Linn LK240 User manual
SINGLE SPEAKER POWER AMPLIFIER
OWNERS MANUAL
LINN LK240
!
i
Important safety information
Explanation of symbols used in this manual and on the product:
This symbol is intended to alert the user to the presence of
uninsulated dangerous voltages within the enclosure of sufficient
magnitude to cause electric shock.
This symbol is intended to alert the user to the presence of
important maintenance and servicing information in the instruction
and service manuals.
CAUTION
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE THE
COVER.
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING: SHOCK HAZARD. DO NOT OPEN.
AVIS: RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.
CAUTION: REPLACE FUSE WITH SAME TYPE AND RATING.
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE.
DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE.
ATTENTION: DEBRANCHER AVANT DE REMPLACER LE FUSIBLE.
WARNING
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
MAINS PLUGS
This appliance is supplied with a non-rewireable mains plug for the
intended country.
Replacement mains leads can be obtained from your Linn retailer.
Should you need to change the plug please dispose of it carefully.
A plug with bared conductors is dangerous if engaged in a live socket.
The Brown wire must be connected to the Live (Line) supply pin.
The Blue wire must be connected to the Neutral supply pin.
The Green/Yellow wire must be connected to the Earth (Ground) supply
pin.
Please contact your retailer or a competent electrician if you are in any
doubt.
ii
GENERAL SAFETY INSTRUCTIONS
1. Read instructions. Read the safety and operating instructions before
operating the appliance.
2. Retain instructions. Retain the safety and operating instructions for future
reference.
3. Heed warnings. Observe all warnings on the appliance and in the operating
instructions.
4. Follow instructions. Follow all operating and use instructions.
5. Water and moisture. Do not use the appliance near water, for example near
a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near
a swimming pool and the like.
6. Carts and stands. Use only with a cart or stand that is recommended by the
manufacturer.
6a. An appliance and cart combination should be used with care. Quick stops,
excessive force, and uneven surfaces may cause the appliance and cart
combination to overturn.
7. Wall or ceiling mounting. Mount to a wall or ceiling only as recommended
by the manufacturer.
8. Ventilation. Site the appliance so that its location or position does not
interfere with its proper ventilation. For example, the appliance should not
be situated on a bed, sofa, rug, or similar surface that may block the
ventilation openings, or placed in a built-in installation such as a bookcase
or cabinet that may impede the flow of air through the ventilation
openings.
9. Heat. Site the appliance away from heat sources such as radiators, heaters,
stoves, or other appliances (including amplifiers) that produce heat.
10. Power sources. Connect the appliance to a power supply only of the type
described in the operating instructions or marked on the appliance.
11. Grounding or polarization. Do not defeat the precautions taken to ground
or polarise the supply to the appliance.
12. Power cord protection. Route power cords so that they are not likely to be
walked on or pinched by items placed upon or against them, paying
particular attention to cords at plugs, power sockets, and at the point
where they exit from the appliance.
13. Protective attachment plug. As a safety feature the product is equipped
with an attachment plug containing overload protection. See the
instruction manual about resetting or replacing the plug. Should the plug
need replacing ensure that a replacement is used which has the same
overload protection as the original.
14. Cleaning. The product should be cleaned only as recommended by the
manufacturer.
15. Power lines. An outdoor antenna should be located away from power lines.
16. Outdoor antenna grounding. If an outdoor antenna is connected to the
tuner/receiver ensure that the antenna system is grounded to provide
some protection against voltage surges and static build up.
In the USA see article 810 of the National Electrical Code ANSI/NFPA 70
concerning installation requirements.
17. Non-use periods. Unplug the power cord from the outlet if the product will
be unused for a long period of time.
iii
18. Objects and liquid entry. Take care not to let objects or liquids fall into the
product.
19. Damage requiring service. The product should be serviced by qualified
personnel if:
a) The power cord or plug has been damaged.
b) Objects or liquid have fallen into the product.
c) The product has been exposed to rain.
d) The product does not appear to operate normally or exhibits a marked
change in operation.
e) The product has been dropped or the enclosure damaged.
20. Servicing. Don’t attempt to service the product beyond that described in
the operating instructions. All other servicing should be referred to qualified
service personnel.
UK USERS PLEASE READ THIS IMPORTANT SAFETY INFORMATION
Fuse replacement
This appliance is fitted with a non-wireable 13 Amp mains plug. The plug
contains a 5 Amp fuse. If the fuse has blown it can be replaced as follows:
a) Pull out the red fuse cover/carrier.
b) Remove and dispose of the blown fuse.
c) Fit a new 5 Amp BS1362 approved fuse into the carrier and push the
carrier back into the plug.
Always ensure the fuse cover is fitted. If the fuse cover is missing do not use
the plug. Contact your Linn retailer to obtain a replacement fuse cover.
Fuses are for fire protection and do not protect against electric shock.
Mains plug replacement
Should your mains plug need replacing and you are competent to do this
proceed as follows. If you are in doubt contact your Linn retailer or a
competent electrician.
a) Disconnect the plug from the mains supply.
b) Cut off the plug and dispose of it safely. A plug with bared conductors is
dangerous if engaged in a live socket.
c) Only fit a 13 Amp BS1363A approved plug with a 5 Amp fuse.
d) The cable wire colours or a letter will be marked at the connection points
of most quality plugs.
Attach the wires securely to their respective points. The Brown wire must
go to the Live pin, the Blue wire must go the Neutral pin, and the Green/
Yellow wire must go to the Earth pin.
e) Before replacing the plug top ensure that the cable restraint is holding
the outer sheath of the cable firmly and that the wires are correctly
connected.
WARNING
THIS APPLIANCE MUST BE EARTHED.
iv
Copyright and acknowledgements
Copyright © Linn Products Limited.
Linn Products Limited, Floors Road, Waterfoot, Glasgow, G76 0EP,
Scotland, United Kingdom.
All rights reserved. No part of this publication may be reproduced,
stored in a retrieval system, or transmitted, in any form or by any
means, electronic, mechanical, photocopying, recording, or
otherwise, without the prior written permission of the publisher.
Printed in the United Kingdom.
LK240 is a trademark of Linn Products Limited.
The information in this manual is furnished for informational use
only, is subject to change without notice, and should not be
construed as a commitment by Linn Products Limited. Linn
Products Limited assumes no responsibility or liability for any errors
or inaccuracies that may appear in this manual.
Part no: PACK 141
This manual was produced by Human-Computer Interface Ltd,
Cambridge, England.
v
Contents
Introduction ........................................ 1
The LK240 and music ........................................ 2
Setting up the LK240 ........................................ 5
Unpacking ........................................ 5
Positioning ........................................ 7
Connecting ........................................ 8
Operation ........................................ 9
Protection ........................................ 10
Guarantee and service ........................................ 11
Technical information ........................................ 12
Specifications ........................................ 12
Index ........................................ 13
vi
1
Introduction
We believe that good music is not a luxury, but a necessity, and we
at Linn have dedicated the better part of two decades to making
sure that our customers are given the best possible experience of
the music they love. In other words, we take music seriously, which
is why we dedicate ourselves to building hi-fi which sets the highest
possible standards in bringing music to life within your home.
Listening to your new Linn hi-fi system should be the nearest you
can get to being at a superb live performance. By making the
LK240 Single Speaker Power Amplifier the building block of your
Linn hi-fi system, you bring that superb live performance into your
home. Once up and running the LK240 will bring you an unrivalled
listening experience that we know you’ll enjoy again and again.
To do that, you need to know exactly how to get the best out of
your LK240 and that is what this manual is all about. In the next few
pages you will find out everything you need to know about how to
set up the LK240, and how to use it to get the best possible
results.
We hope that you will spend a few minutes getting to know the
LK240 well, and will keep on experimenting and, above all,
enjoying it!
Listening to your new
Linn hi-fi should be the
nearest you can get to
being at a superb live
performance.
LinnLK240
2
LINN LK240
The LK240 and music
The LK240 single speaker power amplifier is a rugged high
output amplifier designed for ease of use and purity of
sound.
It is the ideal basis for a superb hi-fi system. You
can build exactly the system you want, using one
(or more) LK240 amplifiers for each channel, with
the advantage of complete isolation between
channels.
The LK240 comes in a durable compact case built to last, and
easy to stack on other Linn products. The LK240 has been
designed to automatically power up when it detects the presence
of an audio signal and power down into standby mode when there
is no signal. This enables it to be left on with minimum power
consumption. An indicator light on the front panel remains red
when the LK240 is in standby and green when it is powered up,
telling you at a glance the operational status of the LK240.
The LK240 comes with full protection against power overload and
overheating, automatically shutting down to prevent damage to
itself or other Linn equipment, and powering back up when it is
safe to do so.
The LK240 is direct-coupled and servo-controlled to produce the
clearest sound and the toroidal transformer is fully shielded to
prevent hum when the LK240 is stacked with other products.
3
The LK240 provides two input sockets to make it easy to daisy
chain multi-amplifier systems, allowing you to boost the output
power of your system, or take advantage or bi-amping and
tri-amping.
Loudspeakers can be bi-wired, or tri-wired to the LK240 by the use
of the four loudspeaker sockets to obtain even higher sound
quality. Bi-wiring and tri-wiring involves making separate
connections to the treble and midrange/bass units on a
loudspeaker. Keeping the bass, midrange, and treble signals
separate improves the performance of the loudspeakers by
reducing the coupling between the signals.
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1
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