Audio Note I Zero Manuale di istruzioni

I Zero

INTEGRATED AMPLIFIER

OWNER’S INFORMATION

1) IMPORTANT SAFETY INFORMATION

2) CE DECLARATION OF CONFORMITY

DISPOSAL

POWER REQUIREMENTS

3) INTRODUCTION

4) OVERVIEW

5) UNPACKING AND INSTALLATION

6) CONNECTION

7) OPERATION

8) TECHNICAL SPECIFICATIONS

9) WARRANTY INFORMATION

10) CONTACT INFORMATION

CONTENTS

OTHER SAFETY PRECAUTIONS: -

Never touch the power cord with wet hands.

Always remove the power cord by grasping the plug, not the cable.

Never expose the unit to excessive heat or magnetism.

Never let an inexperienced person repair or reassemble the unit.

Never put anything, especially metal objects, inside the unit.

Never place excessive weight on the unit.

Do not store or operate this unit in areas of high humidity or in close

proximity to water / moisture.

Do not expose or immerse the unit in liquid of any kind.

This product generates high levels of heat. Adequate ventilation must

be provided. Do not restrict airflow through any ventilation slots or

place the unit on any surface that may restrict airflow.

Valve equipment operates at extremely high temperatures;

KEEP OUT OF THE REACH OF CHILDREN AND ANIMALS.!

RISK OF SHOCK OR ELECTROCUTION! INTERNAL OPERATING

VOLTAGES ARE LETHAL!

Do not remove top cover, unless specifically instructed to do so in the user

manual.

This unit contains fuses and other safety components in accordance with

BS60065 requirements.

In the event of failure, replacement fuse or safety component must be of

the same part type and value.

This product must be earthed –ensure that the mains supply cable earth /

ground is correctly connected.

SUCH REPLACEMENT MUST ONLY BE CARRIED OUT BY A

QUALIFIED SERVICE TECHNICIAN.

Do not attempt to replace any fuses without first disconnecting the unit

from the mains electricity supply.

! IMPORTANT SAFETY INFORMATION !

POWER REQUIREMENTS

Power requirements for electrical equipment vary depending on your geographical

location. Please ensure that your unit meets the power requirements in your area.

The power requirement for your unit is marked on the serial number plate, located on

the rear panel.

If you are in doubt, please contact your dealer before plugging the unit into the mains

supply.

CE DECLARATION OF CONFORMITY

DISPOSAL

This product must not be disposed of as normal household waste. To

prevent possible harm to the environment please separate the product

from other waste to ensure that it can be recycled in an environmentally

safe manner. Please contact your retailer or the appropriate local

government office for collection facilities.

We declare under our sole responsibility that this product is in conformity

with the following standards or standardized documents:

BS EN 60065 in accordance with the regulations 73/23/EEC, 89/336/EEC

(from 1 January 1997)

CE 94

Peter Qvortrup,

Director

Audio Note (UK) Limited

Viscount House

Star Road, Star Trading Estate

Partridge Green

West Sussex

RH13 8RA

United Kingdom

Tel: +44 (0)1273 830 800

Fax: +44 (0)1273 731 498

Thank you for purchasing this Audio Note (UK) product. With the correct care it

should give you many years of pleasure and enjoyment.

Please take the time to read all of the information in this manual before connecting

your new component to an electrical supply or your system, to ensure both your

safety and satisfaction.

Please note that due to our desire to continually improve products, specifications are

subject to change without notice. Therefore it is important to refer to the manual that

is supplied with your product for the most accurate information; manuals downloaded

from our website or obtained from other sources may no longer fully apply to your

product.

If you have any questions regarding the information contained within this document

or your new component, please feel free to contact us: -

Audio Note (UK) Limited

Viscount House

Star Road, Star Trading Estate

Partridge Green

West Sussex

RH13 8RA

United Kingdom

Tel: +44 (0)1273 830 800

Fax: +44 (0)1273 731 498

e-mail: info@audionote.co.uk

INTRODUCTION

Congratulations on your purchase of the Audio Note (UK) I Zero Integrated Amplifier.

Please read this manual carefully in order to obtain the best possible performance

and longevity from your new amplifier.

The I Zero is a stereo push / pull line level integrated amplifier with an output power

rated at around 8 watts. It has been specifically engineered for sonic performance

rather than technical specification, and fulfills all Audio Note (UK) Level Zero criteria:

Valve output stage

Class A weighted operation (switching to class AB at high output)

Materials and component quality

It is well known that the accurate reproduction of music, not just sound, requires the

purity of the incoming signal to be preserved. It is therefore not difficult to conclude

that, in order to achieve this goal and to retain the musicality of the original

performance,the complexity of the circuitry itself must be kept to a minimum.

In contrast to the majority of the audio industry, we design our circuits with the aim of

minimising non-harmonic and time base anomalies, rather than producing

vanishingly small harmonic or low intermodulation distortion measurements. These

non-harmonic amplitude and time base distortions have a highly perceptible and

adverse affect on the signal waveform, and it is far more important to address these

factors than participate in the increasingly irrelevant numbers game that chases

‘perfect measured response’.

As a result, the I Zero has been designed for maximum linearity and minimum

transient distortion, within the capabilities of its cost effective and compact design.

We chose to use a pair of the now rarely seen triode / pentode ECL82 valves for the

output stage in push / pull configuration. This marvellous small envelope design was

widely used in radios and early televisions as an output valve, and is run in Class A

until 80% of its rated power. After this, when the amplifier is operating at high power /

close to its maximum possible output, the I Zero switches to class AB which provides

low-heat, reliable and long life.

Audio Note (UK) copper wiring, high quality film resistors and metalized Mylar film

signal capacitors are used in key areas of the circuit, along with in-house designed

and manufactured, custom Audio Note (UK) output transformers with copper

primaries and secondaries. Our own high quality connectors, switch gear / volume

control and trimmings are also included.

I ZERO INTEGRATED AMPLIFIER

Please take care when unpacking your I Zero Integrated Amplifier. Choose a clean,

clear location to unpack your unit. Be aware that the amplifier is heavier than its

diminutive size would suggest; before attempting to unpack or lift the unit, check the

weight and if necessary use more than one person so that it can be moved safely

and easily.

We recommend that you retain and carefully store all of the original packing

materials, in case transportation / shipping is required at a later date.

Select a suitable location for the unit. This should be a dry, dust free and level area,

preferably shielded from direct sunlight and free from vibration. Also ensure that the

location is stable and capable of carrying the weight of the unit.

A suitable mains power outlet must be close to the location; power cords must not be

pulled or stretched tightly in an attempt to reach a wall socket. If the power cord will

not easily reach the socket, choose a closer location!

Please ensure that adequate ventilation for the unit is provided, and that airflow

through any ventilation slots in the unit is not restricted. We recommend a distance of

at least 20cm free space is maintained above the unit. Please also remember that

valve equipment operates at extremely high temperatures, so a position that is

inaccessible to children or animals is essential.

UNPACKING AND INSTALLATION

Line inputs Four RCA / Single Ended line inputs are available for connection,

labeled ‘CD’ ‘Aux 1’, ‘Aux 2’ and ‘Tuner’; all four inputs have the same

specifications and any standard ‘line level’ source can be connected to

these inputs.

All sockets are colour coded; RED is for RIGHT channel connection,

WHITE is for LEFT channel connection.

Speakers Each channel is equipped with 2 colour coded binding posts for

connection to your speakers. Looking from the REAR of the amplifier,

the 2 binding posts to the left are for the RIGHT channel and the 2

binding posts to the right are for the LEFT channel (see illustration on

page 5).

Connect the amplifiers BLACK speaker output binding post marked as

“ –“ to the BLACK / negative terminal (also marked “ –“) on the

corresponding speaker.

Connect the amplifiers RED speaker output binding post to the RED /

positive terminal (also marked “ + “) on the corresponding speaker.

Mains The I Zero is equipped with an IEC 320 mains inlet socket. Use the

supplied mains cable to connect the unit to the local mains supply.

Special Note –Make sure that all connectionsare tight and clean. For

best results use good quality audio interconnects. Although it is

perfectly acceptable to use cables manufactured by other companies,

for best results and performance, we recommend our own Audio Note

(UK) range of interconnects and loudspeaker cables. For further

information, please consult your nearest Audio Note (UK) dealer, or

alternatively please feel free to contact us directly.

CONNECTION

RCA SOCKET,

CENTRE = POSITIVE /

SEND.

RCA SOCKET,

SHELL = NEGATIVE /

RETURN.

OPERATION

Once all the connections are completed and checked, ensure that the volume control

is at the minimum setting (rotated all the way left).

Ensure that all source components connected to the I Zero are switched ON.

Source components should always be the FIRST components to be switched on and

the LAST components to be switched off.

The I Zero should be the LAST component to be switched on and the FIRST

component to be switched off.

The above procedure minimizes the possibility of loud noises produced by

components at switch on being passed to the loudspeakers and possibly causing

damage.

Turn on the I Zero by using the rocker switch located on the rear panel, above the

mains inlet IEC socket. The I Zero requires approximately 45 seconds to initialize

before it is ready for operation.

Input Selector Turn the selector to the source you wish to listen to.

Volume Control This control adjusts the listening level, or loudness. Set as

desired!

Bedding in The new amplifier requires about 100 hours of initial use (called

“bedding in”) before the circuitry becomes stable and optimum

performance is realized.

As the amplifier “beds in” the sound will become increasingly

smoother, more detailed and open.

Once the amplifier has “bedded in” a warm up time of

approximately 30 minutes is required each time the unit is

switched on before optimum sonic performance is reached.

Cleaning No special maintenance is required for the preamplifier. Use a

soft, clean lint free cloth to remove any surface marks from the

casework. For finger marks / grease, use a soft, clean lint free

cloth, lightly moistened with a solution of warm water and mild

detergent. Do not use any alcohol or solvent based cleaning

products, as they may damage the finish of the amplifier.

ENSURE THAT THE PREAMPLIFIER IS SWITCHED OFF

AND DISCONNECTED FROM THE MAINS ELECTRICITY

SUPPLY BEFORE UNDERTAKING ANY CLEANING.

Valve Life The valves supplied with your I Zero should provide

approximately 6000 hours of operation, although this is

dependent on the type of usage. They are specially selected

by us, and should only be replaced with valves of the same

type and specification. Please consult your Audio Note (UK)

dealer should your valves need replacing. Alternatively, feel

free to contact us directly.

TECHNICAL SPECIFICATIONS

INPUT IMPEDANCE

100 KOhms Line Level

INPUT SENSITIVITY

400mV for full Output

MAXIMUM OUTPUT

8 Watts RMS per channel into

4 or 8 ohm loads

CHANNEL BALANCE

+/-0.3dB

OUTPUT NOISE (RMS)

<0.08mV unweighted, Line Level

VALVE COMPLEMENT

4 x ECL82 Triode / Pentode valves

UNIT WEIGHT

7KG

UNIT DIMENSIONS

300mm (W) x 96mm (H) x 310mm (D)

MAINS INPUT

AC 100-120V/220-240V 50/60 Hz

MAINS FUSE

220/240V –800mA Anti Surge

100/120V –1.6A Anti Surge

MAX POWER CONSUMPTION

75W

NOTE

Due to Audio Note (UK)’s ongoing

research and development program,

specifications are subject to change

without notice.

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