I.S. EN 54-24:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
  3.1 Terms and definitions
  3.2 Abbreviations
4 Requirements
  4.1 Compliance
  4.2 Frequency response limits
  4.3 Durability
  4.4 Construction
      4.4.1 Provision for external conductors
      4.4.2 Materials
      4.4.3 Enclosure protection
      4.4.4 Access
  4.5 Marking and data
      4.5.1 Marking
      4.5.2 Information in the product data sheet
5 Tests
  5.1 General
       5.1.1 Atmospheric conditions for tests
       5.1.2 Operating conditions for tests
       5.1.3 Mounting arrangements
       5.1.4 Tolerances
       5.1.5 Frequency response measurement and sensitivity
             calculation
       5.1.6 Frequency response measurement and sensitivity
             calculation for loudspeakers requiring dedicated
             system equalization
       5.1.7 Provision for tests
       5.1.8 Test schedule
  5.2 Reproducibility
       5.2.1 Object of the test
       5.2.2 Test procedure
       5.2.3 Test requirements
  5.3 Rated impedance
       5.3.1 Object of the test
       5.3.2 Test procedure
       5.3.3 Test requirements
  5.4 Horizontal and vertical coverage angles
       5.4.1 Object of the test
       5.4.2 Test procedure
       5.4.3 Test requirement
  5.5 Maximum sound pressure level
       5.5.1 Object of the test
       5.5.2 Test procedure
       5.5.3 Test requirements
  5.6 Rated noise power (durability)
       5.6.1 Object of the test
       5.6.2 Test procedure
       5.6.3 Test requirement:
  5.7 Dry heat (operational)
       5.7.1 Object of the test
       5.7.2 Test procedure
       5.7.3 Test requirements
  5.8 Dry heat (endurance)
       5.8.1 Object of the test
       5.8.2 Test procedure
       5.8.3 Test requirements
  5.9 Cold (operational)
       5.9.1 Object of the test
       5.9.2 Test procedure
       5.9.3 Test requirements
  5.10 Damp heat, cyclic (operational)
       5.10.1 Object of the test
       5.10.2 Test procedure
       5.10.3 Test requirements
  5.11 Damp heat, steady state (endurance)
       5.11.1 Object of the test
       5.11.2 Test procedure
       5.11.3 Test requirements
  5.12 Damp heat, cyclic (endurance)
       5.12.1 Object of the test
       5.12.2 Test procedure
       5.12.3 Test requirements
  5.13 Sulfur dioxide (SO[2]) corrosion (endurance)
       5.13.1 Object of the test
       5.13.2 Test procedure
       5.13.3 Test requirements
  5.14 Shock (operational)
       5.14.1 Object of the test
       5.14.2 Test procedure
       5.14.3 Test requirements
  5.15 Impact (operational)
       5.15.1 Object of the test
       5.15.2 Test procedure
       5.15.3 Test requirements
  5.16 Vibration, sinusoidal (operational)
       5.16.1 Object of the test
       5.16.2 Test procedure
       5.16.3 Test requirements
  5.17 Vibration, sinusoidal (endurance)
       5.17.1 Object of the test
       5.17.2 Test procedure
       5.17.3 Test requirements
  5.18 Enclosure protection
       5.18.1 Object of the tests
       5.18.2 Enclosure of the loudspeaker
       5.18.3 Test procedures
       5.18.4 Test requirements
Annex A (normative) Acoustical measurements
Annex B (normative) Measuring rated noise power (durability)
Annex C (informative) Loudspeaker references
Annex ZA (informative) Clauses of this European Standard
         addressing the provisions of the EU Construction
         Products Directive (89/106/EEC)