  
Vas  
38gm  
0.43mm/N  
59L  
29gm  
0.55mm/N  
34L  
17gm  
0.49mm/N  
16L  
BL  
8.38f/m  
7.64t/m  
8.26  
2 3  
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opus  
MIDRANGE SPECIFICATIONS  
Part number  
Dome material & size  
Coil size & type  
0719 & 0723  
75mm textile  
75mm aluminium  
70 x 32 x 15  
248gm  
Magnet d1 x d2 x h  
Magnet weight  
SPL 1w @ 1m  
93dB  
Fs  
500Hz  
Frequency range -3dB  
Distortion at 100dB @ 1m  
400Hz–5kHz  
typically < 1%  
TWEETER SPECIFICATIONS  
Part number  
Dome material & size  
Coil size & type  
0326 & 0334  
25mm textile  
25mm aluminium  
25.4 x 4mm Neodynium  
14gm  
Magnet d1 x h  
Magnet weight  
SPL 1w @ 1m  
92dB & 94dB  
1 kHz  
Fs  
Frequency range -3dB  
Upper frequency limit -10dB  
Distortion at 100dB @ 1m  
800Hz–40kHz  
45kHz  
typically < 1%  
CROSSOVER SPECIFICATIONS  
Crossover sections  
3 way  
Type  
Wiring  
Butterworth  
Monster cable XP (USA only)  
Amp/solder  
Connections  
Crossover points at -6dB  
Bass  
400 & 900Hz  
1000–1400Hz  
3300–4000Hz  
3300–4000Hz  
mid low  
mid high  
Tweeter  
2 4  
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R=1/5W C=4-7uF/250V  
R=2.2/25W  
L=0.9mH/OI 1.2  
C=4.7uF/250Vx2  
L=3mH/OI 1.0  
2096  
0723  
0326  
R=1.5/5W  
C=4uF/50F  
L=0.68mH/OI 1.2  
R=1.8/25W  
C=4.7uF/250Vx2  
L=4.4mH/OI 1.2  
2097x2  
0723  
0334  
0334  
C=4uF/250F  
L=0.6mH/OI 0.74  
C=10uF/250F  
L=0.8mHOI 5.2  
L=2.4mH/OI 1.2  
2542x2  
0723  
R=1/5W  
C=4.7uF/250F  
L=0.6mH/OI 1.2  
C=8.2uF/250F  
L=1.65mH/OI 1.2  
17104x2  
0719  
0334  
C=4.7uF/250F C=10uF/250F  
L=0.5mH/OI 1.2  
C=10uF/250F  
R=2.2/25W  
L=1.5mH/OI 1.2  
17105  
0723x2  
0326x2  
2 5  
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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.  
2 6  
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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  
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