Audio Note KAGEKI BALANCED Technisches Handbuch

KAGEKI BALANCED

MONO POWER AMPLIFIERS

OWNER’S INFORMATION

1) IMPORTANT SAFETY INFORMATION

2) CE DECLARATION OF CONFORMITY

DISPOSAL

POWER REQUIREMENTS

3) INTRODUCTION

4) OVERVIEW

UNPACKING AND INSTALLATION

5) VALVE INSTALLATION

6) CONNECTION

7) OPERATION

8) TECHNICAL SPECIFICATIONS

9) WARRANTY INFORMATION

10) CONTACT INFORMATION

CONTENTS

CH 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

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) KAGEKI BALANCED

mono power amplifiers.

They are Pure Class A Parallel Single Ended valve amplifiers that use a pair of the

highly regarded and wonderful sounding 2A3 triode valves per channel, producing a

level of performance that is radically superior to the vast majority of current designs.

They have been specifically engineered for sonic performance rather than technical

specification, and fulfill all Audio Note (UK) Level 5 criteria: -

Pure Class A operation

Zero Negative Feedback

Single Ended Output Stage

Valve Rectification

Directly Heated Triode operation

Finest materials and component quality

Each amplifier is completely hand assembled, and uses only the finest possible

materials and components: -

Audio Note (UK) customer Output Transformers, using AN (UK) Silver windings and

AN-Perma 50% Nickel Double C core

Audio Note (UK) custom 2 Watt Tantalum resistors

Audio Note (UK) 2 Watt Tantalum Non Magnetic resistors

Audio Note (UK) Silver Foil capacitors

Audio Note (UK) Silver internal wiring

Black Gate™capacitors in critical areas

KAGEKI BALANCED

Please take care when unpacking your KAGEKI BALANCED amplifiers. Choose a

clean, clear location to unpack them, and be aware that the amplifiers are very

heavy; before attempting to unpack or lift the units, check the weight and if necessary

use more than one person so that they 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 amplifiers. 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 supporting the weight of the units.

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 amplifiers is provided, and that airflow

through any ventilation slots in the casework is not restricted. We recommend a

distance of at least 50cm free space is maintained above the amplifiers, and

preferably they should be sited in free space or on the top shelf of your equipment

rack or table. Please also remember that valve equipment operates at extremely high

temperatures, so a position that is inaccessible to any children or animals is

essential.

UNPACKING AND INSTALLATION

The amplifiers are shipped without their valve compliment installed. It is necessary to

install the valves before operation.

It is essential that the valves are installed correctly or serious damage that is not

covered by the warranty will result. We recommend that your dealer perform

this procedure for you if you are in any way unsure.

FIRSTLY, ENSURE THAT THE AMPLIFIERS ARE NOT CONNECTED TO A

MAINS ELECTRICAL SUPPLY, AND THAT THE POWER CORDS ARE NOT

CONNECTED TO THE AMPLIFIER.

Now remove the valves that are packed inside the shipping carton and carefully

unwrap them. Also inspect the amplifiers to check that nothing has become damaged

or dislodged during transit.

You should find the following valves: -

2 x VT25 / 10Y input stage valves

4 x 2A3 new old stock output valves

2 x 5R4GY rectifier valves

Once again, please understand that it is absolutely vital these valves are fitted

correctly.

There are three different types of valve used in the KAGEKI Balanced amplifier, the

rectifier, a 5R4GY, the two output valves, 300B and the input/driver valve, the VT25,

also known as the 10 and 10Y.

The 2A3 and VT25 use the UX4 valve base, which has four pins. It has two large

diameter pins, and two smaller, and it is extremely important to ensure that, when

inserting the valves, that the correct pins line up with those in the valve base.

Check twice, three times, and make sure you insert the valves the right way.

The AN UX4 valve bases use a copper alloy for the contacts, which means it’s

possible to bend them on insertion unless a little care is taken.

The 5R4GY is an Octal based valve. It has 8 pins plus a locating spigot with a key to

ensure correct alignment. When inserting the valve, ensure that the key is aligned

with the key seat on the base. It is possible to break off the spigot if the valve is

treated roughly.

The correct way to seat a valve is to ensure that it is dead vertical when inserting it

into the socket, to use a firm pressure, and a small (<1mm at the top of the valve)

amount of rocking to get the pins to engage the contacts.

If you are unsure about fitting the valves, get your dealer or a technician to do it for

you, to fit the valves incorrectly risks damage to a very expensive piece of

equipment.

Check one more time that all of the 8 valves are correctly fitted

VALVE INSTALLATION

Line inputs The KAGEKI Balanced is a mono, transformer-balanced-input

amplifier, and has a single XLR input wired according to the accepted

pro standard of 1 - GND, 2 - HOT, 3 COLD.

Speakers Each amplifier has three speaker terminals; a common, 0, a 4 ohm

nominal terminal and an 8 ohm nominal terminal.

Most common speakers would be connected to the 8 ohm terminal

(and 0), and will sound best in that position, but there is no harm in

trying both 4 and 8 ohms.

Unless the speaker is a very low impedance model, the 8 ohm tap will

usually sound more open and dynamic.

Mains Each KAGEKI BALANCED is equipped with an IEC 320 mains inlet

socket for each amplifier. Use the supplied mains cables to connect

the units to the local mains supply. The mains fuse and a spare are

located in the inlet socket fuse drawer.

Special Note –Make sure that all connections are 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

of your preamplifier / source is at the minimum setting.

Turn on all components in the signal chain BEFORE the KAGEKI BALANCED; they

should always be the LAST components to be switched ON, and the FIRST to be

switched OFF.

Turn on the amplifiers by using the rocker switch located on the rear top left of the

back panels, just above mains inlet socket.

Bedding in The new amplifiers requires about 100 hours of initial use

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

optimum performance is realized.

As the amplifiers “bed in” the sound will become increasingly

smoother, detailed and open.

Once the amplifiers have “bedded in” a warm up time of

approximately 30 to 45 minutes is required each time the

amplifiers are switched on before optimum sonic performance

is reached.

Cleaning No special maintenance is required for the amplifiers. 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 amplifiers.

ENSURE THAT THE AMPLIFIERS ARE SWITCHED OFF

AND DISCONNECTED FROM THE MAINS ELECTRICITY

SUPPLY BEFORE UNDERTAKING ANY CLEANING.

Valve Life The valves supplied with your amplifiers should provide

approximately 6000 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

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