BS 6840-15:1992

Committees responsible
National foreword
Foreword
1. Scope
2. Reference documents
Section one. Power supply
3. A.C. power supply voltages and frequencies
4. D.C. power supply voltages
5. Power supply feeding for microphones
Section two. Interconnections
6. Connections
7. Connectors
Section three. Marking
8. Marking
9. General purpose inputs
Section four. Preferred matching values
10. Matching of microphones and amplifiers
10.1 Microphones
10.2 Microphones with built-in amplifier
10.3 Power supply feeding for electret microphones fed
      over a separate conductor
10.4 Phantom supply system
10.5 A-B supply system
10.6 Polarity of the audiofrequency voltage
10.7 Input from microphone to computer (for example
      for a voice recognition system)
11. Matching of record playing units (pick-ups) and
      amplifiers
12. Matching of tuners and amplifiers
13. Matching of amplifiers and amplifiers
13.1 Pre-amplifiers and power amplifiers for household
      and sound reinforcement
13.2 For broadcast and similar line-amplifiers
14. Matching of magnetic tape recorders and amplifiers
14.1 Output
14.2 Current-fed input
14.3 Voltage-fed input
15. Matching of auxiliary equipment and amplifiers
15.1 Output
15.2 Input
16. Matching of loudspeakers and amplifiers
16.1 Single unit loudspeakers
16.2 Loudspeaker systems
16.3 Voltage (or power) matching of amplifiers and
      loudspeakers
16.4 Polarity of the sound pressure
17. Matching of headphones and amplifiers
17.1 Impedance-defined headphones
17.2 Voltage-defined headphones
18. Auxiliary passive elements
19. Analogue matching of digital audio sources and
      amplifiers for household and similar use
Annexes
Annex ZA (informative) Other international publications
         quoted in this standard with the references of
         the relevant European publications
National annex NA (informative) Cross-references