SIST EN 61305-3:1999

Household high-fidelity audio equipment and systems - Methods of measuring and specifying the performance -- Part 3: Amplifiers

Applies to household high-fidelity audio amplifiers of all types. Also applies, except where stated, to equipment having multiple functions, including audio amplifying functions.

Hifi-Geräte und -Anlagen für den Heimgebrauch - Verfahren zur Messung und Angabe der Leistungskennwerte -- Teil 3: Verstärker

Equipements et systèmes audio grand public haute fidélité - Méthodes pour mesurer et spécifier les performances -- Partie 3: Amplificateurs

S'applique aux amplificateurs audio grand public haute fidélité de tous types. Sauf avis contraire, elle s'applique également aux équipements ayant des fonctions multiples y compris des fonctions d'amplification audio.

Household high-fidelity audio equipment and systems - Methods of measuring and specifying the performance -- Part 3: Amplifiers (IEC 61305-3:1995)

General Information

• Status: Published
• Publication Date: 31-Mar-1999
• ICS: 33.160.10 - Amplifiers
• ICS: 33.160.30 - Audio systems
• Technical Committee: AVM - Audio, video and multimedia systems and equipment
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-1999
• Due Date: 01-Apr-1999
• Completion Date: 01-Apr-1999
• Ref Project: EN 61305-3:1995 - Household high-fidelity audio equipment and systems - Methods of measuring and specifying the performance - Part 3: Amplifiers

Overview

EN 61305-3:1995 (IEC 1305-3:1995) - Household high-fidelity audio equipment and systems - Methods of measuring and specifying the performance - Part 3: Amplifiers. Published by CLC, this standard defines measurement methods and specification content for household high-fidelity audio amplifiers of all types and for multi‑function equipment that includes audio amplifying functions. It is intended to be read in conjunction with IEC 1305-1 (General) and references existing sound-system and digital-audio standards for test conditions.

Key topics and technical requirements

The standard lays out required measurement conditions and procedures for amplifier performance parameters, including:

• Scope and test conditions

  • Applies to domestic hi‑fi amplifiers and multifunction units.
  • Electrical test conditions follow IEC 268-3, source values per IEC 268-15 (analogue) and IEC 958 (digital).
  • Climatic conditions referenced to IEC 1305-1.

• Measured characteristics (methods and reporting)

  • Effective frequency range - response limits: ±1.5 dB for linear (non-equalizing) inputs, ±2 dB for equalizing inputs.
  • Gain difference between channels - worst value between 250 Hz and 6.3 kHz, across specified volume positions.
  • Total harmonic distortion (THD) - worst value from 63 Hz to 12.5 kHz, measured over defined output levels.
  • Distortion-limited effective frequency range - frequencies where THD is 3 dB below the rated distortion-limited output.
  • Rated (distortion-limited) output - measured per IEC 268-3, with guidance on sustaining times.
  • Maximum output voltage/current and overload source e.m.f.
  • Channel separation and cross-talk - specified measurement bands and worst-case reporting.
  • Signal-to-noise ratio (SNR) - band-limited (unweighted) and A-weighted SNR using true RMS meters and defined filters; procedures for volume control positions (rated and -30 dB).
  • Digital-input distortion/noise - tests at FS, FS‑30 dB, FS‑60 dB signal levels.

• Specification content

  • Comprehensive product specifications shall include, at minimum, effective frequency range, THD, rated output, channel separation, cross-talk and A-weighted SNR.

Applications and who uses it

EN 61305-3:1995 is used by:

• Manufacturers and test engineers for product development, verification, and datasheet specification of household hi‑fi amplifiers.
• Certification bodies and laboratories performing standardized performance testing.
• Product managers and purchasers who need consistent, comparable technical specifications for amplifiers.
• Integrators and audio reviewers evaluating fidelity metrics such as THD, SNR, channel separation and rated output.

Keywords: EN 61305-3:1995, IEC 1305-3, household high-fidelity audio amplifiers, measurement methods, performance specification, total harmonic distortion, signal-to-noise ratio, amplifier testing.

Related standards

• IEC 1305-1 (Household high-fidelity audio equipment - General)
• IEC 268 series (Sound system equipment - amplifiers and general methods)
• IEC 268-15 (preferred matching values)
• IEC 958 (Digital audio interface)

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-1999
Household high-fidelity audio equipment and systems - Methods of measuring and
specifying the performance -- Part 3: Amplifiers (IEC 61305-3:1995)
Household high-fidelity audio equipment and systems - Methods of measuring and
specifying the performance -- Part 3: Amplifiers
Hifi-Geräte und -Anlagen für den Heimgebrauch - Verfahren zur Messung und Angabe
der Leistungskennwerte -- Teil 3: Verstärker
Equipements et systèmes audio grand public haute fidélité - Méthodes pour mesurer et
spécifier les performances -- Partie 3: Amplificateurs
Ta slovenski standard je istoveten z: EN 61305-3:1995
ICS:
33.160.10 2MDþHYDOQLNL Amplifiers
33.160.30 Avdio sistemi Audio systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CE1
NORME
INTERNATIONALE IEC
1305-3
INTERNATIONAL
Première édition
STANDARD
First edition
1995-05
Equipements et systèmes audio grand public
fidélité - Méthodes pour mesurer et
haute
spécifier les performances -
Partie 3:
Amplificateurs
Household high-fidelity audio equipment
and systems - Methods of measuring and
specifying the performance -
Part 3:
Amplifiers
© CEI 1995 Droits de reproduction réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,
la including photocopying and microfilm, without permission
cédé, électronique ou mécanique, y compris photocopie et
l'éditeur. in writing from the publisher.
les microfilms, sans raccord écrit de
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève, Suisse
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1305-3 ©IEC:1995 - 3 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
HOUSEHOLD HIGH-FIDELITY AUDIO EQUIPMENT
AND SYSTEMS - METHODS OF MEASURING AND
SPECIFYING THE PERFORMANCE -
Part 3: Amplifiers
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
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. The 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 the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
International Standard IEC 1305-3 has been prepared by IEC technical committee 84:
Equipment and systems in the field of audio, video and audiovisual engineering.
The text of this standard is based on the following documents:
DIS Report on voting
84/397/DIS 84/415/RVD
Full information on the voting for the approval of this standard can be found in the repo rt
on voting indicated in the above table.
IEC 1305 consists of the following parts, under the general title Household high-fidelity
audio equipment and systems - Methods of measuring and specifying the performance:
- Part 1: General
- rt 2: FM radio tuners
Pa
- Part 3: Amplifiers
1305-3 © I EC:1995 - 5 -
HOUSEHOLD HIGH-FIDELITY AUDIO EQUIPMENT
AND SYSTEMS - METHODS OF MEASURING AND
SPECIFYING THE PERFORMANCE -
Part 3: Amplifiers
1 General
1.1
Scope
This part of IEC 1305 applies to household high-fidelity audio amplifiers of all types. It also
applies, except where stated, to equipment having multiple functions, including audio
amplifying functions. It is intended to be read in conjunction with IEC 1305-1*.
1.2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this part of IEC 1305. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
agreements based on this part of IEC 1305 are encouraged
...