NAIM NDX User Manual
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NAIM NDX User Manual

Naim ndx network audio player
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Download this manual See also: Reference Manual, Manual
Naim Audio Ltd · Southampton Road · Salisbury · Wilts · SP1 2LN · England
Objective
To design an upgradeable network audio player that is sonically comparable to a high-end CD player.
Power
OFF
Network
ON
AC ONLY
FUSE RATING:
ANTISURGE
FREQUENCY:
50/60Hz
100-120 V:
T4AL.
INPUT POWER: 60VA
220-240 V:
T2AL/250V.
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.
Copyright Naim Audio 2010
Naim NDX Network Audio Player
DesigN, eNgiNeeriNg AND TechNology
By Gary Crocker and Hjalmar Nilsson September 2010
Aerial
Wi-Fi
Contains Transmitter Module
FCC ID: D6XWL5011S
Control
RS232
remote
remote
remote
in
out 1
out 2
NDX
DESIGNED AND MADE IN ENGLAND BY
NAIM AUDIO LTD.
SOUTHAMPTON ROAD, SALISBURY
S/No.
N17079
Z180
CONFORMS
TO EN 60065
WARNING:
Digital Inputs
DISCONNECT SUPPLY CORD
3
2
1
BEFORE OPENING
ATTENTION:
DEBRANCHER AVANT DíOUVRIR
WARNING:
THIS APPARATUS MUST BE EARTHED
PLEASE READ THE MANUAL BEFORE USE
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.
play
ok
list
stop
Power Supply Upgrade
Analogue Outputs
REFER TO OWNERS MANUAL
Fit NDX linkplug or PSU upgrade
L
RCA
R
ch.1
Digital Output
ch.2
Signal
Ground
Floating
Chassis
Page 1 of 8
input
exit
DIN
-ve

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Summary of Contents for NAIM NDX

  • Page 1 DesigN, eNgiNeeriNg AND TechNology By Gary Crocker and Hjalmar Nilsson September 2010 Naim Audio Ltd · Southampton Road · Salisbury · Wilts · SP1 2LN · England Objective To design an upgradeable network audio player that is sonically comparable to a high-end CD player.

  • Page 2: Upnp Servers

    Good engineering techniques and principles development Naim has tested many UPnP™ servers and were utilised to realise this goal with the NDX, as with all we have written our own UPnP™ server for Naim’s own Naim products, but this project posed some new and server products.
  • Page 3 Control Protocol) stream for transport across the network. In this way the maximum isolation is achieved between The NDX accepts this TCP stream, unpacks it and buffers digital sources and analogue output. Power supplies for the data in memory. This buffering takes up the inevitable...
  • Page 4 DAC chip (red trace). Sample rate is 48kHz unprocessed DAC output (red trace). Note that the peak in the green trace at 1kHz overlays an equivalent peak in the red trace. Sample rate is 48kHz Copyright Naim Audio 2010 Page 4 of 8...
  • Page 5 2 (binary) rather than base 10 representation, but the structure is the same.) Digital filtering using Naim algorithms If we insert 15 zeros between each pair of input samples In reality it is very hard to estimate the resulting precision as the first stage of 16x oversampling, the frequency using floating point numbers.

  • Page 6: Master Clock

    But poor printed circuit board (PCB) layout can introduce power supply noise even when a regulator is used. The NDX PCB has six layers and is laid out such that circulating currents are kept local. All decoupling capacitors are connected with short, wide tracks to ensure low impedance and less HF noise on the power supply lines.
  • Page 7 The master clock in the NDX is a mains noise is low. The NDX transformer has four isolated VCXO controlled by two 9-bit DACs connected to its control secondary windings, feeding four sets of rectifiers and line to give 10-bit resolution (1024 discrete steps).

  • Page 8: Gapless Playback

    All high speed traces are measured and resistively damped accordingly to ensure that digital A single S/PDIF output is provided on the NDX via a BNC signal edges are not subject to ringing since ringing connector, chosen for best sound quality and impedance radiates high frequency electromagnetic energy that matching.

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