Naim Audio UnitiLite - Manual (Page 6)

4
Installation and Connection
2.4.2 Audio Signal Outputs
UnitiLite provides a preamplifier output intended for
connection to an upgrade or second power amplifier, or
a subwoofer. The output is taken after the Unitilite volume
and balance controls so a power amplifier or subwoofer
connected to it will respond to volume and balance
changes. The output always reflects the selected UnitiLite
input. Connection to the preamplifier output is made
via a 4-pin DIN socket. Your local Naim retailer will be
able to supply appropriate cables for power amplifier or
subwoofer connection if necessary.
2.5 Speaker Outputs
A set of stereo speaker connection sockets is provided on
the UnitiLite 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
UnitiLite is fitted on its front panel with a 3.5mm stereo
headphone socket. Insertion of a headphone plug will
mute the speaker outputs.
Note : UnitiLite controls and stores volume settings
separately for headphones and speakers.
2.7 Signal Ground Switch
UnitiLite is fitted on its rear panel with a Signal Ground
switch offering two positions: Chassis or Floating . Select
the Chassis position unless UnitiLite 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 UnitiLite 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
UnitiLite is fitted with a front panel USB interface intended
for the connection of Apple iPod and iPhone models and
USB memory sticks carrying audio files. The USB interface
should not be used for any other purpose.
Note: Most UMS (Universal Mass Storage) USB devices are
compatible with the NaimUniti 2 and UnitiLite USB audio
inputs. Such devices might include portable digital music
players, smart-phones, tablet computers, USB memory
sticks and memory card readers. Non UMS USB devices
such as older MP3 players may be connected to the
NaimUniti 2 and UnitiLite front panel audio input using a
3.5mm stereo jack cable from their headphone sockets.
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
UnitiLite is fitted on its rear panel with a standard RJ45
Ethernet socket. This socket enables UnitiLite 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.
Note: 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.
2.9.2 Wireless Network Connection
If UnitiLite is to connect wirelessly to the home network the
supplied Wi-Fi antenna must be fitted to the rear panel
wireless antenna socket. Wireless configuration will also
be necessary before UnitiLite is able to connect to the
network. See Section 4.6.1 of this manual.