Naim Audio NaimUniti 2 - Manual (Page 5)

3
NaimUniti 2 Installation and Connection
2.4.2 Audio Signal Outputs
NaimUniti 2 provides audio signal outputs for a variety of
applications. Connections to the outputs are made via the
socket types listed in the following table:
Output Type Socket
Preamp out Analogue stereo 4-pin DIN
Sub out 1
Analogue mono RCA phono
Sub out 2 Analogue mono RCA phono
Line out Analogue stereo RCA phonos
Note: The preamp output is intended for connection to an
upgrade or second power amplifier. The output is taken
after the NaimUniti 2 volume and balance controls so a
power amplifier connected to it will respond to NaimUniti 2
volume and balance control changes. The output always
reflects the selected input signal.
Note: The two subwoofer outputs are mono and unfiltered.
They are taken after the NaimUniti 2 volume control so
subwoofers connected to them will respond to NaimUniti
2 volume control changes. The outputs always reflect the
selected input signal and can be switched on or off in the
Speakers setup menu.
Note: The stereo line output is intended to be connected
to a recording device. It is taken before the NaimUniti 2
volume and balance controls so does not reflect volume
or balance control changes. The output always reflects the
selected input signal.
2.5 Speaker Outputs
A set of stereo speaker connection sockets is provided
on the NaimUniti 2 rear panel. Custom Naim Audio
loudspeaker connectors are supplied to make the
connection and in order to comply with current European
safety regulations these should always be used. Naim
Audio speaker cable will provide the best results, however,
a range of speaker cable types may be used without
risk of damage to the amplifier. Contact your local Naim
retailer for further advice. Use equal lengths of speaker
cable for each channel.
Ensure when connecting speakers that they are “in
phase”. That is, the positive and negative connection
orientation at both the speaker and amplifier ends of the
cable is the same for both channels.
2.6 Headphone Output
NaimUniti 2 is fitted on its front panel with a 3.5mm stereo
headphone socket. Insertion of a headphone plug will
mute the speaker outputs.
Note : NaimUniti 2 controls and stores volume settings
separately for headphones and speakers.
2.7 Signal Ground Switch
NaimUniti 2 is fitted on its rear panel with a Signal Ground
switch offering two positions: Chassis or Floating . Select
the Chassis position unless NaimUniti 2 is connected
in a hi-fi system incorporating another earthed source
component, or mains “hum” is audible through the
loudspeakers. Contact your retailer, distributor or Naim for
advice if necessary.
Note: “Connected” in the context above means an
analogue audio signal cable that includes an earth
connection.
Note: All Naim CD players are earthed so the Signal
Ground switch should be set to floating if one is connected
in the system.
No damage will be done if the wrong Signal Ground
position is chosen, however the system sound quality may
be compromised.
2.7.1 General Audio Connection Notes
The NaimUniti 2 negative analogue input and output
connections for each channel are common. The mains
earth (ground) should always be connected regardless of
what other equipment is used. The mains earth primarily
grounds the case and the electrostatic screen within the
transformer, and is only connected to the signal negative if
the
Signal Ground switch is set to Chassis . In order to avoid
hum loops, the signal negative of the whole system should
be connected to the mains earth in one place only.
2.8 USB/iPod Interface
NaimUniti 2 is fitted with a front panel USB interface
intended for the connection of Apple iPod models and
USB memory sticks carrying audio files. The USB interface
should not be used for any other purpose.
Depending on the setup options chosen (see Section
4.3.6), iPod batteries will be charged when connected to
the USB interface.
2.9 Network Connections
2.9.1 Wired Network Connection
NaimUniti 2 is fitted on its rear panel with a standard
RJ45 Ethernet socket. This socket enables NaimUniti 2
to join home networks via a network router to access
internet radio data streams or to play audio files stored on
appropriately configured UPnP™ servers.
Ethernet-over-mains hardware may be used and provides
a simple and convenient method of wired home network
connection. However, depending on mains wiring factors
specific to each home environment, the presence of
network data on the mains supply may compromise
overall system sound quality. If any sound quality
compromise is found to be unacceptable, dedicated
network cabling should be installed or wireless networking
should be employed.