EN 60268-3:2013

SLOVENSKI STANDARD
01-november-2013
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SIST EN 60268-3:2003
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Sound system equipment -- Part 3: Amplifiers (GMT) (IEC 60268-3:2013)
Elektroakustische Geräte - Teil 3: Verstärker (IEC 60268-3:2013)
Equipements pour systèmes électroacoustiques - Partie 3: amplificateurs (CEI 60268-
3:2013)
Ta slovenski standard je istoveten z: EN 60268-3:2013
ICS:
33.160.10 2MDþHYDOQLNL Amplifiers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60268-3
NORME EUROPÉENNE
June 2013
EUROPÄISCHE NORM
ICS 33.160.10 Supersedes EN 60268-3:2000

English version
Sound system equipment -
Part 3: Amplifiers
(IEC 60268-3:2013)
Equipements pour systèmes Elektroakustische Geräte -
électroacoustiques - Teil 3: Verstärker
Partie 3: amplificateurs (IEC 60268-3:2013)
(CEI 60268-3:2013)
This European Standard was approved by CENELEC on 2013-05-28. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60268-3:2013 E
Foreword
The text of document 100/2010A/CDV, future edition 4 of IEC 60268-3, prepared by IEC/TC 100 "Audio,
video and multimedia systems and equipment" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN 60268-3:2013.
The following dates are fixed:
• latest date by which the document has (dop) 2014-02-28
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-05-28
• latest date by which the national
standards conflicting with the

document have to be withdrawn
This document supersedes EN 60268-3:2000.
– rated condition of multi-channel amplifier is expanded;
– arrangement for the D-class amplifier is added;
– method of measurement for output power (distortion-limited) is expanded;
– Annex B is newly added.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 60268-3:2013 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60268-5:2003 NOTE  Harmonised as EN 60268-5:2003 (not modified).
IEC 61606 series NOTE  Harmonised in EN 61606 series.

- 3 - EN 60268-3:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60065 (mod) 2001 Audio, video and similar electronic apparatus - EN 60065 2002
+ corr. August 2002 Safety requirements + corr. August 2007
+ A1 (mod) 2005 + A1 2006
+ A2 (mod) 2010 + A2 2010
+ A11 2008
+ A12 2011
IEC 60268-1 1985 Sound system equipment - HD 483.1 S2 1989
+ A1 1988 Part 1: General
+ A2 1988
IEC 60268-2 1987 Sound system equipment - HD 483.2 S2 1993
+ A1 1991 Part 2: Explanation of general terms and
calculation methods
IEC 60417 Data- Graphical symbols for use on equipment - -
base
IEC 61000-4-13 2002 Electromagnetic compatibility (EMC) - EN 61000-4-13 2002
+ A1 2009 Part 4-13: Testing and measurement + A1 2009
techniques - Harmonics and interharmonics
including mains signalling at a.c. power port,
low frequency immunity tests
IEC 61000-4-17 1999 Electromagnetic compatibility (EMC) - EN 61000-4-17 1999
+ A1 2001 Part 4-17: Testing and measurement + A1 2004
+ A2 2008 techniques - Ripple on d.c. input power port + A2 2009
immunity test
IEC 61000-4-29 2000 Electromagnetic compatibility (EMC) - EN 61000-4-29 2000
Part 4-29: Testing and measurement
techniques - Voltage dips, short interruptions
and voltage variations on d.c. input power port
immunity tests
IEC 61938 1996 Audio, video and audiovisual systems - EN 61938 1997
Interconnections and matching values - + corr. February 1997
Preferred matching values of analogue signals

IEC 60268-3 ®
Edition 4.0 2013-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Sound system equipment –
Part 3: Amplifiers
Équipements pour systèmes électroacoustiques –

Partie 3: Amplificateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 33.160.10 ISBN 978-2-83220-735-2

– 2 – 60268-3  IEC:2013
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Conditions . 8
3.1 Rated conditions and standard measuring conditions . 8
3.1.1 Overview . 8
3.1.2 Rated conditions . 8
3.1.3 Standard measuring conditions . 9
3.2 Other conditions . 9
4 Classes of operation . 9
5 Interchangeable parts . 10
6 Automatic controls . 10
7 Power supply . 10
8 Position of the volume controls . 10
9 Pre-conditioning for measurements . 11
10 Series of measurements . 11
11 Variable consumption apparatus . 11
12 Marking . 11
13 Operating environment . 12
14 Characteristics to be specified, and their methods of measurement . 12
14.1 Power supply characteristics . 12
14.1.1 Characteristics to be specified . 12
14.1.2 Method of measurement . 12
14.2 Tolerance of (long-term) power supply voltage variations . 13
14.2.1 Characteristic to be specified . 13
14.2.2 Methods of measurement . 13
14.3 Tolerance of power supply frequency variations . 14
14.3.1 Characteristics to be specified . 14
14.3.2 Methods of measurement . 14
14.4 Tolerance of power supply harmonics and ripple . 15
14.4.1 Characteristics to be specified . 15
14.4.2 Methods of measurement . 15
14.5 Input characteristics . 15
14.5.1 Rated source impedance, characteristic to be specified . 15
14.5.2 Input impedance . 15
14.5.3 Rated source e.m.f., characteristic to be specified . 17
14.5.4 Minimum source e.m.f. for rated distortion-limited output voltage . 17
14.6 Output characteristics . 18
14.6.1 Rated load impedance, characteristic to be specified . 18
14.6.2 Output source impedance . 18
14.6.3 Output voltage and power (distortion-limited) . 19
14.6.4 Regulation . 20
14.6.5 Overload restoring time . 20
14.7 Limiting characteristics . 21
14.7.1 Overload source e.m.f. . 21

60268-3  IEC:2013 – 3 –
14.7.2 Short-term maximum output voltage and power . 21
14.7.3 Long-term maximum output voltage and power . 22
14.7.4 Temperature-limited output power . 23
14.8 Characteristics of protection circuits . 24
14.8.1 General . 24
14.8.2 Protection against potentially damaging combinations of output
voltage and current . 24
14.8.3 Characteristics of d.c. offset protection circuits . 25
14.9 Sustaining-time for rated (distortion-limited) output voltage or power . 26
14.9.1 General . 26
14.9.2 Characteristic to be specified . 27
14.9.3 Method of measurement . 28
14.10 Gain . 28
14.10.1  Voltage gain and e.m.f. gain . 28
14.10.2 Maximum e.m.f. gain . 28
14.10.3 Attenuation characteristic of the volume control . 28
14.10.4 Attenuation characteristic of balance controls for multi-channel
equipment . 29
14.11  Response .
...