Naim-audio NAC-N 172 XS User Manual Page 39
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E37
37.1 General Connections Notes
The negative input and output connections are all
common. The mains earth should always be connected
regardless of what other equipment is used. This only
grounds the case and the electrostatic screen within the
transformer, and is not connected to the signal negative. In
order to avoid hum loops, the signal negative of the whole
system should be connected to the mains earth (ground) in
one place.
37.2 Protection Notes
If the amplifier’s external case reaches 70°C due to
prolonged running at high power, the mains supply will be
interrupted and the illuminated logo will switch off until
the amplifier has cooled down. This may take up to thirty
minutes.
37 Installation and Operation
The NAP 250 should be installed on a dedicated equipment stand intended for the
purpose and should be in its final location before connecting cables or switching on.
Switch on the source and preamplifier components, with the volume turned down, before
switching on the NAP 250. The NAP 250 power button is located on the front panel.
The NAP 250 is heavy and care should be taken when lifting or moving it. Make sure that
the surface it is to be placed on can support the full weight.
OPERATION OF THE AMPLIFIER’S THERMAL PROTECTION
SUGGESTS PROLONGED USE AT TOO HIGH A VOLUME LEVEL.
YOUR LOUDSPEAKERS MAY BE AT RISK IF THIS IS THE CASE. THE
VOLUME SHOULD BE REDUCED.
37.3 Loudspeaker Cable and Connectors
Only Naim Audio speaker cable should be used to connect
a loudspeaker to the output of the NAP 250. Custom Naim
Audio loudspeaker connectors are supplied to make the
connection and in order to comply with current European
safety regulations these should always be used.
DAMAGE TO THE AMPLIFIER MAY RESULT IF “HIGH DEFINITION”
CABLE OR ANY OTHER SPECIAL CABLE IS USED TO CONNECT
THE LOUDSPEAKERS.
Ensure when connecting speakers that they are “in phase”.
That is, the positive and negative connection orientation
at both the speaker and amplifier ends of the cable is the
same for both channels.
NAP 250 Power Amplifier
39 NAP 250 Specification
Power Output: 80 Watts per channel, 8Ω
Quiescent Consumption:
25VA
Voltage Gain:
+29dB
Input Impedance:
18kΩ
Frequency Response:
-3dB @ 2Hz and 65kHz
Dimensions (H x W x D):
87 x 432 x 314mm
Weight 15.8kg
Mains Supply:
100V, 115V or 230V, 50/60Hz
ch2
-ve
ch1
Input
mains input
and fuse
signal input
ch1(L) & ch2(R)
38 NAP 250 Connections
38.1 NAP 250 Rear
left
speaker
right
speaker
- 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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