1 introduction, 1 the multi-mode radio, 2 the upnp™ audio interface – Naim Audio NDX User Manual
Page 3: 3 the usb/ipod interface, 4 the digital to analogue converter, Introduction

1
1.3 The USB/iPod Interface
NDX/5XS incorporates a front panel USB interface socket 
that enables audio files stored on USB memory devices 
and Apple iPod and iPhone models to be selected and 
played. 
The NDX/5XS is compatible with the iPod and iPhone 
models illustrated below.
1.4 The Digital to Analogue Converter
NDX/5XS incorporates a three input digital to analogue 
converter able to handle S/PDIF format digital audio at 
up to 24 bit and 192kHz resolution. The three DAC inputs 
comprise one coaxial BNC socket, one coaxial Phono 
socket and TosLink optical socket.
Introduction
1 Introduction
The NDX and ND5 XS (NDX/5XS) are highly capable network and digital audio players 
that will repay time and effort spent on installation and setup. We strongly recommend 
that you read this manual.
The NDX/5XS incorporates four distinct audio components, each routed to analogue 
or digital outputs intended for connection to an appropriate preamplifier input. Each 
component is introduced in the paragraphs below and subsequently described in full 
detail in Sections 5 to 8. The components are:
A Multi-mode Radio
A UPnP™ Audio Interface
A USB/iPod Audio Interface
A Digital to Analogue converter
Prior to the sections describing NDX/5XS components, Section 2 covers installation, 
Section 3 describes operation and Section 4 describes setup.
1.1 The Multi-mode Radio
The NDX/5XS multi-mode radio combines an internet 
radio (iRadio) player and an optional FM/DAB (Digital 
Audio Broadcasting) tuner. A total of 40 radio stations 
across all three modes can be stored as presets. In FM 
and DAB mode, stations are tuned by NDX/5XS scanning 
the respective transmission bands. In iRadio mode the 
NDX/5XS receives data streams and a list of available 
radio stations from a dedicated internet server. iRadio 
requires broadband internet access via a home network 
connection.
The NDX/5XS DAB module incorporates full broadcast 
and station display capabilities. The FM module is fully RDS 
(Radio Data System) capable. 
Note:
DAB and RDS broadcasts are not available in all
territories.
1.2 The UPnP™ Audio Interface
NDX/5XS can connect to a home network and play audio 
files stored on UPnP™ drives such as the Naim UnitiServe or 
on PC and Mac computers.
