IEC 60268-5:2003/AMD1:2007

IEC 60268-5 ®
Edition 3.0 2007-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Sound system equipment –
Part 5: Loudspeakers
Equipements pour systèmes électroacoustiques –
Partie 5: Haut-parleurs
IEC 60268-5:2003/A1:2007
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IEC 60268-5 ®
Edition 3.0 2007-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Sound system equipment –
Part 5: Loudspeakers
Equipements pour systèmes électroacoustiques –

Partie 5: Haut-parleurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX D
ICS 33.160.50 ISBN 978-2-8322-0774-1

– 2 – 60268-5 Amend. 1  IEC:2007
FOREWORD
This amendment has been prepared by IEC technical committee 100: Audio, video and
multimedia systems and equipment.
This bilingual version (2013-08) corresponds to the monolingual English version, published in
2007-07.
The text of this amendment is based on the following documents:
CDV Report on voting
100/1189/CDV 100/1245/RVC
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The French version of this amendment has not been voted upon.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
Page 13
Replace the existing Clause 14 by the following new Clause 14:
14 Marking of terminals and controls
14.1 General
The terminals and controls shall be marked in accordance with IEC 60268-1 and IEC 60268-2
by the following principles.
14.2 Positive terminal
14.2.1 Characteristic to be specified
The terminal of a drive unit (see Note 1 in Clause 1), to which the application of a positive
voltage with respect to the other terminal results in an increase of sound pressure at the front
of the drive unit shall be specified as the positive terminal.
14.2.2 Marking
The positive terminal shall be marked with a + symbol, or a red marking, or in a way stated by
the manufacturer.
60268-5 Amend. 1  IEC:2007 – 3 –
14.2.3 Method of test
Apply a positive d.c. voltage briefly to the terminal marked as positive. Examine the change
of sound pressure at a point close to the front of the drive unit. Correct marking is confirmed
by an increase of sound pressure.
NOTE 1 The increase of sound pressure is produced by a positive excursion, i.e., the loudspeaker diaphragm
coming closer to the microphone.
NOTE 2 Any other method which produces the same result as the method described above can be used.
Page 17
17 Input voltage
Add the following new subclause:
17.1.3 Listening test for normal operation
A listening test for normal operation may be conducted according to Annex D.
Add, on page 19, the following new subclause:
17.4.3 Listening test for mechanical noise (rattles)
A listening test for mechanical noise (rattles) may be conducted according to Annex D.
Page 45
Annex B – Standard measuring enclosure type B
Replace, on page 46, the existing Table B.1 by the following new Table B.1:
Table B.1 – Dimensions and ratios of scalable enclosure type B
Enclosure dimensions Symbol Ratios
Width internal Wi 1
external We NA
Height internal Hi 1,202
external He NA
a
Depth 1 internal D1i
1,274
external D1e
NA
a
Depth 2 internal D2i
1,596
external D2e
NA
Radius R 100 mm
b
> 24 mm (Vn ≥ 100)
Panel thickness
b
> 18 mm (V < 100)
...