Bedienungsanleitung Naim NAP 300 DR (Seite 5 von 16) (Englisch)

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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.

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