Wharfedale Pro AURA Series User manual

AURA Series

AURA 1 AURA 2 AURA 3 AURA 4 AURA C AURA CS

User Manual

Important Safety Information

Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions.

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Set the volume control at minimum when you switch on your system or change sources, and turn the level up gradually.

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Ensure that all loudspeakers in the system are correctly wired.

DO NOT subject your loudspeakers to excessive cold, heat, humidity or sunlight.

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DO NOT place heavy objects on top of loudspeakers.

Some manufacturers forbid the placing of objects on top of their TV sets. Check your TV handbook before installing the

speaker directly on your TV set. Consult your TV dealer if you are in any doubt.

DO NOT connect speaker terminals to the mains supply.

DO NOT dismantle the loudspeaker. There are no user-serviceable parts inside it and you will void the warranty by doing

so.

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the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

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this device.

Before installing this product read all these instructions!

This symbol indicates that there are important operating and maintenance instructions in the

literature accompanying this unit.

CONTENTS

Class-leading Innovation.

Stunning Realism.

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Loudspeaker Installation

Warranty Coverage

Technical Data

Class-leading Innovation.

Stunning Realism.

Founded in 1932, Wharfedale’s founder, Gilbert Briggs, had one goal in mind –

to bring music into the home by designing loudspeakers

that conveyed the impact, thrill and emotion of performance

in an entirely natural and realistic way.

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and continued to introduce technology that would enhance the listening experience –

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Today Wharfedale engineers follow the same dictum,

utilising technology where it truly matters to develop loudspeakers

that reveal the passion and excitement behind the musical performance.

AURA is the latest innovation in the family of class-leading Wharfedale speakers.

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AURA is another boundary-breaking model that challenges the norms of

value while delivering all the detail, energy and thrill of your music collection.

Designed & engineered

in the United Kingdom

Designer’s Notes

AURA continues the Wharfedale tradition of offering exceptional performance and value for money with a

range of speakers that offer the home listener and dedicated audiophile a combination of monitor-class audio

transparency together with class-leading levels of musical enjoyment.

Borrowing heavily from the advanced technology of the elite Elysian research project, AURA features the

Wharfedale AMT high-frequency transducer, glass fibre matrix midrange and bass cones, the SLPP port

system and multi-layer cabinets.

Wharfedale

AMT High

Frequency

Transducer

Unlike conventional dome or other ribbon and

planar diaphragms, the Wharfedale AMT

high-frequency transducer does not move

forwards and backwards like a piston. It is

therefore not constrained by the mass of its

diaphragm, with the attendant blurring of

transient response. Instead the diaphragm is

folded and carries conductive elements

immersed in an immensely strong magnetic

field. When the music signal from the

amplifier traverses the diaphragm, the folds

constrict and expand. This has the effect of

squeezing the air between the folds, rapidly

altering its pressure to accurately transmit the

equivalent pressure wave received by the

microphone(s) in the recording studio.

Cabinet

AMT

Mid Trim Ring

Bass Trim Ring

Front Plate

Spike Cap

Spike

Acoustic

Damping Frame

Terminal posts

Midrange

Wood Plinth

Port Tube

Metal Plinth

Woofer

ti-layer cabinets.

Cabi

Mid

m R

ass Trim Ri

e Cap

ike

Acoustic

mpin

Fram

erminal

ost

Midran

Woo

Plint

ort Tu

l Plint

Woo

Designer's Notes

Glass Fibre

Matrix cones

As Wharfedale engineers found when

designing the Elysian series, the transient

accuracy and efficiency of the AMT needs to be

matched by the midrange and bass drivers for

a seamless audio performance. Accordingly,

AURA also uses a proprietary woven

glass-fibre matrix diaphragm for the midrange

and bass cones terminated by high flexibility

rubber surrounds. The voice coils driving the

cones are immersed in high-flux magnetic

fields, with eddy currents and inductance

controlled by Copper-clad pole pieces.

These low-distortion motor systems are mounted on die-cast aluminium chassis,

each fixed to the cabinet by six high-tensile bolts to maintain the rigidity of

structure and provide accurate transient response. The rubber trim rings

surrounding each chassis are not just a cosmetic feature but also control any

resonance occurring at the junction of the aluminium chassis and wood cabinet.

The AMT diaphragm is also operating over a large area, for advanced efficiency,

and is able to generate transient acoustic power quite easily. Wharfedale’s design

team have improved the AMT unit in AURA loudspeakers to extend the response to

36kHz (-6dB) allowing a smooth and linear response to 22kHz (+-3dB). The

result is exceptional clarity of treble detail allied to realistic transient response,

smoothly enhancing the harmonic overtones of voices and instruments whilst

providing shimmering realism to percussion such as cymbals.

prov

Designer's Notes

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Design

Wharfedale’s SLPP (Slot Loaded Profiled Port) bass reflex design was developed

from an original idea of Gilbert Briggs, the entrepreneur who set up and ran

Wharfedale from 1932 to 1964. In AURA loudspeakers, the high-pressure,

high-velocity airflow from a downward-facing port is better matched to the low air

pressure in the room by distributing the airflow through a series of slot ports in the

plinth. This both reduces unwanted turbulence from the port and also improves the

efficiency of the bass reflex system.

Underneath the polished lacquers lie cabinet walls built from multiple layers of

differing woods designed to reduce panel resonance below audibility. This

multi-layer construction, PROS (Panel Resonance Optimization System) has a

further benefit - it inhibits the leakage of unwanted sound energy from inside the

cabinet which would otherwise interfere with the forward output of the drive units.

Already, much of this internal sound energy is absorbed by multiple layers of

matted long hair fibre - its damping factor specifically calculated to avoid rear

reflection back out through the drive unit cones whilst still allowing unrestricted

airflow to the SLPP reflex port system.

Multi-layer

lacquered

cabinet

AURA cabinets are, in many ways, a work of

art. Available in Black, White and a feature

grained Walnut real wood veneer, each cabinet

is lacquered and polished to present a beautiful

piece of furniture you will be proud to have in

your home. The smooth curves to the cabinet are

more than just eye catching. They help to

disperse the acoustic output of the drive units

smoothly into the room without undesirable

reflections from otherwise sharp edges.

Designer's Notes

In conjunction with the low resonance of the bass units, the SLPP system provides

bass extension to well down into and below the 30Hz region for AURA 2, 3 and 4,

revealing the fundamentals of most musical instruments with excellent

articulation, clarity and power. You can feel as well as hear the true acoustic power

of the musical performance.

In fact this crossover fine-tuning can take

hundreds of hours of listening and testing in

order not only to provide a seamless blend but

also to balance the fundamental and

harmonic overtones of voices and instruments

so that they sound stunningly realistic when

replayed in the home. The result is that, when

you close your eyes, the AURA speakers seem

to disappear and you are simply enfolded in

the musical experience.

AURA

Crossover

In many ways the crossover is the ‘heart’ of every loudspeaker. Wharfedale were one

of the first domestic speaker manufacturers to utilise a crossover to divide the

frequency band between drive units that were optimised for bass, midrange and

treble.

But today’s crossovers have to do more than just divide up the musical input to the

loudspeaker and distribute it to the relevant drive units. The crossover also has to be

matched accurately to the acoustic performance of each drive unit to achieve a blend

between the drivers that is acoustically seamless. Although this process is aided by

the sophisticated computer analysis available from measurements made by

Wharfedale’s engineers, the fine-tuning has to be done by ear using a variety of

musical sources and styles.

In addition each crossover component has to be tested and evaluated for its acoustic

transparency. Bass and midrange/treble crossovers are laid out on separate PCBs

in order to reduce electromagnetic interference and coupled to their respective

terminals to allow bi-wiring if required.

ce and coupled to their respective

Designer's Notes

In 1979, Peter Comeau co-founded Heybrook Hi-Fi to design and manufacture the

multi-award-winning HB1 and classic HB2 loudspeakers. In 2009, after leading IAG

speaker development since the acquisition of Mission, Peter assumed overall

acoustic design responsibility for all of the brands within the Group, including

Wharfedale. With a deep respect for the history of these brands and the necessity to

maintain each individual brand’s design integrity, Peter continues to design

award-winning speakers at IAG’s research centres in Huntingdon, England, and

Shenzhen, China.

Huntingdon

England

and

Director of Acoustic Design

IAG Group Ltd.

PETER COMEAU

AURA CS

AURA C

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