Audio Note P1 Technical manual

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P1
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STEREO POWER AMPLIFIER
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OWNERʼS INFORMATION
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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
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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.
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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.
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This product must be earthed –ensure that the mains supply cable earth /
ground is correctly connected.
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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.
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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.
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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: [phone]
Fax: [phone]
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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: [phone]
Fax: [phone]
e-mail: [email protected]o.uk
INTRODUCTION

Congratulations on your purchase of the Audio Note (UK) P1 stereo power amplifier.
It is a Pure Class A, Push-Pull valve design, producing 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.
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 P1 stereo power amplifier. Choose a clean,
clear location to unpack your unit. Be aware that the 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 30cm free space is maintained above the unit, and preferably it 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.
P1 STEREO POWER AMPLIFIER
UNPACKING AND INSTALLATION

Line inputs Being a stereo power amplifier, the P1 is fitted with one pair of single
ended / RCA inputs. Looking from behind the amplifier, they are
located at bottom / right hand side of the rear panel. The Black socket
is for the Left channel, the Red socket is for the Right channel.
Connect the output from your preamplifier to these inputs.
Speakers Each channel is equipped with 3 colour coded binding posts for
connection to your speakers, located on the rear panel.
Looking from the front of the amplifier, the 3 binding posts on the left
are for the LEFT channel and the 3 binding posts on the right are for
the RIGHT channel. Additionally, each set of binding posts is marked
ʻLEFTʼand ʻRIGHTʼ.
Connect the amplifierʼs black speaker output binding post marked as
“0” to the black / negative terminal (also marked “ –“) on the speaker.
Connect the amplifierʼs 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.
Ground Post A ground post is provided for connection to those source components
that also use a separate ground terminal.
Mains The P1 employs 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 are 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
of your preamplifier / source is at the minimum setting.
Turn on all components in the signal chain BEFORE the P1; it should always be the
LAST component to be switched ON, and the FIRST to be switched OFF.
Turn on the amplifier by using the rotary switch located on the right of the front panel.
The red front panel light should now be lit. The amplifier requires approximately 45
seconds to initialize before it is ready for operation.
Volume Control Unlike most Stereo power amplifiers, the P1 is equipped with a
volume control. When in use with a preamplifier, set the P1
volume control so that the preamplifierʼs volume control is
operating in its optimum range, usually between the 9 oʼclock
and 3 oʼclock positions. This will usually result in the P1ʼs
volume control being set at roughly the 12 oʼclock position.
When using the P1 with a line level source, use the volume
control to set the desired listening level.
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 4000 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

INPUT IMPEDANCE
100 KOhm Line Level
INPUT SENSITIVITY
350mV for full output
MAXIMUM OUTPUT
20 watts RMS per channel into 4 or 8 Ohm loads
CHANNEL BALANCE
+/-0.3dB
TUBE COMPLIMENT
4 x ECC83
4 x EL84
FUSE RATINGS
2A anti-surge (110 / 120V supply)
1.2A anti-surge (220 / 240V supply)
MAX. POWER CONSUMPTION
100 Watts
UNIT WEIGHT
17 KG
SHIPPING WEIGHT
(ORIGINAL PACKAGING)
20 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)ʼs ongoing research and
development program, specifications are subject
to change without notice.
TECHNICAL SPECIFICATIONS

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 cover 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

Audio Note (UK) Limited
25 Montefiore Road
Hove
East Sussex
BN3 1RD
United Kingdom
Tel: [phone]
Fax: [phone]
e-mail: [email protected]o.uk
CONTACT INFORMATION
If in the future your Audio Note (UK) product
requires servicing, or if you require technical support
or have any questions regarding this or any of our
other products, please contact your local Audio Note
(UK) dealer.
Alternatively, please feel free to contact us directly: -!