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Wharfedale Opus 2 Manual

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Positioning AV Speakers
Front Loudspeakers:
Rear Surround channels:
Centre Channel:
The front loudspeakers are
placed on either side of the TV monitor, 2 to 3 metres
apart and somewhat above the listener. The speakers
should be angled slightly so they are aimed towards
the listeners.
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, an alternative position is 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. The front of
the cabinet should be level with the TV screen.
SUB
The Opus² Tri-Centre
The Opus² Tri-Surround
loudspeaker may be freestanding or mounted
on a stout shelf.
is designed for wall mounting. The unique
design of this loudspeaker enables its use either on the rear or the
side walls of the room. We suggest that you rear mount these
loudspeakers where possible.
The Opus²Av System
The Opus² Av System is a three speaker system. The
system comprises a pair of AvS Satellite loudspeakers
and a single AvC Centre channel loudspeaker. Both
loudspeakers are three-way units.
The loudspeakers are designed for wall mounting -
integral keyhole slots are provided and, for additional
safety, a security fixing kit is included with each
loudspeaker.
The Opus² AvC may be wall mounted on its integral
keyhole slots, or on a special mounting bracket. When
mounted on its bracket the speaker may be angled
vertically for optimum effect. The bracket mount is
shown in the illustrations.
The loudspeakers' small front to back profile makes
them ideal as partnering speakers for Plasma or LCD
screens.
The Opus² Av system may be used together with an
Opus² Subwoofer to add full 5.1 connectivity to a
conventional Stereo system - their 3-way design and
voicing making an ideal surround sound complement
to regular Opus² loudspeakers.
2 Channel System with Centre Channel Re-inforcement
SUB
5.1 System
Opus²
12
The 75 mm Soft Dome Midrange Unit
25 mm Soft Dome Tweeter
Crossover and Internal Wiring
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 concen-
tricity 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 cabinet
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 specially 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
All models feature printed circuit boards with large copper tracks to maximize signal transfer and component layouts designed to
eliminate inference from any residual stray magnetic fields. The printed circuit boards are mounted on vibration free mountings.
Most models have two printed circuit boards to separate the bass inductors 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
electrolytic capacitors specially selected for their outstanding audio properties.
These capacitors are marked with the ‘Wharfedale super audio capacitor’
logo. The internal cables used are specially made and assembled in our
factory: 4 multiple strand oxygen-free copper wires are plaited into a single
cable for all connection runs within the speaker.
.
Anatomy of a Midrange Dome
The Opus² Drive Units-2
Opus²Opus²
25
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