Naim-audio NAC-N 172 XS User Manual Page 8
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NAC 252 Preamplifier
7 NAC 252 Introduction and Installation
The NAC 252 preamplifier does not incorporate an internal power supply and can be used
only in conjunction with the Supercap power supply. Diagram 8.3 illustrates connection of
the NAC 252 to its power supply.
The preamplifier and power supply should be installed on a dedicated equipment
stand intended for the purpose. Do not stand either directly on top of another item of
equipment. Care should be taken to ensure that the preamplifier is level.
The preamplifier and power supply should be installed in their final locations before
connecting cables or switching on. Ensure that power amplifiers are switched off and the
preamplifier volume is turned down before the power supply is switched on. The power
button is located on the power supply front panel.
The power supply is heavy and care should be taken when lifting or moving it. Make sure
that the surface on which it is to be placed can support its weight.
The following Section 7 paragraphs describe installation features and functions specific to
the NAC 252. Operational features common to all preamplifiers and integrated amplifiers
are described in Section 28.
7.1 Source Inputs and Record Outputs
The input selection buttons arranged along the upper bank
select the source signal to be routed to the power amplifier
and the loudspeakers. Below them, in the lower bank, are a
corresponding array of buttons which select the signal to be
routed to the preamplifier’s record outputs.
These separate source and record sections enable one
source (a CD player, for example) to be listened to whilst
the output from another (say, the tuner) is simultaneously
selected for recording.
Note: It is possible to lock the record controls and prevent
accidental de-selection during recording. Record-lock is
switched on or off by pressing the source mono button four
times within six seconds.
7.2 Input Socket Assignment
The NAC 252 has six DIN input sockets and two alternative
pairs of RCA Phono sockets. The RCA Phono sockets can be
assigned individually to the CD and AUX 2 input buttons in
place of the DIN sockets.
Input assignment setup is accessed through the NAC
252 program mode. To switch into (or exit from) program
mode press and hold the prog key on the remote handset
(in preamplifier mode). Program mode is indicated by a
flashing indicator on the front panel volume control and the
record selection indicators extinguishing.
Note: If no function is operated within five minutes of
entering program mode the NAC 252 will return to normal
mode automatically.
Once in program mode press and hold the remote handset
1 key to select or de-select the RCA Phono socket input for
CD, and the remote handset 6 key to select or de-select
the RCA Phono socket input for AUX 2. The corresponding
front panel input buttons can similarly be used to select or
de-select the RCA Phono socket inputs. The appropriate
input button indicator will flash three times on selection of
the RCA Phono option and once on selection of the DIN
option.
To exit from program mode press and hold the prog key on
the handset until the record select indicators are restored
and the volume indicator stops flashing.
8 NAC 252 Controls and Connections
8.1 NAC 252 Front
volume
balance
mute
mono
source
bank
record
bank
source and record
selection
Operational features
common to all
preamplifiers and
integrated amplifiers
are described in
Section 28
- OWNERS MANUAL 1
- PREAMPLIFIERS 1
- Contents 2
- Introduction 3
- NAC 552 Preamplifier 5
- NAC 252 Preamplifier 8
- NAC 282 Preamplifier 10
- NAC 202 Preamplifier 13
- NAC 152 XS Preamplifier 15
- 19.1.1 Analogue Inputs 19
- 19.1.2 Digital Inputs 19
- 20.1 SUPERNAIT Front 21
- 20.2 SUPERNAIT Rear 21
- 21 SUPERNAIT Specification 23
- NAIT XS Integrated Amplifier 24
- NAIT 5i Integrated Amplifier 28
- 28.9 Fault Conditions 32
- R-com Remote Handset 33
- NARCOM 4 Remote Handset 34
- NAP 500 Power Amplifier 35
- NAP 300 Power Amplifier 37
- NAP 250 Power Amplifier 39
- NAPV 145 Power Amplifier 40
- NAP 200 Power Amplifier 41
- NAP 155 XS Power Amplifier 42
- NAP 100 Power Amplifier 43
- Declarations of Conformity 44
- BEDIENUNGSANLEITUNG 45
- SICHERHEITSHINWEISE 46
- Einleitung 47
- Vorstufe NAC 552 49
- Vorstufe NAC 252 52
- Vorstufe NAC 282 54
- Vorstufe NAC 202 57
- Vorstufe NAC 152 XS 59
- Vollverstärker SUPERNAIT 63
- Vollverstärker NAIT XS 68
- Vollverstärker NAIT 5i 72
- 28.9 Fehleranzeigen 76
- Fernbedienung R-com 77
- Fernbedienung NARCOM 4 78
- Endstufe NAP 500 79
- Endstufe NAP 300 81
- Endstufe NAP 250 83
- Endstufe NAPV 145 84
- Endstufe NAP 200 85
- Endstufe NAP 155 XS 86
- Endstufe NAP 100 87
- Konformitätserklärung 88
- MANUEL D’UTILISATION 89
- PREAMPLIFICATEURS 89
- Table des Matières 90
- Préamplificateur NAC 552 93
- Préamplificateur NAC 252 96
- Préamplificateur NAC 282 100
- Préamplificateur NAC 202 101
- Préamplificateur NAC 152 XS 103
- 19.1.1 Entrées Analogiques 107
- 19.1.2 Entrées Numériques 107
- 19.5 Sorties Enceintes 108
- 19.6 Sortie Casque 108
- 19.4 Sorties Record 108
- 21 Spécifications SUPERNAIT 111
- Amplificateur Intégré NAIT XS 112
- Amplificateur Intégré NAIT 5i 116
- 28.9 Pannes 120
- Télécommande R-com 121
- Télécommande NARCOM 4 122
- 32 Raccordements du NAP 500 124
- 35 Raccordements du NAP 300 126
- 39 Spécifications NAP 250 127
- 41 Raccordements NAPV 145 128
- 42 Spécifications NAPV 145 128
- 44 Branchements NAP 200 129
- 45 Spécifications NAP 200 129
- 48 Spécifications NAP 155 XS 130
- 51 Spécifications NAP 100 131
- Déclarations de Conformité 132
- MANUALE DELL’UTENTE 133
- AMPLIFICATORI DI POTENZA 133
- ISTRUZIONI DI SICUREZZA 134
- Introduzione 135
- Preamplificatore NAC 552 137
- Preamplificatore NAC 252 140
- Preamplificatore NAC 282 142
- Preamplificatore NAC 202 145
- Preamplificatore NAC 152 XS 147
- 19.1.1 Ingressi analogici 151
- 19.1.2 Ingressi digitali 151
- 21. Specifiche di SUPERNAIT 155
- 22.2 Ingressi segnali 156
- 22.3 Uscite dei diffusori 156
- 22.5 AV Bypass 156
- 22.7 Alimentatori opzionali 157
- 23.1 NAIT XS anteriore 157
- 23.2 NAIT XS posteriore 158
- 24 Specifiche NAIT XS 159
- 25.1 Ingressi 160
- 25.2 Uscite 160
- 27. Specifiche di NAIT 5i 161
- 28.10 Tasti operativi 164
- 28.9 Condizioni di errore 164
- Telecomando R-com 165
- Telecomando NARCOM 4 166
- 31 Installazione e uso 167
- 32 Collegamenti di NAP 500 168
- 34 Installazione e uso 169
- 35 Collegamenti di NAP 300 170
- 37 Installazione e uso 171
- 39 Specifiche di NAP 250 171
- 38 Collegamenti di NAP 250 171
- 40 Installazione e uso 172
- 42 Specifiche di NAPV 145 172
- 41 Collegamenti di NAPV 145 172
- 43 Installazione e uso 173
- 45 Specifiche di NAP 200 173
- 44 Collegamenti di NAP 200 173
- 46 Installazione e uso 174
- 48 Specifiche di NAP 155 XS 174
- 47 Collegamenti di NAP 155 XS 174
- 49 Installazione e uso 175
- 51 Specifiche di NAP 100 175
- 50 Collegamenti di NAP 100 175
- Dichiarazioni di conformità 176
- Part No. 12-001-0041 Iss. 6i 178
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