Lindemann 855 User manual

855
Dual Mono Power Amplifi er
Owner’s Manual
ENGLISH

855 Dual Mono Power Amplifier
Important Safety Precautions
•Use only an approved power cable and plug or distribution board to connect your
amplifier to a power outlet. Do not use an extension cable.
•Never touch the mains plug if your hands are wet.
•Do not attempt to open the equipment. Refer servicing to qualified service
personnel. Touching live components inside the case can result in a fatal electrical
shock!
•Read the Owner's Manual and Safety Precautions before operating the equipment.
•Keep this Owner's Manual in a safe place so that you can refer to it later.
•Please heed all warnings on the equipment itself and in the Owner's Manual.
•Please follow the instructions contained in your Owner's manual and never use this
equipment for any purpose other than is explained in this Owner's Manual.
•Only connect this equipment to a power source of the type described in the
Owner's Manual and specified for this equipment.
•Make sure that there is adequate ventilation around the equipment to allow proper
cooling. Keep the equipment away from direct sunlight. Avoid installing the unit
close to sources of heat or in spaces such as bookshelves or cupboards where heat
radiation may be obstructed. Avoid excessive temperatures in the room, as these
could ultimately damage sensitive components and reduce the service life of your
amplifier.
•Never use the unit in damp rooms, at temperatures of below 15°C, or in the open
air. When bringing your amplifier in from the cold, allow it time to achieve room
temperature before plugging it in.
•Always switch the unit off before removing or inserting interconnects. Doing this
with the amplifier switched on can damage not only the unit itself but also
equipment connected to it.
•If you ever spill water or any other liquid onto the equipment, do not touch the
case! Remove the plug from the wall outlet and contact your dealer or our service
department.
•Never remove the earth pin from the plug. It is there to ensure your safety.
•Route the power cable so that no one can accidentally stand on it. Avoid locating it
under objects that might put pressure on the cable. Pay particular attention to
areas where the cable exits from plugs, AC outlets and from the unit itself.
•Never operate the unit without being present. Disconnect the plug from the wall
outlet and remove all aerial connections (including cable aerials) when: you clean
the unit, you do not expect to use the unit for long periods, during electrical
storms.
•If you have an external antenna or a cable antenna connected to your hi-fi system,
we recommend that you use a signal-isolating filter to avoid interference or
damage during thunderstorms.
•If you lose the sound while the amplifier is operating, or if you notice smoke or
burning, switch the unit off immediately and contact your dealer or our service
department.
•Only replace defective fuses after you have traced and removed the cause of the
fault and then only with a fuse of the same rating. Remove the mains plug before
changing fuses. Use an insulated screwdriver to remove and replace the fuse.
2

855 Dual Mono Power Amplifier
Dear Music Lover,
Congratulations on becoming the owner of the Lindemann 855 power amplifier.
This is an exclusive high-end audio component, built in Germany in limited
quantities.
Our team designed this amplifier to the highest standards so that you could
enjoy the highest level of audio reproduction. Because we use only the finest
components and the most modern production technologies, we confidently
guarantee that our products will retain their superb qualities for many years.
Keep the carton and packaging materials that your 855 came in. They will protect
your amplifier should you need to transport it in the future. Transporting the 855
in anything other than the original packaging may result in physical damage not
covered by your warranty.
A final note -- please take the time to read this Owner's Manual before using the
equipment for the first time. It contains a number of useful tips gathered from
our many years of experience, which will help you get the most from your hi-fi
system.
Copyright and trade mark acknowledgements
HiDRA, Lindemann audiotechnik, Lindemann high fidelity excellence and the
Lindemann logo are registered trade marks of Lindemann audiotechnik GmbH.
Lindemann audiotechnik GmbH disclaims any proprietary interest in trade
marks and trade names other than its own.
The information in this manual is furnished for information use only, is subject to
change without notice, and should not be construed as a commitment by
Lindemann audiotechnik GmbH. Lindemann audiotechnik GmbH assumes no
responsibility or liability for any errors or inaccuracies that may appear in this
manual.
Copyright and Acknowledgements
Copyright © 2007 Lindemann audiotechnik GmbH. 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.
3

855 Dual Mono Power Amplifier
Table of contents
Copyright and trade mark acknowledgements 3
Accessories supplied 4
Front view 6
Rear view 7
Setting up 9
Cooling 10
Protection circuits 10
Specification 11
CE declaration of conformity 12
Guarantee and Service 13
Directive on waste electrical and electronic equipment 14
Accessories supplied
•855 Dual Mono Power Amplifier
•Power cord, 2.0m
•SYSCOM connector cable, 1.0m
•Owner's Manual
We recommend that you keep the packaging for use when transporting the 855
in the future.
4

855 Dual Mono Power Amplifier
•Place your amplifier on a stable support. We recommend you use a solid hi-
fi rack. In our experience, you will achieve good results with racks fitted with
MDF shelves. Glass, metal or stone being less suitable for use as hi-fi
equipment supports. Never stack the 855 directly on other items of
equipment. 800-Series products are not suitable for installation in
enclosures such as 19" racks or cabinets. The on/off switch at the rear of the
unit must always be accessible.
•Take some time to organize your cabling. Try to keep power cables away
from interconnect and speaker cables. Shielded power cords can
significantly reduce the transfer of interference to your signal cables.
•Make sure that all system components are operated from one mains socket.
You can achieve this by connecting all system components through a
single, high quality mains distribution board. The lower the resistance
between signal sources and amplifiers, the less the audio signal will be
polluted and the better your hi-fi system will sound. Connecting your
components with the correct mains polarity is also important. Use a phase
finder to determine which pin is life. Mark the appropriate side of the power
outlet. The marked pin on the IEC power receptacle on the 855 should
connect to the positive conductor.
•Cleaning and maintenance. To clean your amplifier, use a soft cloth. To
remove stubborn dirt from the front panel, use a proprietary glass cleaner.
Do not use water! Never use solvents or white spirit. These will cause
irreparable damage to the surface of the unit.
5

855 Dual Mono Power Amplifier
Front view
1 2 3 4 5 6 7
855 DUAL MONO POWER AMPLIFIER
1. Fault LED, left (red)
2. Overtemperature LED, left (yellow)
3. On LED, left (blue)
4. Power button
5. On LED, right (blue)
6. Overtemperature LED, right (yellow)
7. Fault LED, right (red)
Power button
The power button switches the amplifier on from standby. The 855 must be
connected to the AC mains supply and the power switch on the rear panel
must be switched on.
On LEDs
None of the indicator lamps illuminates when the 855 is in standby. They show
blue when the amplifier is operating. When the amplifier is switched off, the
‘on’ LEDs will flash continuously for 5 seconds, during which time it is not
possible to switch the amplifier back on.
6

855 Dual Mono Power Amplifier
Overtemperature LEDs
When the temperature first exceeds normal levels, these LED flash yellow. If the
temperature continues to rise, the LEDs illuminate constantly and the output
will be muted until the temperature returns to normal.
Fault LEDs
The red LEDs illuminate whenever the protection circuit cuts in. This warns you
that there is a fault condition. The protection circuit first mutes the output and,
if the fault condition persists, switches off the amplifier.
Rear view
1 2 3 4 5 106 7 8 9
MODEL NO. 855
DUAL MONO POWER AMPLIFIER
12
3
1 = GND
2 = POS
3 = NEG
SPEAKER RIGHT
INPUT RIGHT
USB
FUSE RIGHT FUSE LEFT
SYSCOM
SPEAKER LEFT
INPUT LEFT
MADE IN GERMANY
! warning !
risk of electric shock
do not remove cover
1. Speaker terminals, right
2. RCA input, right
3. Balanced/unbalanced switch
4. XLR input, right
5. Power (on/off) switch
6. IEC power inlet
7. SYSCOM connection
8. RCA input, left
9. Balanced/unbalanced switch, left
10. XLR input, left
11. Speaker terminals, left
7

855 Dual Mono Power Amplifier
Audio inputs
The audio inputs of the 855 are balanced only. Input impedance is 1200 ohms.
Please bear this in mind when choosing a preamplifier. Preamplifiers with weak
output stages, and particularly tube preamps, are not suitable, as they are
unable to handle this input impedance without distorting.
XLR pin connections:
Pin 3: Signal -
Pin 2: Signal +
Pin1: Ground
Speaker outputs
The loudspeaker outputs on the 855 are in the form of terminal posts, which
accept spade connectors and 4mm banana plugs.
Important: the 855 is a fully balanced amplifier! This means that both the red
and the black terminals are connected directly to the amplifier outputs. Never
connect the black terminal to earth! This could cause serious damage to one
half of the power amplifier!
Power requirement
The power inlet is designed to take a removable IEC cable. We recommend you
use a high quality power cable. Please observe the red marking on the power
receptacle: red should connect with the live (L) conductor from the mains
circuit.
Power (on/off) switch
The power switch completely disconnects the amplifier from the AC mains
supply.
SYSCOM
The SYCOM connector enables you to switch the 855 on remotely. Use the
SYSCOM cable supplied with your amplifier to connect the amp to 820 or 830.
When you switch the 820 or 830 on, the 855 will power up automatically at the
same time.
8

855 Dual Mono Power Amplifier
Setting up
Place the 855 in the location in which you intend to use it. Do not try to move
the amplifier when there are cables connected or when it is switched on.
Connect your other components using high quality interconnects and speaker
cables. Make sure that the polarity of the speaker cables is correct. Now, plug
your power amplifier into the mains. Before you do this, use a phase finder to
determine which conductor on your distribution board is live. The live
conductor should be connected to the pin marked red on the 855's IEC socket.
Switching on and off
Switch the 855 on with the power switch on the rear of the unit. The 855 is
now in standby mode. The blue 'on' LEDs will illuminate briefly. To switch
the unit on and off, press the POWER button. When using the SYSCOM cable,
the power amplifier will power up at the same time as the preamplifier.
The blue LEDs remain illuminated during normal operation.
SYSCOM
If the 855 is linked to an 800-Series master unit, the latter takes over remote on
and off switching. Remote switch-on is only possible when the 855 is in
standby mode. It is also possible for a component in the chain from another
manufacturer to remotely switch the 855 on and off via a Remote link. The
switching voltage must be between 5V and 12VDC.
Lindemann audiotechnik can supply adapter cables upon request.
SlaveMaster
855
Power Amp
820/830
SACD/PreAmp
855
optional
9

855 Dual Mono Power Amplifier
Cooling
The amount of heat generated by the 855 depends on how hard it is driven. It
is very important to ensure that there is unimpeded circulation of fresh air
from below and that hot air can escape behind and above the unit. When you
install your amplifier, therefore, make sure to provide adequate clearance
above and behind the unit. Make sure also that the location is protected
against direct sunlight. Operating the amplifier at room temperatures higher
than 30°C can lead to heat dissipation problems and is not recommended. The
855 is equipped with active cooling via a speed-controlled fan, which switches
on according to the ambient temperature and how hard the amplifier is
driven. At normal listening volumes, however, this is unlikely to happen.
Protection circuits
Intelligent protection circuits constantly ensure the proper functioning of the
855 amplifier. If a fault such as a DC, surge current or overtemperature fault
should occur, power to the electronics is immediately shut down to prevent
damage to the amplifier and speakers. A built-in inrush current limiter operates
at turn-on to protect the amplifier's components and prevent the mains circuit
breaker or fuse from tripping.
Overtemperature
Flashing yellow LEDs will warn you if the operating temperature becomes too
high while the amplifier is running. If you do not take steps to reduce the
output level, the amplifier will switch off and the fan will run at maximum
speed to cool the amplifier down to a safe temperature. While this is
happening, both yellow overtemperature LEDs illuminate continuously and
you will not be able to switch the 855 back on.
DC voltage
If an excessively high DC voltage is detected at the output, the 855 mutes the
signal and the red Fault LED illuminates. If the fault continues, the 855
disconnects the power to the amplifier. If this happens, the amplifier must be
switched off and restarted. However, if the amplifier will not restart, it has been
damaged and must be serviced!
Overcurrent
An over-current limiter protects the output stage of the 855 against excessive
current.
Power failure
A supply voltage sensor constantly monitors the mains supply voltage and
switches the unit off in the event of a power failure.
10

855 Dual Mono Power Amplifier
Specification
Measuring conditions: 22°C, 230 V supply voltage.
Dimensions .......................................................................... 440 x 165 x 363mm (W x H x D)
Weight .................................................................................................................................. 27.0 kg
Power requirements......................................................................................... 230V 50/60 Hz
Power consumption ...................................................................................1600 W maximum
Power consumption (normal operation) ..................................................................... 70 W
Power consumption (standby) ....................................................................................... 0.5 W
Power output ..................................................................... 400 W per channel into 4 ohms
Frequency response .............................................................................. 1Hz – 200 kHz (-3dB)
Voltage Gain ........................................................................................................................... 29dB
S/N (A-weighted, ref. 10V output) ..............................................................................>106dB
Input impedance ....................................................................................1200 ohms balanced
Input sensitivity........................................................................................ 0.7 V for 20V output
..................................................................................................................... 1.4 V for rated output
Please note:
Our product policy is one of continuous development. Specifications are
therefore subject to change without notice
11

855 Dual Mono Power Amplifier
CE declaration of conformity
Product type: Power amplifier
Model: 855 DUAL MONO POWER AMPLIFIER
LINDEMANN audiotechnik GmbH declares that this product complies with the
Low Voltage Directive 73/23/EEC and the Electromagnetic Compatibility
Directive 89/336/EEC, amended by the directives 92/31/EEC and 93/68/EEC.
The conformity of the designated product with the provisions of directive
number 73/23/EEC is proved by full compliance with the following standards:
EN 60065 (Date of issue 1998)
EN 61000-3-2 (Date of issue 2000)
EN 61000-3-3 (Date of issue 2001)
The conformity of the designated product with the provisions of directive
number 89/336/EEC is proved by full compliance with the following standards:
EN 55013 (Date of issue 2001)
EN 55020 (Date of issue 2002)
12

855 Dual Mono Power Amplifier
Guarantee and Service
At Lindemann we value our customers. When a Lindemann product leaves our
factory we do not see this as the last step of the process, rather it is the beginning
of our long-standing relationship with you. Thereafter we seek to support you in
every way that we can. Should you require any further information feel free to
contact us at Lindemann audiotechnik.
This product is guaranteed under the conditions that apply in the country of
purchase and your statutory rights are not limited. In addition to any statutory
rights you may have, Lindemann undertake to replace any parts that have failed
due to faulty manufacture. To help us, please ask your Lindemann retailer about
the Lindemann warranty scheme in operation in your country.
In parts of Europe and some other markets, extended warranty may be available
to customers who register their purchase with the local Lindemann distributor. A
warranty registration card is included with the product and should be stamped
by your retailer and returned to the local distributor as soon as possible.
Warning
Unauthorised servicing or dismantling of the product invalidates the
manufacturers warranty. There are no user serviceable parts inside the product
and all enquiries relating to product servicing should be referred to authorised
retailers only.
Technical support and information
For technical support, product queries and information, please contact either
your local retailer, the local Lindemann distributor or Lindemann audiotechnik.
Full details of your local distributor can be found on the Lindemann website:
www.lindemann-audio.de
Important
Please keep a copy of the sales receipt to establish the purchase date of the
product.
Please ensure that your equipment is insured by you during any transit or
shipment for repair.
Lindemann audiotechnik GmbH
Carl-Benz-Straße 12
D-82205 Gilching
Germany
Tel: [phone]
Fax: [phone]
Website: www.lindemann-audio.de
E-mail: [email protected]
[email protected]
13

855 Dual Mono Power Amplifier
Directive on waste electrical and electronic
equipment
Electronic equipment should not be disposed of with household waste but in
compliance with the Directive 2002/96/EU of the European Parliament and of
the Council of 27 January 2003 on waste electrical and electronic equipment.
When this equipment reaches the end of its working life, please take it to one of
the available collection points.
The symbol (below) is attached to this product.
14

855 Dual Mono Power Amplifier • Owner’s Manual / English / Rev. 1 • 712
Lindemann audiotechnik GmbH • Carl-Benz-Straße 12 • D-82205 Gilching • Germany
Web www.lindemann-audio.de • E-mail [email protected]
Tel [phone] • Fax [phone]