NAIM NAP 500 - NAP 500; NAP 500 Installation and Operation

E3
NAP 500
4. NAP 500 Installation and Operation
The NAP 500 and NAP 500PS should be installed on a dedicated equipment stand intended for the purpose and should be
in their nal location before connecting cables or switching on. Switch on the source and preamplier components, with the
volume turned down, before switching on the NAP 500. The NAP 500 power button is located on the front panel of the NAP
500PS Power Supply.
Care should be taken when siting the NAP 500 to ensure that the top and bottom ventilation grids are not blocked.
The NAP 500 and NAP 500PS are very heavy and care should be taken when lifting or moving them. Make sure that the
surface they are to be placed on can support the full weight.
4.1 General Connections Notes
The mains earth (ground) should always be connected
regardless of what other equipment is used in conjunction
with Naim power ampliers. 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.
Note: Each channel of the NAP 500 is a “bridged”
amplier, so none of the speaker outlet sockets (+ or -)
are at earth potential. Avoid connecting mains powered
equipment such as electrostatic speakers, sub-woofers
and headphone energisers that do not have a oating
earth. No plug which is connected directly or indirectly to
earth potential should be attached to any speaker outlet
(+ or -).
4.2 Protection Notes
In the NAP 500 the fan speed is increased in response to
an increase in amplier dissipation. If the amplier reaches
70°C due to prolonged running at high level or to airow
being blocked, the output will be interrupted and the fan
will run at full speed until it has cooled down. This may take
a few minutes.
It is not necessary to switch the amplier o, but it may be
advisable to mute the preamplier or turn the volume down
to avoid surprises when it comes back on.
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.
4.3 Loudspeaker Cable and Connectors
Only Naim Audio speaker cable should be used to connect
a loudspeaker to the output of the NAP 500. 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 amplier ends of the cable is the same
for both channels.