PIMA IT7.402 : 0

Foreword
1 Scope
2 Normative references
SECTION 1: POWER SUPPLY
3 AC power supply voltages and frequencies
4 DC power supply voltages
5 Power supply device for microphone
SECTION 2: INTERCONNECTIONS
6 Connections
7 Connectors
SECTION 3: MARKING
8 Marking
9 General purpose inputs
SECTION 4: PREFERRED MATCHING VALUES
10 Matching of microphones and amplifiers
10.1 Microphones (except piezo-electric types)
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 Loudspeakers 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
Figures

Preferred electrical values for the interconnection of sound system components applies in this standard. NOTE: A diagram showing possible audio interconnections, with cross-references to the appropriate clauses, is given in figure 1.