SIST EN 60268-3:2013

Sound system equipment -- Part 3: Amplifiers (GMT) (IEC 60268-3:2013)

This part of IEC 60268 applies to analogue amplifiers, and the analogue parts of analogue/digital amplifiers, which form part of a sound system for professional or household applications. It specifies the characteristics which should be included in specifications of amplifiers and the corresponding methods of measurement. In general, the specified methods of measurement are those which are seen to be most directly related to the characteristics. This does not exclude the use of other methods which give equivalent results. In general, the methods are based on the simplest measuring equipment which can provide useful results. This does not exclude the use of more complex equipment which can give higher accuracy and/or allow automatic measurement and recording of results. Rated conditions and standard measuring conditions are specified in order to allow measurements to be reliably repeated.

Elektroakustische Geräte - Teil 3: Verstärker (IEC 60268-3:2013)

Equipements pour systèmes électroacoustiques - Partie 3: amplificateurs (CEI 60268-3:2013)

La CEI 60268-3:2013 s'applique aux amplificateurs analogiques et aux parties analogiques des amplificateurs analogiques/numériques, qui font partie d'un système électroacoustique destiné à des applications professionnelles ou grand public. Elle spécifie les caractéristiques qu'il convient d'inclure dans les spécifications des amplificateurs, ainsi que les méthodes de mesure correspondantes. Cette quatrième édition annule et remplace la troisième édition parue en 2000 et constitue une révision technique. Elle inclut les modifications techniques suivantes:  - la condition assignée des amplificateurs multivoies a été étendue;  - un montage pour les amplificateurs de la classe D a été ajouté;  - la méthode de mesure de la puissance de sortie (limitée par la distorsion) a été étendue;  - une Annexe B a été ajoutée.

Elektroakustične naprave - 3. del: Ojačevalniki (GMT) (IEC 60268-3:2013)

Ta del standarda IEC 60268 se uporablja za analogne ojačevalnike in analogne dele analognih/digitalnih ojačevalnikov, ki so del zvočnega sistema za profesionalno ali domačo uporabo. Podaja značilnosti, ki bi morale biti vključene v specifikacijah ojačevalnikov, in ustrezne metode merjenja. V splošnem so podane metode merjenja tiste metode, ki so najbolj neposredno povezane z značilnostmi. To ne izključuje uporabe drugih metod, ki dajejo enakovredne rezultate. Metode na splošno temeljijo na najpreprostejši merilni opremi, ki lahko zagotovi uporabne rezultate. To ne izključuje uporabe bolj zapletene opreme, ki lahko zagotavlja večjo natančnost in/ali omogoča samodejno merjenje in zapisovanje rezultatov. Določeni so nazivni pogoji in standardni pogoji merjenja, ki zagotavljajo zanesljivo ponovitev merjenja.

General Information

• Status: Withdrawn
• Publication Date: 16-Oct-2013
• Withdrawal Date: 03-Mar-2021
• ICS: 33.160.10 - Amplifiers
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 03-Mar-2021
• Due Date: 26-Mar-2021
• Completion Date: 04-Mar-2021
• Ref Project: EN 60268-3:2013 - Sound system equipment - Part 3: Amplifiers

Relations

• Replaced By: SIST EN IEC 60268-3:2019 - Sound system equipment - Part 3: Amplifiers
• Effective Date: 26-Jun-2018
• Replaces: SIST EN 60268-3:2003 - Sound system equipment -- Part 3: Amplifiers
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60268-3:2013
01-november-2013
1DGRPHãþD
SIST EN 60268-3:2003
(OHNWURDNXVWLþQHQDSUDYHGHO2MDþHYDOQLNL*07,(&
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
SIST EN 60268-3:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60268-3:2013

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SIST EN 60268-3:2013

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

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SIST EN 60268-3:2013
EN 60268-3:2013 - 2 -

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.
EN 60268-3:2013 includes the following significant technical changes with respect to 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.

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SIST EN 60268-3:2013
- 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

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SIST EN 60268-3:2013

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SIST EN 60268-3:2013



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



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60268-3:2013
– 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

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SIST EN 60268-3:2013
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 . 30
14.11.1 Gain-frequency response . 30
14.11.2 Gain-limited effective frequency range . 30
14.11.3 Distortion-limited effective frequency range . 31
14.11.4 Phase-frequency response . 31
14.12 Amplitude non-linearity . 31
14.12.1 General . 31
14.12.2 Rated total harmonic distortion, characteristic to be specified . 31
14.12.3  Total harmonic distortion under standard measuring conditions . 32
14.12.4 Total harmonic distortion as a function of amplitude and frequency . 32
14.12.5  Harmonic distortion of the nth order under standard measuring
conditions . 33
14.12.6  Harmonic distortion of the nth order as a function of amplitude and
frequency . 34
14.12.7  Modulation distortion of the nth order (where n = 2 or n = 3) . 34
14.12.8 Difference-frequency distortion of the nth order (where n = 2 or n =
3) . 36
14.12.9 Dynamic intermodulation distortion (DIM) . 37
14.12.10 Total difference frequency distortion . 39
14.12.11 Weighted total harmonic distortion . 40
14.13 Noise . 41
14.13.1  Characteristic to be specified . 41
14.13.2  Method of measurement. 41
14.14 Hum . 42
14.14.1 General . 42
14.14.2  Characteristics to be specified . 42
14.14.3 Method of measurement. 42
14.15 Balanced inputs and outputs . 43
14.15.1 Balance of the input . 43
14.15.2  Overload (distortion-limited) peak-to-peak common-mode input
voltage . 44
14.15.3  Balance of the output . 44

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SIST EN 60268-3:2013
– 4 – 60268-3  IEC:2013
14.16 Cross-talk and separation in multi-channel amplifiers . 46
14.16.1 Characteristics to be specified . 46
14.16.2 Method of measurement. 46
14.17 Gain and phase differences between channels in multi-channel amplifiers . 47
14.17.1  Gain difference . 47
14.17.2 Phase difference . 48
14.18 Dimensions and mass, characteristics to be specified . 48
Annex A (informative) Balanced interfaces . 56
Annex B (informative) Specification of a multi-channel amplifier. 57
Bibliography . 59

Figure 1 – Example block diagram for multi-channel amplifier . 49
Figure 2 – Arrangements for the Class D amplifier . 50
Figure 3 – Arrangements for measuring input impedance . 51
Figure 4 – Oscillogram when measuring overload restoring time . 52
Figure 5 – Protection against potentially damaging combinations of output voltage and
current . 53
Figure 6 – Arrangement for combining two input signals . 54
Figure 7 – Frequency spectrum below 30 kHz of the signal for measuring dynamic
intermodulation distortion . 54
Figure 8 – Arrangement for measuring the balance of a balanced input . 55
Figure 9 – Arrangement for measuring the internal impedance balance of a balanced
output . 55
Figure 10 – Arrangement for measuring the voltage symmetry of a balanced output . 55
Figure B.1 – Block diagram for a 5.1 channel surround amplifier . 57
Figure B.2 – Block diagram for a 5 channel surround amplifier . 58

Table 1 – Different rated total harmonic distortion and rated distortion-limited output
power specifications for the same amplifier . 27
Table 2 – Distortion components due to dynamic intermodulation distortion falling in
the frequency range up to 20 kHz . 38

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SIST EN 60268-3:2013
60268-3  IEC:2013 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SOUND SYSTEM EQUIPMENT –

Part 3: Amplifiers


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60268-3 has been prepared by IEC technical committee 100:
Audio, video and multimedia systems and equipment.
This fourth edition cancels and replaces the third edition published in 2000. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– 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.

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SIST EN 60268-3:2013
– 6 – 60268-3  IEC:2013
The text of this standard is based on the following documents:
FDIS Report on voting
100/2010A/CDV 100/2066/RVC

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60268 series, published under the general title Sound system
equipment, can be found on the IEC website.
This part of IEC 60268 shall be used in conjunction with IEC 60268-1:1985 and
IEC 60268-2:1987.

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SIST EN 60268-3:2013
60268-3  IEC:2013 – 7 –
SOUND SYSTEM EQUIPMENT –

Part 3: Amplifiers



1 Scope
This part of IEC 60268 applies to analogue amplifiers, and the analogue parts of
analogue/digital amplifiers, which form part of a sound system for professional or household
applications. It specifies the characteristics which should be included in specifications of
amplifiers and the corresponding methods of measurement.
1
NOTE The methods of measurement for digital amplifiers and similar equipment are given in IEC 61606 [4] .
In general, the specified methods of measurement are those which are seen to be most
directly related to the characteristics. This does not exclude the use of other methods which
give equivalent results.
In general, the methods are based on the simplest measuring equipment which can provide
useful results. This does not exclude the use of more complex equipment which can give
higher accuracy and/or allow automatic measurement and recording of results.
Rated conditions and standard measuring conditions are specified in order to allow
measurements to be reliably repeated.
2 Normative references
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.
IEC 60065:2001, Audio, video and similar electronic apparatus – Safety requirements
Amendment 1:2005
Amendment 2:2010
IEC 60268-1:1985, Sound system equipment – Part 1: General
Amendment 1:1988
Amendment 2:1988
IEC 60268-2:1987, Sound system equipment – Part 2: Explanation of general terms and
calculation methods
Amendment 1:1991
IEC 60417, Graphical symbols for use on equipment. Available from: http://www.graphical-
symbols.info/equipment
IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) – Part 4-13: Testing and
measurement techniques – Harmonics and interharmonics including mains signalling at a.c.
power port, low frequency immunity tests
Amendment 1:2009
––––––––––––
1
 Numbers in square brackets refer to the Bibliography.

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SIST EN 60268-3:2013
– 8 – 60268-3  IEC:2013
IEC 61000-4-17:1999, Electromagnetic Compatibility (EMC) – Part 4-17: Testing and
measurement techniques – Ripple on d.c. input power port immunity test
Amendment 1:2001
Amendment 2:2008
IEC 61000-4-29:2000, Electromagnetic Compatibility (EMC) – Part 4-29: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations on d.c.
input power ports immunity tests
IEC 61938:1996, Audio, video and audiovisual systems – Interconnections and matching
values – Preferred matching values of analogue signals
3 Conditions
3.1 Rated conditions and standard measuring conditions
3.1.1 Overview
For convenience in specifying how amplifiers shall be set up for measurement, sets of
conditions are specified in this standard, under the titles of rated conditions and standard
measuring conditions.
A full explanation of the term "rated" is given in IEC 60268-2.
The rated conditions for amplifiers are:
– rated power supply voltage;
– rated source impedance;
– rated source e.m.f.;
– rated load impedance;
– rated total harmonic distortion, or rated (distortion-limited) output voltage or power;
– rated mechanical and
...