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Copyright Naim Audio 2010

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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

ok
list

AC ONLY
FREQUENCY:      50/60Hz
INPUT POWER:   60VA

FUSE RATING:     ANTISURGE
100-120 V:            T4AL.
220-240 V:            T2AL/250V.

ON

OFF

Power

Power Supply Upgrade

Analogue Outputs

DIN

L

R

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

in

RS232

Control

remote

out 1

remote

out 2

Digital Output

Signal

Ground

Digital Inputs

2

1

3

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.

Summary of Contents for NDX -

Page 1: ...alogue Outputs DIN L R Chassis Floating RCA CONFORMS TO EN 60065 N17079 Z180 S No WARNING DISCONNECT SUPPLY CORD BEFORE OPENING ATTENTION DEBRANCHER AVANT D OUVRIR WARNING THIS APPARATUS MUST BE EARTH...

Page 2: ...rd drive or from music files found on the network The HDX scans the network to find playable media which are then added to the database and can be played By contrast the NDX uses the UPnP network prot...

Page 3: ...ations in network latency which could otherwise cause audible clicks and pops or even drop outs From this buffer located immediately after the Streamer Module the data is clocked out to the DSP as a d...

Page 4: ...t everything above half the sample rate Then only those frequency components that were present in the original signal are left This requires a very steep low pass filter Achieving adequate performance...

Page 5: ...same resolution as the incoming audio The normal solution is to use 32 bit floating point processing instead but in 32 bit IEEE floating point arithmetic the mantissa is 24 bits long so if we have sam...

Page 6: ...he same amount So the NDX s master clock has been designed to oscillate with extremely low noise There are many types of clock frequency instability with many different causes but by careful design th...

Page 7: ...len Key and multiple feedback low pass filters are used to implement the seven pole filter The highest quality through hole components are used in the signal path rather than surface mount equivalents...

Page 8: ...ng as wide and short as possible since every millimetre of PCB trace length has a significant effect when clock signals are at 24MHz with nanosecond rise times All high frequency traces are sandwiched...

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