Owner's Manual

7
Inputs and Outputs on the Back
Wired inputs are selected using the Left Knob.
See Figure 6 on page 8.
Opcal
The Optical input allows a digital source to be
connected using a TOSLINK cable also known as an
“optical audio cable.” The internal digital-to-analog
converter (DAC) of the RS250 is able to process hi-
res digital audio up to 192kHz/24-bit. The RS250 DAC
will process standard format SPDIF PCM signals as
well as Dolby Digital and DTS encoded multi-channel
bit streams. Unsupported formats can result in strange
and/or unpleasant sounds.
For HDMI and Optical volume boost adjustments see
“HDMI and Optical Gain Adjustment” on page 12.
AUX
The AUX input accepts a 3.5mm
stereo male connector for analog
signals. This is also known as an
1/8 inch stereo mini plug, and is
the typical end used to connect
headphones to phones or similar
devices. This input can be used to
provide a wired connection to various music sources.
HDMI ARC (Connecng your TV)
The RS250 can receive audio via an HDMI cable from
ARC enabled televisions. Audio Return Channel (ARC)
can provide two way communication between units
allowing for volume control and lip-syncing functions
to ensure audio and video are perfectly matched.
This allows for more intelligent operation between
components as well as less cable clutter. Make sure
this feature is enabled in your TV’s setup menu.
The Lip Sync function is automatic with an ARC CEC
connection. Lip Sync can be controlled with the RS250
remote control and will enable adjustments of audio to
sync with accompanying video when CEC is disabled
or with the optical input.
The HDMI ARC input is designed to be used exclusively
with ARC compliant televisions. If the source is not
ARC compliant, use the optical connection for digital
sources.
For HDMI and Optical volume boost adjustments see
“HDMI and Optical Gain Adjustment” on page 12.
PHONO
The PHONO input accepts RCA connections
from a turntable to support vinyl record playback.
The RS250 is congured to support Moving Magnet
type phono cartridges. Use the ground lug to connect
the turntable/tonearm ground wire.
Data Output
The Data Output uses a 3.5mm
stereo male-to-male cable to
send control signals to connected
McIntosh source components.
For instance, a PLAY command
to a CD player can be sent using
a single remote control.
Trig Out (Power Control)
Trig Out uses a 3.5mm stereo
male to male cable to send on/
o signals to other connected
McIntosh components using
a 12-volt trigger signal. This
allows other components to
automatically power on and o
when the RS250 does the same.
Service
This blocked USB port is only for service by qualied
persons, and is not intended for USB device support or
playback.
Subwoofer Output
An external subwoofer can be connected using the
RCA jack. The subwoofer will receive a line level mono
signal. RS250 lters will automatically be optimized
for integration with an external Subwoofer when
connected and volume will track accordingly. Use the
Subwoofer’s sensitivity adjustment to set the initial
level. A crossover setting of 100Hz is suggested.
Left
Ground
Right
Figure 3– 3.5mm
Plug for AUX Input
Figure 5– 3.5mm
Plug for Power Control
Power
Control
Ground
N/C
Figure 4– 3.5mm Plug
for Data Output
Data
Signal
N/C
Data
Ground