Audio Note M2 RIAA Technisches Handbuch

M2 RIAA

PHONO STAGE

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

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) M2 RIAA phono stage.

It has been specifically engineered for sonic performance rather than technical

specification, and fulfills all Audio Note (UK) Level 2 criteria: -

Pure Class A operation

Zero negative feedback

Single Ended circuit topology

Valve rectification

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 response to this, the M2 RIAA phono stage uses a single-ended, zero feedback

circuit topology. This is simply the most linear design possible, demanding pure

Class A valve operation and removing the need for a phase splitter, which introduces

unnecessary crossover distortion.

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 M2 RIAA phono stage was designed for maximum linearity and

minimum transient distortion, and avoids the need for detrimental ‘corrective’

measures, such as inherently error-prone feedback loops.

The M2 RIAA phono stage features an ECC83 and 6DJ8 Moving Magnet phono

stage, and a valve rectified power supply incorporating a 6X5 and an ECL82.

M2 RIAA PHONO STAGE

Please take care when unpacking your M2 RIAA phono stage. 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.

UNPACKING AND INSTALLATION

Phono input Connect the cables from your tonearm to the ‘Input’ sockets. The

inputs are colour coded; RED is for RIGHT channel connection,

WHITE is for LEFT channel connection. If your Turntable is equipped

with a separate earth wire, connect this to the dedicated grounding /

earth post, located in between the Right input socket and the Output

sockets.

If you wish to use a low output Moving Coil (MC) cartridge,

Audio Note (UK) manufactures a series of Step Up Transformers for

this purpose. For further information, please contact your Audio Note

(UK) Dealer, or alternatively please contact us directly.

Mains The M2 RIAA phono stage 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 M2 RIAA phono stage provides two unbalanced 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

on the following preamplifier or integrated amplifier is at the minimum setting (rotated

all the way left).

Ensure that power supply for the turntable connected to the M2 RIAA phono

stage is 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 pre and power amplifiers connected to the M2 RIAA phono

stage 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 M2 RIAA phono stage by using the rocker switch located on the rear

panel, above the mains inlet IEC socket.

Turn on your pre amplifier / power amplifier / integrated amplifier. If you are using a

pre / power combination, always turn on the pre amplifier BEFORE the power

amplifier(s).

The M2 RIAA phono stage is now ready for operation!

Bedding in The M2 RIAA phono stage requires around 100 hours of initial

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

and optimum performance is realized. As the device “beds in”

the sound will become increasingly more smooth, detailed and

open. A warm up time of approximately 30 minutes is required

each time the device is switched on before optimum sonic

performance is reached.

Cleaning No special maintenance is required for the M2 RIAA phono

stage. 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.

ENSURE THAT THE DEVICE IS SWITCHED OFF AND

DISCONNECTED FROM THE MAINS ELECTRICITY

SUPPLY BEFORE UNDERTAKING ANY CLEANING.

Valve Life The valves supplied with your M2 RIAA phono stage should

provide approximately 4 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.

TECHNICAL SPECIFICATIONS

INPUT IMPEDANCE

47 KOhms Phono

INPUT SENSITIVITY

126mV for 1V Output

OUTPUT IMPEDANCE

<10 Ohms

TUBE COMPLIMENT

1 x 6DJ8

1 x ECC83

1 x 6X5

1 x ECL82

FUSE RATINGS

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

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

MAX. POWER CONSUMPTION

55 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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