Audio Note OTO Line Manuel technique

OTO Line

INTEGRATED AMPLIFIER

OWNERʼS INFORMATION

1) IMPORTANT SAFETY INFORMATION

2) CE DECLARATION OF CONFORMITY

DISPOSAL

POWER REQUIREMENTS

3) INTRODUCTION

4) OVERVIEW

UNPACKING AND INSTALLATION

5) CONNECTION

6) OPERATION

7) TECHNICAL SPECIFICATIONS

8) WARRANTY INFORMATION

9) CONTACT INFORMATION

CONTENTS

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 !

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 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.!

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

ground is correctly connected.

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.

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) OTO Line Integrated

Amplifier.

It is a Push Pull, Pure Class A valve design, offering an outstanding level of

performance and value.

It has been specifically engineered for sonic performance rather than technical

specification, and fulfills all Audio Note (UK) Level 1 criteria: -

Pure Class A Push-Pull Pentode operation

Materials and component quality

A high gain power amplifier stage is used consisting of an ECC83 dual triode acting

as an anode follower for the first stage, the output of which is applied to a second

anode follower which feeds the parallel connected EL84 output valves. This

arrangement allows for a passive line stage / volume control circuit to be

incorporated into the design.

The output transformers are custom designed and manufactured by Audio Note (UK),

and are of the highest possible quality.

The power supply is a multi element design, ensuring precise operation of each

circuit stage, whilst a DC supply feeds the low level valve filaments.

Please take care when unpacking your OTO Line Integrated Amplifier. Choose a

clean, clear location to unpack your unit. Be aware that the amplifier is very 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 any children or animals is essential.

OTO LINE INTEGRATED

UNPACKING AND INSTALLATION

Line inputs Four line inputs are available for connection, labeled CD1, CD2, Tuner

and Aux. Any standard ʻline levelʼsource can be connected to these

inputs.

Connect the ʻRec-Outʼor ʻLine Outʼsockets on your recording device

to the ʻTape Inʼsockets of the OTO, and the ʻTape Outʼsockets to the

ʻRec-Inʼor ʻLine Inʼsockets of your recording device.

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

that also use a separate ground terminal.

Speakers Each channel is equipped with 3 colour coded binding posts for

connection to your speakers.

Looking from the front of the amplifier, the 3 binding posts to the left

are for the left channel and the 3 binding posts to the right are for the

right channel.

Connect the amplifiers black speaker output binding post marked as

“0” to the black / negative terminal (also marked “ –“) on the speaker.

Connect the amplifiers red speaker output binding post marked “8

Ohm” to the red / positive terminal (also marked “ + “) on the speaker.

The other red speaker output binding post is marked “4 Ohm” and

may be used with 4 Ohm speakers. If you are uncertain whether your

speaker system is specified as 4 or 8 Ohm, try the following test once

all other connections are made and the amplifier is operational.

Compare the sound quality using a familiar recording with the

speakers connected to the 8 ohm connections and then the 4 Ohm

connections respectively. The selection that produces the best

frequency balance and maximum dynamics should be used.

Mains The OTO utilizes 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.

CONNECTION

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

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

Turn on the amplifier by using the rocker switch located on rear panel, above the IEC

mains inlet socket..

The red front panel light should now be lit. The 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.

Bedding in The new amplifier requires about 200 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, 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 amplifier. 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 AMPLIFIER IS SWITCHED OFF AND

DISCONNECTED FROM THE MAINS ELECTRICITY

SUPPLY BEFORE UNDERTAKING ANY CLEANING.

Valve Life The valves supplied with your amplifier should provide

approximately 8000 hours of operation. They are specially

selected by us, and should only be replaced with matched

pairs. Please consult your Audio Note (UK) dealer should your

valves need replacing.

OPERATION

TECHNICAL SPECIFICATIONS

INPUT IMPEDANCE

INPUT SENSITIVITY

MAXIMUM OUTPUT

CHANNEL BALANCE

VALVE COMPLIMENT

UNIT WEIGHT

SHIPPING WEIGHT

(ORIGINAL PACKAGING)

UNIT DIMENSIONS

SHIPPING DIMENSIONS

(ORIGINAL PACKAGING)

MAINS INPUT

MAINS FUSE

MAX. POWER

CONSUMPTION

NOTE

100k ohm, line level

300mV for full output

12 watts RMS per channel into 4 or 8 Ohm

loads

+/-0.3dB

2 x ECC82

2 x ECC83

4 x EL84

12 KG

14 KG

140mm (h) x 440mm (w) x 410mm (d)

220mm (h) x 550mm (w) x 520mm (d)

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

2A Anti Surge (110/120V Supply)

1.2A Anti Surge (200/240V Supply)

100 Watts

Due to Audio Note (UK)ʼs ongoing

research and development program,

specifications are subject to change

without notice.

Audio Note (UK) warrants this product to be free from defects in materials and

workmanship for two yearsfrom the original date of purchase from an appointed

Audio Note (UK) dealer, and agrees to covers the cost of parts and associated labour

required to correct such defects, subject to terms & conditions.

This Warranty is offered to the first purchaser only.

Any valves supplied with the unit are warranted for three months from the original

date of purchase.

If the product fails in normal domestic use and during the Warranty period due to the

above described faults or defects, Audio Note (UK) will,at its discretion, repair or

replace the item free of charge within a reasonable time once it has been returned to

Audio Note (UK) or an appointed Audio Note (UK) dealer or service engineer.

Audio Note (UK) is not liable for any shipping charges incurred whilst transporting the

product to or from Audio Note (UK) or an appointed Audio Note (UK) dealer or

service engineer, should the item require service or repair during or after the

Warranty period.

If the product must be shipped, please use the original packaging materials and

include a copy of the original sales receipt along with a note explaining, in as much

detail as possible, the problems you are experiencing with the unit.

Only use a reputable Courier Service or Shipping Agent, and ensure that your

product is insured during transit.

Any servicing, repairs or modificationsnot authorized by Audio Note (UK), or

carried out by persons other than appointed Audio Note (UK) service

engineers will invalidate any warranty.

This Warranty does NOT cover: -

Damage sustained whilst in the possession of a shipping agent, retailer or consumer

and not caused as a direct result of defects in materials or workmanship.

Damage caused by normal wear and tear.

Damage or defects caused by abnormal or unreasonable use.

Damage caused by accident, acts of nature, misuse or neglect.

Damage caused by a failure to follow the operating and installation instructions

supplied with the product.

Damage caused by improper or careless cleaning.

Audio Note (UK) reserves the right to refuse warranty for any component of which

the serial number has been removed, defaced or tampered with.

WARRANTY INFORMATION

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