Audio Note M1 RIAA Manuel technique

M1 Line

PRE AMPLIFIER

OWNER’S INFORMATION

1) IMPORTANT SAFETY INFORMATION

2) CE DECLARATION OF CONFORMITY

DISPOSAL

POWER REQUIREMENTS

3) INTRODUCTION

4) OVERVIEW

UNPACKING AND INSTALLATION

5) CONNECTION

6) 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

25 Montefiore Road

Hove

East Sussex

BN3 1RD

United Kingdom

Tel: +44 (0)1273 220 511

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

25 Montefiore Road

Hove

East Sussex

BN3 1RD

United Kingdom

Tel: +44 (0)1273 220 511

Fax: +44 (0)1273 731 498

e-mail: [email protected]o.uk

INTRODUCTION

Congratulations on your purchase of the Audio Note (UK) M1 Line Pre Amplifier.

It is a pure Class A, Zero Negative Feedback design, employing a single ECC82 dual

triode valve.

It has been specifically engineered for sonic performance rather than technical

specification, and offers an outstanding level of performance and value.

It fulfills all Audio Note (UK) Level 1 criteria: -

Pure Class A operation

Zero negative feedback

Materials and component quality

Please take care when unpacking your M1 Line Pre Amplifier. Choose a clean, clear

location to unpack your unit. Be aware that the Pre Amplifier is quite heavy; 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.

M1 LINE PRE AMPLIFIER

UNPACKING AND INSTALLATION

Line inputs Four line inputs are available labeled CD1, CD2, Tuner and Aux. Any

standard ‘line level’ source can be connected to these inputs.

Connect the ‘Rec-Out’ or ‘Line Out’ sockets on your recording device

to the ‘Tape In’sockets of the M1 Line, and the ‘Tape Out’ sockets to

the ‘Rec-In’ or ‘Line In’ sockets of your recording device.

Ground Post A ground post is provided for connection to those source components

that also use a separate ground terminal.

Mains The M1 Line Pre Amplifier uses an IEC 320 mains inlet socket. Use

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

The mains fuse and a spare is located in the inlet socket fuse drawer.

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.

Outputs The M1 Line provides two RCA / Single Ended outputs, consisting of

two pairs of colour coded RCA / Single Ended sockets. RED is for

RIGHT channel connection, WHITE is for LEFT channel connection.

RCA The two pairs of RCA / Single Ended outputs are for connection to a

power amplifier and are identical, making them suitable for bi-amping.

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 M1 Line Pre Amplifier are

switched ON. Source components should always be the FIRST components to be

switched on and the LAST components to be switched off.

Ensure that all power amplifiers connected to the M1 Line Pre Amplifier are

switched OFF. Any power amplifiers in use should be the LAST components to be

switched on, and the FIRST components 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 M1 Line Pre Amplifier by using the rocker switch located on the rear

panel, above the mains inlet IEC socket.

The M1 Line Pre Amplifier 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.

Source / Tape This allows you to switch between the selected source input

and the output of your recording device.

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

desired!

Balance Control This control adjusts the relative left/right levels. Use this control

if necessary to equalize the loudness from each speaker.

Feedback

Switches Two feedback switches are located next to the ground terminal

on the rear panel; these are used for matching the output of the

M2 Line to the input of the following power amplifier.

Set the switches to the ‘on’ position if any of the following

apply: -

The volume control is too sensitive, and output is too high.

If the interconnects between the M1 Line and the following

power amplifier are longer than 3 meters.

If the power amplifier has an input impedance of less than

50KOhms.

When in doubt, choose the setting that provides the best sonic

performance.

NOTE: Always turn the power off before adjusting the feedback switches. Ensure

that both feedback switches are in the same position.

Bedding in The new pre amplifier requires about 200 hours of initial use

(called “bedding in”) before the circuitry becomes stable and

optimum performance is realized.

As the Pre Amplifier “beds in” the sound will become

increasingly smoother, detailed and open.

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

approximately 30 to 45 minutes is required each time the

amplifier is switched on before optimum sonic performance is

reached.

Cleaning No special maintenance is required for the M1 Line. 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 Pre Amplifier.

ENSURE THAT THE M1 LINE IS SWITCHED OFF AND

DISCONNECTED FROM THE MAINS ELECTRICITY

SUPPLY BEFORE UNDERTAKING ANY CLEANING.

Valve Life The valve supplied with your M1 Line Pre Amplifier should

provide approximately 5 years of operation. 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.

OPERATION continued…

TECHNICAL SPECIFICATIONS

INPUT IMPEDANCE

100 KOhm Line

INPUT SENSITIVITY

75mV for 1V Output Feedback Off

150mV for 1V Output Feedback On

OUTPUT IMPEDANCE

5KOhm Feedback Off

2.5KOhm Feedback On

OUTPUT NOISE (unweighted RMS)

<0.7mV Line (Feedback Off)

TUBE COMPLIMENT

1 x ECC82

FUSE RATINGS

1A anti-surge (110 / 120V supply)

500mA anti-surge (220 / 240V supply)

MAX. POWER CONSUMPTION

50 Watts

UNIT WEIGHT

7 KG

SHIPPING WEIGHT

(ORIGINAL PACKAGING)

10 KG

UNIT DIMENSIONS

140mm (h) x 295mm (w) x 450mm (d)

SHIPPING DIMENSIONS

(ORIGINAL PACKAGING)

240mm (h) x 400mm (w) x 550mm (d)

NOTE

Due to Audio Note (UK)’s ongoing research and

development program, specifications are subject

to change without notice.

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