LK85/140 STEREO POWER AMPLIFIER OWNER'S MANUAL
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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.
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UK USERS PLEASE READ THIS IMPORTANT SAFETY INFORMATION Fuse replacement This appliance is fitted with a non-rewireable 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.
C E Declaration of C onformity Linn Products Ltd declare that this product is in conformance with the LowVoltage Directive 73/23/EEC and Electromagnetic Compatibility 89/336/EEC as amended by 92/31/EEC and 93/68/EEC.
Contents Introduction ........................................ 1 The LK85/140 and music ........................................ 2 Setting up the LK85/140 ........................................ 5 Unpacking ........................................ 5 Positioning ........................................ 6 Connecting ........................................ 7 Operation ........................................ 8 Protection ........................................ 9 Guarantee and service .......................
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. LK85 and LK140 are trademarks of Linn Products Limited.
L i n n L K 8 5 \ 1 4 0 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.
The LK85/140 and music The LK85 and LK140 are rugged high output amplifiers designed for ease of use and purity of sound. You can build exactly the system you want, using one or more LK85/140 amplifiers. The LK85 gives 85W per channel into 41, or 62W per channel into 81, and so is ideal for most average-sized NN LI rooms. Alternatively, additional power is available 140 LK from the LK140, which gives 140W per channel into 41, or 95W per channel into 81.
The LK85/140 is direct-coupled and servo-controlled to produce the clearest sound and the toroidal transformer is fully shielded to prevent hum when the amplifier is stacked with other products. The LK85/140 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.
For more performance, you can use two or three LK85/140s to bi-amp or tri-amp to the loudspeakers, each amplifier driving the bass, midrange, and treble signals separately. 4 When bi-amping or tri-amping the highest possible performance can be obtained by removing the passive crossover units from the loudspeaker and fitting active crossover modules to the LK85/140 to accurately divide the signal into the appropriate frequency bands. This is known as active playback.
Setting up the LK85/140 This chapter explains how to unpack your Linn LK85/140 Stereo Power Amplifier, and how to install it with your other hi-fi components. Unpacking Before connecting the LK85/140 to the mains supply, you should check the following: • that everything is in the box • that the correct voltage has been selected • that the correct fuse has been fitted.
Replacing the fuse To replace the fuse, first identify the correct fuse for your local voltage. This should be: • 3.15A anti-surge for 230V • 6.3A anti-surge for 115V • 6.3A anti-surge for 100V (Japanese version). Pull open the fuse drawer at the bottom of the mains inlet, insert the fuse in the rear compartment, and close the drawer. Earthing the LK85/140 The earthed moulded mains lead supplied must always be used with the LK85/140. Never use an unearthed plug or adaptor.
Connecting The following diagram shows the connections for the rear panel of the LK85/140: MAINS INPUT RIGHT SPEAKER OUTPUTS LINE LINE INPUTS OUTPUTS LEFT SPEAKER OUTPUTS SIGNAL DETECTOR SENSITIVITY VOLTAGE SELECTOR Connecting the mains supply Connect the LK85/140 to a mains supply using the mains cord supplied.
Connecting the speakers The LK85/140 comes equipped with two pairs of speaker output sockets to allow bi-wiring. Alternatively, auxiliary speakers may be connected. Operation To turn on the LK85/140 amplifier, press the power switch on the front panel. Signal detector sensitivity The LK85/140 uses signal sense circuitry to detect the presence of an audio input signal.
By-passing the signal detector Depending on its configuration, the LK85/140 will remain on standby for 10 or 20 minutes after an input signal has been removed. You can override this facility by fitting an internal link which forces the amplifier to remain on as long as the mains power is connected. Please consult your Linn retailer for further details. Protection Like all Linn products, the LK85/140 is a rugged amplifier, designed and built to withstand most eventualities.
Guarantee and service This product is guaranteed under the conditions which apply in the country of purchase. In addition to any statutory rights the customer may have, we undertake to replace any parts which have failed due to faulty manufacture. To help us, please ask your Linn retailer about the Linn warranty scheme in operation in your country. In the UK and other markets, extended warranty is offered to customers who register their purchase with Linn.
Technical information Specifications Output power 62W per channel into 81, 85W per channel into (230 Vac mains) 41 (LK85) 95W per channel into 81, 140W per channel into 41 (LK140) Input signal for 685mV rms (LK85) maximum output 870mV rms (LK140) Maximum output 18.5V rms (LK85) voltage 23.5V rms (LK140) Gain x27 (28.
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Index A L acknowledgements vi LK85/140 and music 2 active crossover modules 4 active playback 4 M audio input, connecting 7 mains plugs i mains supply, connecting 7 B bi-amping 4 O bi-wiring 3, 8 operation 8 overheating 6, 9 C overloading 6 connections 7 audio input 7 P mains supply 7 positioning 6 speakers 8 protection 2, 9 copyright vi F R replacing the fuse iii fuse ratings 6 fuse replacement iii, 6 G guarantee 10 S safety instructions i, ii service 10 setting up 5 signal detecto
T U technical information 11 unpacking 5 temperature, maximum 9 tri-amping 4 14
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LK85/140 STEREO POWER AMPLIFIER PACK 326/1
