EN IEC 60268-3:2018

SLOVENSKI STANDARD
01-februar-2019
1DGRPHãþD
SIST EN 60268-3:2013
(OHNWURDNXVWLþQHQDSUDYHGHO2MDþHYDOQLNL
Sound system equipment - Part 3: Amplifiers
Elektroakustische Geräte - Teil 3: Verstärker
Equipements pour systèmes électroacoustiques - Partie 3: Amplificateurs
Ta slovenski standard je istoveten z: EN IEC 60268-3:2018
ICS:
33.160.10 2MDþHYDOQLNL Amplifiers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60268-3

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2018
ICS 33.160.10 Supersedes EN 60268-3:2013
English Version
Sound system equipment - Part 3: Amplifiers
(IEC 60268-3:2018)
Equipements pour systèmes électroacoustiques - Partie 3: Elektroakustische Geräte - Teil 3: Verstärker
amplificateurs (IEC 60268-3:2018)
(IEC 60268-3:2018)
This European Standard was approved by CENELEC on 2018-05-30. 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, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60268-3:2018 E

European foreword
The text of document 100/2960/CDV, future edition 5 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 IEC 60268-3:2018.

The following dates are fixed:
• latest date by which the document has to be (dop) 2019-02-28
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2021-05-30
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60268-3:2013.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60268-3:2018 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 61606 series NOTE Harmonized as EN 61606 series.
IEC 60268-5:2003 NOTE Harmonized as EN 60268-5:2003.
IEC 60268-5:2003/A1:2007 NOTE Harmonized as EN 60268-5:2003/A1:2009.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60065 (mod) 2014 Audio, video and similar electronic EN 60065 2014
apparatus - Safety requirements
- -  + A11 2017
IEC 60268-1 1985 Sound system equipment -- Part 1: HD 483.1 S2 1989
General
+ A1 1988  - -
+ A2 1988  - -
IEC 60268-2 1987 Sound system equipment - Part 2: HD 483.2 S2 1993
Explanation of general terms and
calculation methods
+ A1 1991  - -
IEC 60417 2002 Graphical symbols for use on equipment - -
IEC 60958 series Digital audio interface EN 60958 series
IEC 61000-4-13 2002 Electromagnetic compatibility (EMC) -- Part EN 61000-4-13 2002
4-13: Testing and measurement
techniques - Harmonics and
interharmonics including mains signaling at
a.c. power port, low frequency immunity
tests
+ A1 2009  + A1 2009
+ A2 2015  + A2 2016
IEC 61000-4-17 1999 Electromagnetic compatibility (EMC) -- Part EN 61000-4-17 1999
4-17: Testing and measurement
techniques - Ripple on d.c. input power
port immunity test
+ A1 2001  + A1 2004
+ A2 2008  + A2 2009
IEC 61000-4-29 2000 Electromagnetic compatibility (EMC) -- Part EN 61000-4-29 2000
4-29: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations on d.c.
input power port immunity tests
IEC 61606-1 2009 Audio and audiovisual equipment - Digital EN 61606-1 2009
audio parts - Basic measurement methods
of audio characteristics -- Part 1: General
IEC 61883-6 2014 Consumer audio/video equipment - Digital EN 61883-6 2014
interface - Part 6: Audio and music data
transmission protocol
IEC 61938 2013 Multimedia systems - Guide to the EN 61938 2013
recommended characteristics of analogue
interfaces to achieve interoperability

IEC 60268-3 ®
Edition 5.0 2018-04
INTERNATIONAL
STANDARD
Sound system equipment –
Part 3: Amplifiers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.160.10 ISBN 978-2-8322-5587-2

– 2 – IEC 60268-3:2018  IEC 2018
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and rated values . 8
3.1 Terms and definitions . 8
3.2 Rated values . 9
4 Conditions . 9
4.1 Rated conditions and standard measuring conditions . 9
4.1.1 Overview . 9
4.1.2 Rated conditions . 10
4.1.3 Standard measuring conditions . 11
4.2 Other conditions. 11
5 Classes of operation . 11
6 Interchangeable parts . 11
7 Automatic controls . 11
8 Power supply . 12
9 Position of the volume controls . 12
10 Pre-conditioning for measurements . 12
11 Series of measurements . 12
12 Variable consumption apparatus . 13
13 Marking . 13
14 Operating environment . 13
15 Characteristics to be specified, and their methods of measurement . 14
15.1 Power supply characteristics . 14
15.1.1 Characteristics to be specified . 14
15.1.2 Method of measurement . 14
15.2 Tolerance of (long-term) power supply voltage variations . 14
15.2.1 Characteristic to be specified . 14
15.2.2 Methods of measurement . 15
15.3 Tolerance of power supply frequency variations . 16
15.3.1 Characteristics to be specified . 16
15.3.2 Methods of measurement . 16
15.4 Tolerance of power supply harmonics and ripple . 16
15.4.1 Characteristics to be specified . 16
15.4.2 Methods of measurement . 17
15.5 Input characteristics . 17
15.5.1 Rated source impedance, characteristic to be specified . 17
15.5.2 Input impedance . 17
15.5.3 Rated source e.m.f., characteristic to be specified . 19
15.5.4 Minimum source e.m.f. for rated distortion-limited output voltage . 19
15.6 Output characteristics . 19
15.6.1 Rated load impedance, characteristic to be specified . 19
15.6.2 Output source impedance . 20
15.6.3 Output voltage and power (distortion-limited) . 21
15.6.4 Maximum effective output power (distortion-limited at 10 %) . 22

IEC 60268-3:2018  IEC 2018 – 3 –
15.6.5 Regulation . 23
15.6.6 Overload restoring time . 24
15.7 Limiting characteristics . 24
15.7.1 Overload source e.m.f. . 24
15.7.2 Short-term maximum output voltage and power . 25
15.7.3 Long-term maximum output voltage and power . 25
15.7.4 Temperature-limited output power . 26
15.8 Characteristics of protection circuits . 27
15.8.1 General . 27
15.8.2 Protection against potentially damaging combinations of output voltage
and current . 28
15.8.3 Characteristics of d.c. offset protection circuits . 29
15.9 Sustaining-time for rated (distortion-limited) output voltage or power . 30
15.9.1 General . 30
15.9.2 Characteristic to be specified . 31
15.9.3 Method of measurement . 31
15.10 Gain . 31
15.10.1 Voltage gain and e.m.f. gain . 31
15.10.2 Maximum e.m.f. gain .
...