Bedienungsanleitung Wharfedale Opus 2 (Seite 15 von 20) (Englisch)

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Bass Drivers

Opus ² bass units are of two main types.

The smallest cabinets use a triple laminated cone of glass /carbon/ glass . Smaller cabinets intensify reflections

that can pass back through the cone. The special “tri-lam” construction minimises these reflections because of

its extreme rigidity - the small increase in cone mass being more than offset by the performance improvements.

The larger cabinets use larger drivers and here low cone mass is of crucial importance im maintaining impulse

response and performance.

Our latest cone designs for the large format models utilise our own

bi-carbon weave and laminating processes. Carbon fibre has

immense longitudinal strength and is used in many structures

where high strength and light weight are key requisites examples

of structures using carbon fibre include Formula 1 racing cars,

aeroplanes and spacecraft. The carbon fibre bundles are woven

and impregnated with special bonding resins that are

subsequently pressure formed and heat cured. The resulting

material is exceptionally rigid and exhibits very low levels of

internal resonance. As a consequence, energy losses in the cone

transfer mechanism are very low.

Because our bass drivers are just that, our bass cones maintain

true pistonic action over their entire designed low frequency range. The cone is terminated with a conventional

large half roll of synthetic butyl rubber with proven damping qualities.

Voice coils in high performance loudspeakers have to withstand extremes of mechanical stress and heat. The

lateral strength of Opus² voice coils is very high. We use a combination of half hard aluminium and resin

bonded glass fibre. The ability of our voice coils to resist deformation under extreme stress contributes towards

some of the lowest distortion figures ever seen in conventional drivers. The coils are covered with a dust cap of

the same material as the cone.

Large, high performance traditional ferrite magnet systems

are used throughout. All Opus²large format speakers are

fully magnetically shielded with additional bucking magnets

and steel covers on the bass driver magnets. You can

operate an Opus² speaker close to the most magnetically

sensitive TV monitor with no fears over screen interference.

Motional noise can be a problem with high output bass

systems. The high pressure injection die cast aluminium

chassis used on our bass drivers feature an 'open design'

where narrow legs maximise the open areas of the frame to

all but eliminate rear reflections. Trapped or compressed air

within the driver unit can easily move through vents in the

voice coil, through the magnet structure, through the

spider, and from the underside of the central cap both

through holes in the cone and the magnet central core.

The Opus² Drive Units

Opus²

Opus²Opus²

Wall Mounting AV Speakers

380 mm

190 mm 190 mm

135 mm

Opus²AvC

120mm

60mm

400mm

Opus²AvS

Opus² Tri-Sat

The AvC and AvS speakers feature a three point mounting system. Two point mounting is the

simpler option and this is the method to use unless you feel you need the security of three point

mounting. Ensure the wall is sound, free of obstructions, hidden pipes etc. and capable of

supporting the loudspeaker plus a small amount of pulling force. You will also need suitable wall

fixings and some 38mm No 8 Round Head screws.

Draw a horizontal line on the wall and mark off the

mounting centres of your loudspeaker referring to the top

dimension of the drawings.

Drill and plug two holes.

The screw header consists of a plastic spacer and a

washer. Thread a washer and a plastic spacer onto each

screw. Thread one of the screws through one eyelet of the

security strap. Let the security strap hang free.

Screw both header assemblies firmly to the wall.

Do not over tighten the screw. The spacer should rest

against the wall and not be driven into the surface.

1: Getting started

320 mm

60mm

Security strap mounting

2: Attaching the loudspeaker

Remove the plastic insert from the security mounting thread

between the keyhole slots.

Connect the connecting wire to the loudspeaker but do not

connect the cable to the amplifier. You will need to use low

profile cable -your dealer will recommend a suitable product.

Lift the loudspeaker up to the mounting position. With the

screw, attach the security strap to the loudspeaker security

mounting.

Align the keyhole slots over the screw headers and gently

pull down until the speaker is securely fastened. You may

now connect the loudspeaker to the amplifier.

On the Av speakers, ensure the connecting cable does not

foul the lower keyhole slot.

This operation may need two people. If you are in any doubt

about your ability to carry out this procedure, consult a

suitably qualified builder or domestic electrician.

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