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NDX -
User Manual

NAIM NDX - User Manual

Other manuals for NDX -: Manual, Quick Start Manual, Specification, Reference Manual, Quick Start Manual

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Functionality

Naim’s NDX is an audio source product that integrates

network streaming, internet radio, iPod digital, replay from

USB memory stick and an optional DAB/FM tuner all in

one box. It also has three S/PDIF inputs (two transformer-

isolated coaxial inputs and one buffered optical input) for

the connection of other digital sources.

Naim NDX Network Audio Player

DesigN, eNgiNeeriNg AND TechNology

By Gary Crocker and Hjalmar Nilsson September 2010

Naim Audio Ltd · Southampton Road · Salisbury · Wilts · SP1 2LN · England

exit

input

stop

play

list

AC ONLY

FREQUENCY: 50/60Hz

INPUT POWER: 60VA

FUSE RATING: ANTISURGE

100-120 V: T4AL.

220-240 V: T2AL/250V.

OFF

Power

Power Supply Upgrade

Analogue Outputs

DIN

Chassis

Floating

RCA

CONFORMS

TO EN 60065

N17079

Z180

S/No.

WARNING:

DISCONNECT SUPPLY CORD

BEFORE OPENING

ATTENTION:

DEBRANCHER AVANT DíOUVRIR

WARNING:

THIS APPARATUS MUST BE EARTHED

DESIGNED AND MADE IN ENGLAND BY

NAIM AUDIO LTD.

SOUTHAMPTON ROAD, SALISBURY

NDX

PLEASE READ THE MANUAL BEFORE USE

ch.1

ch.2

-ve

Wi-Fi

Aerial

Network

remote

RS232

Control

remote

out 1

remote

out 2

Digital Output

Signal

Ground

Digital Inputs

Contains Transmitter Module

FCC ID: D6XWL5011S

REFER TO OWNERS MANUAL

Fit NDX linkplug or PSU upgrade

Objective

To design an upgradeable network audio player that is sonically comparable to a high-end CD player.

As standard the NDX is controlled either via the front

panel display and buttons or by the supplied remote

control. With purchase of the Naim n-Stream application

full functional control is available via hand-held devices

such as the Apple iPad or iPod Touch.

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Summary of NDX -

Page 1
Copyright naim audio 2010 page 1 of 8 functionality naim’s ndx is an audio source product that integrates network streaming, internet radio, ipod digital, replay from usb memory stick and an optional dab/fm tuner all in one box. It also has three s/pdif inputs (two transformer- isolated coaxial inpu...
Page 2
Copyright naim audio 2010 page 2 of 8 network streaming using the upnp™ network protocol the ndx plays music stored on a hard drive across a standard ethernet network. With today’s trend of downloading or ripping music to hard drives the ability to achieve audiophile sound quality from music data st...
Page 3
Copyright naim audio 2010 page 3 of 8 digital audio data source is isolated from the dsp and, in turn, the dsp is isolated from the master clock and dac. In this way the maximum isolation is achieved between digital sources and analogue output. Power supplies for each section of the signal path are ...
Page 4
Copyright naim audio 2010 page 4 of 8 closely enough matched to the incoming data rate. To cope with this eventuality we have also implemented, as a backup, an asynchronous sample rate converter (asrc) that will accept any sample rate from 32khz –10% to 192khz +10%. Oversampling and analogue filteri...
Page 5
Copyright naim audio 2010 page 5 of 8 fortunately there is a smarter way of generating the new samples. First we ‘zero stuff’ the digital signals – in other words, insert the required extra samples but give them all a value of zero. When we do the result is a waveform and spectrum like those shown a...
Page 6
Copyright naim audio 2010 page 6 of 8 when it comes to choosing how to implement the low- pass filter, it is all a matter of taste and how well you can implement the method you choose. Having listened to iir (infinite impulse response) and fir (finite impulse response) implementations of filters wit...
Page 7
Copyright naim audio 2010 page 7 of 8 vcxos are a good solution too but since a vcxo’s output frequency is controlled by a voltage, if noise is present on the control line then the vcxo’s output will exhibit phase noise. Normally the control line to the vcxo is feed via a pll which means that it is ...
Page 8
Copyright naim audio 2010 page 8 of 8 analogue stage filter capacitors that work in the audible band are prone to microphony, so susceptible components are lifted from being in direct contact with the board to minimise this effect. Pcb design for digital circuits is as critical to performance as it ...