naim NPX 300 Power Supply User Guide

User Guide
300 SERIES
POWER SUPPLY – NPX 300

Introduction

Note: Full safety warnings can be found in the Statutory Safety Manual.
Naim Audio products are conceived with performance as the top priority. Careful installation will help ensure that their full potential is achieved. This manual covers the 300 Series Power Supply. It begins with some general installation notes. Product specific information begins in Section 4.

What’s in the box

Features and Connections

Set Up

Place the NPX 300 and the source component in their final locations.

Ensure the mains lead is removed from the source component.

Remove the link plugs from the source component.

Connect the Type 4 cable between the NPX 300 and the source component. The end with cable direction marker should be connected to the source component.

Next connect the Type 3 cable between the NPX 300 and the source component. The end with cable direction marker should be connected to the source component.

Finally connect the mains lead to the NPX 300 only.

Now the source component can be turned on by pressing the NPX 300 standby button. If the NPX 300 is powering a source component capable of doing so pressing its standby button will also switch the units on.

Installation and Operation

The NPX 300 performs best when installed on a dedicated equipment stand such as the Naim Fraim and should be in its final location before connecting cables or switching on. If upgrading your system with a power supply, ensure that preamplifiers and power amplifiers are switched off before connecting the power supply. The NPX 300 standby button is located on the front panel and will perform the same function as the standby button on a connected 200 or 300 Series Naim product.
The NPX 300 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.

1. Installation ­ Type 3 And Type 4 Devices
   The NPX 300 is a new design of power supply, able to be connected to any 200 Series or 300 Series Naim Audio source product. The NPX 300 supports operation of a low power, <0.5W standby mode and network standby mode with these products. Logo brightness is also synchronised from the connected device.
   To install, power off your 200 Series or 300 Series product and remove both the link plugs.
   Connect the Type 3 and Type 4 cables supplied with the NPX 300 to the device. Ensure the end of the cable marked with one or two bands is connected to the source unit to maintain the cable directionality.
   Remove the power cable from the source device.
   The NPX 300 can now be connected to the mains and powered up. Only the NPX 300 requires a mains power connection, the product it is connected to no longer requires a mains connection.

2. Installation ­ Type 2 Devices
   The NPX 300 is capable of powering Naim Audio source products featuring a Type 2 connection, such as the Solstice Series NVS TT turntable. The Type 2 cable supplied with the Solstice turntable can be connected to the Type 3 output on the NPX 300. Logo brightness is synchronised from the source device.
   To install, power off your Type 2 product and remove the Type 2 cable from the supplied power supply. Connect the Type 2 cable to the Type 3 output on the NPX 300.
   The NPX 300 can now be connected to the mains and powered up.

3. Installation – Legacy Mode
   The NPX 300 is capable of powering some Naim Audio products that are also compatible with the XPS power supply. In this scenario, the standby button on the NPX 300 will turn the source device off completely. Special adaptor cables available from Naim Audio will be required to connect these devices.
   Logo brightness synchronisation is not supported in this configuration and the connected product is not capable of entering network standby.
   To install, power off your source product and remove the link plugs. Connect the Type 3 and Type 4 adaptor cable to the device.
   The NPX 300 can now be connected to the mains and powered up. Only the NPX 300 requires a mains power connection, the product it is connected to no longer requires a mains connection.

4. Brightness Settings
   The brightness of the product logo on the NPX 300 can be adjusted using the push button on the rear panel. If the NPX 300 is being used in Legacy Mode repeated short presses will cycle through the logo brightness levels. Pressing the button for about 3 seconds will cause the NPX 300 to do a factory reset.
   If the NPX 300 is powering a source component capable of doing so the brightness will be controlled by the source.

5. USB Update
   The NPX 300 power supply has a micro USB terminal for service use only.

General Installation

Naim equipment is designed to offer the finest performance possible avoiding compromise wherever practical. This can lead to circumstances that may be unfamiliar. The notes that follow contain advice specifically related to Naim equipment as well as more general warnings about the use of domestic audio products. Please read them carefully.

1. Sitting The Equipment
   In order to reduce the risk of hum audible from the loudspeakers, power supplies and power amplifiers should be located a reasonable distance away from other equipment. The maximum separation distance for connected equipment is that allowed by the standard interconnect lead.
   Some Naim equipment is extremely heavy. Check the weight of the equipment prior to lifting and if necessary use more than one person so that it can be moved safely. Ensure that your equipment rack or table can easily support the weight and is stable.

2. Switching On
   Source components and power supplies should be switched on before the power amplifiers. Always switch amplifiers off and wait a minute before connecting or disconnecting any leads. Always use standby button on the product rather than a mains outlet switch.

3. Running In
   Naim equipment takes a considerable time to run in before it performs at its best. The duration varies, but under some conditions the sound may continue to improve for over a month. Better and more consistent performance will be achieved if the system is left switched on for long periods.

4. Radio Interference
   In some circumstances, depending on where you live and the earthing arrangements in your home, you may experience radio frequency interference. Controls on broadcasting in some territories allow very high levels of radio frequency radiation and both the choice and exact siting of equipment may be critical. Susceptibility to radio frequency interference is related to the wide internal bandwidth necessary for high sound quality.

5. Lightning Precautions
   Your Naim hi-fi system can be damaged by lightning and should be turned off and disconnected from the mains when there is risk of lightning strike. For complete protection all mains plugs and any aerial cables should be disconnected when not in use.

Mains Power

Use only the mains leads and plugs supplied or the Naim Power-Line mains cable.
Where fused plugs are used 13 amp fuses should be fitted. Do not wire voltage dependent resistors or noise suppressors into mains plugs. They degrade the mains supply and the sound.

1. Mains Plug Wiring
   In some territories a mains plug may need to be fitted to the supplied mains lead. As the colours of the wires in the mains lead may not correspond with the coloured markings identifying the terminals in the plug proceed as follows:
   The wire coloured GREEN-AND-YELLOW must be connected to the terminal in the plug marked by the letter E or by the safety earth symbol or coloured GREEN or GREEN and YELLOW.
   The wire coloured BLUE must be connected to the terminal in the plug marked with the letter N or coloured BLACK.
   The wire coloured BROWN must be connected to the terminal in the plug marked with the letter L or coloured RED.

2. Equipment Fuses
   Mains powered Naim Audio equipment is fitted with a mains fuse on the rear panel adjacent to the mains input socket. Replace it if necessary only with the spare fuse supplied or with an identical fuse. Repeated failure of the fuse points to a fault that should be investigated by your retailer or Naim itself.

3. Non-rewirable Mains Plugs
   If a non-rewirable plug is cut from a mains lead (for whatever purpose) the plug MUST be disposed of in a way to render it totally useless. Considerable shock hazard exists if the cut-off plug is inserted into a mains outlet.

4. Mains Circuits and Cables
   A hi-fi system usually shares a mains circuit with other household equipment some of which can cause distortion of the mains waveform. This distortion can in turn lead to mechanical hum from mains transformers. Some Naim transformers are large in size, making them relatively sensitive to such distortion, and it may be necessary to take account of transformer hum when siting your equipment.
   Transformer hum is not transmitted through the speakers and has no effect on the performance of the system; however, a separate mains circuit may reduce it. Such a circuit (ideally with a 30 or 45 Amp rating) will also generally improve system performance. Advice on the installation of a separate mains circuit should be sought from a qualified electrician.

Cleaning

Naim recommend using only the supplied cleaning cloth to lightly dust any product surfaces. Cleaning products may contain ingredients that can adversely affect cosmetic surface treatments and coatings.

Support

Consumer protection varies from country to country. In most territories a retailer must be prepared to take back any equipment they have sold if it cannot be made to work satisfactorily. A problem may be due to a fault in the system or its installation, so it is essential to make full use of your dealer’s diagnostic skills. Please contact your local distributor, or Naim Audio directly, if any difficulties cannot be resolved.
Some Naim equipment is made in special versions for different territories and this makes it impracticable to arrange international guarantees. Please establish the local guarantee arrangements with your retailer. Contact Naim Audio directly for help and advice if necessary.

1. Service and Updates
   It is essential that repairs and updates are only carried out by an authorised Naim retailer or at the factory by Naim itself. Many components are custom made, tested or matched and appropriate replacements are often unobtainable from other sources.
   Direct contact to Naim for service or update information should be made initially through Customer Services:

Tel: +44 (0)1722 426600
Email: info@naimaudio.com

Please quote the product serial number (found on its rear panel) in all correspondence.

Power Supply Connection Details

The NPX 300 power supply is capable of upgrading any Naim product featuring a Type 2, Type 3 or Type 4 connector. Products with Type 3 and Type 4 connectors should have both cables attached to them after the link plugs have been removed.

1. Type 3: 12 way connector

2. Type 4: 23 way connector
   

Specifications

Product Recycling

Products that display the crossed-out wheeled bin logo cannot be disposed of as domestic waste. These products must be disposed of at facilities capable of re-cycling them and appropriately handling any waste by-products.
Contact your local authority for details of the nearest such facility. Appropriate recycling and waste disposal helps conserve resources and protects the environment from contamination.

Naim Audio Ltd. Southampton Road, Salisbury, UK SP1 2LN
Call. +44 (0) 1722 426600 Email. info@naimaudio.com
naimaudio.com

Designed in the UK
by Naim Audio

References

• British High-End Audio | Naim Audio

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