McCulloch RS250 User manual

McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: [phone] www.mcintoshlabs.com
RS250
Wireless Loudspeaker System
Owner’s Manual
Quick Start
is on page 4

2
Safety First
It is a smart idea to read all the enclosed RS250 SAFETY
INFORMATION included in separate documents; even
if you already know this stu, you can’t be too safe.
Here is some compliance information:
FCC Informaon (For US Customers)
1. IMPORTANT NOTICE:
DO NOT MODIFY THIS PRODUCT
This product, when installed as indicated in the
instructions contained in this manual, meets FCC
requirements. Modication not expressly approved by
McIntosh may void your authority, granted by the FCC,
to use the product.
2. CAUTION:
• To comply with FCC RF exposure compliance
requirement, separation distance of at least 20cm must be
maintained between this product and all persons.
• This product and its antenna must not be co-located
or operating in conjunction with any other antenna or
transmitter.
3. COMPLIANCE INFORMATION:
• Product Name: RS250 Wireless Loudspeaker System
• Model Number: RS250
• This product contains FCC ID:2AJYB-S810
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, NY 13903
Tel. [phone]
IC Informaon (Canadian Customers)
1. PRODUCT:
This product contains IC: 20504-S810
This product complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
(1) this product may not cause harmful interference, and
(2) this product must accept any interference received,
including interference that may cause undesired operation.
This Class B digital Apparatus complies with Canadian
ICES-003.
2. CAUTION:
To reduce potential radio interference to other users, the
antenna type and its gain should be so chosen that the
equivalent isotropically radiated power (e.i.r.p.) is not
more than that permitted for successful communication.
Informaons sur IC (pour les clients Canadiens)
1. APPAREIL:
Cet Appareil contiens IC: 20504-S810.
Cet Appareil est conforme à la norme CNR-210 du
Canada. L’utilisation de ce dispositif est autorisée
seulement aux deux conditions suivantes : (1) il ne doit pas
produire de brouillage, et (2) l’utilisateur du dispositif doit
être prêt à accepter tout brouillage radioélectrique reçu,
même si ce brouillage est susceptible de compromettre le
fonctionnement du dispositif. Cet Appareil numérique de
la classe B est conforme à la norme NMB-003 du Canada.
2. ATTENTION:
An de réduire le risque d’interférence aux autres
utilisateurs, il faut choisir le type d’antenne et son gain de
façon à ce que la puissance isotrope rayonnée équivalente
(p.i.r.e.) ne soit pas supérieure au niveau requis pour
l’obtention d’une communication satisfaisante.
Canadian Customers: CAN ICES-003 (B)/NMB-
003 (B)
RF Exposure Information
This equipment complies with FCC/IC radiation exposure
limits set forth for an uncontrolled environment and
meets the FCC radio frequency (RF) Exposure Guidelines
in Supplement C to OET65 and RSS-102 of the IC radio
frequency (RF) Exposure rules. This equipment has very
low levels of RF energy that are deemed to comply without
testing of specic absorption ratio (SAR).
Cet équipement est conforme aux normes d’exposition
aux radiations FCC/IC dénies pour un environnement
non contrôlé et satisfait les directives d’exposition à la
radiofréquence (RF) dans le supplément C des OET65 et
RSS-102 des règles d’exposition à la fréquence radio (RF)
IC. Cet équipement a de très faibles niveaux d’énergie RF
qui sont jugés conformes sans test de taux d’absorption
spécique (SAR).
RED (EN) Informaon
1. DECLARATION OF CONFORMITY
Our products follow the provisions of EC/EU
directives:
LVD: 2014/35/EU
EMC: 2014/30/EU
RED: 2014/53/EU
ERP: EC regulation 1275/2008 and its frame work
directive 2009/125/EU
RoHS: 2015/863/EU
2. IMPORTANT NOTICE:
DO NOT MODIFY THIS PRODUCT
This product, when installed as indicated in the
instructions contained in this manual, meets RED
directive requirements. Modication of the product could
result in hazardous Radio and EMC radiation.
3. CAUTION:
Separation distance of at least 20cm must be maintained
between this product and all persons.
This product and its antenna must not be co-located or
operating in conjunction with any other antenna or
transmitter.

3
Thank you from all of us at McIntosh
Your new RS250 Wireless Loudspeaker System is a
precision instrument that will provide many years of
enjoyment. Please take a few moments to familiarize
yourself with the features and instructions to get the
maximum performance from your equipment.
If you need further technical assistance, please contact
your dealer who may be more familiar with your
particular setup including other brands. You can also
contact McIntosh with additional questions or in the
unlikely event of needing service.
McIntosh Laboratory, Inc.
2 Chambers Street
Binghamton, New York 13903
Technical Assistance:
Phone: [phone]
Customer Service (for repairs):
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: mcintoshlabs.com
Make a Note
For future reference, you can jot down your serial
number and purchase information here. We can
identify your purchase from this information if the
occasion should arise. The serial number is located on
the back label of the RS250.
Serial Number:
Purchase Date:
Dealer Name:
Table of Contents
Safety First .............................. 2
FCC Information (For US Customers) ......... 2
IC Information (Canadian Customers) ......... 2
Thank you from all of us at McIntosh ......... 3
Make a Note ............................. 3
Trademark and License Information .......... 4
Quick Start (Bluetooth) .................... 4
More Connections......................... 5
AirPlay 2 ............................. 5
Wi-Fi connection using an iOS Device ...... 5
Ethernet .............................. 5
Setting up Wi-Fi Without Ethernet ......... 5
Chromecast ........................... 5
Note About Initial Network Connection . . . . . 6
Roon................................. 6
Tidal Connect.......................... 6
Spotify Connect ........................ 6
Qualcomm®aptX™ Audio ............... 6
Buttons and Switches on the Back ............ 6
Master Power Switch .................... 6
CEC Button ........................... 6
Inputs and Outputs on the Back .............. 7
Optical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AUX ................................. 7
HDMI ARC (Connecting to your TV) ...... 7
Data Output ........................... 7
Trig Out (Power Control)................. 7
Service ............................... 7
Subwoofer Output ...................... 7
Front View Labeled & Installing the Grille . . . . . .8
Remote Learning . . . . . . . . . . . . . . . . . . . . . . . . . .9
Changing the Remote’s Battery . . . . . . . . . . . . . . .9
Description of Remote Control Buttons . . . . . . .10
The Knobs and LEDs on the Front........... 10
The Right Knob ....................... 10
The Left Knob ........................ 10
Network/Wi-Fi Indicator LED ............11
Automatic Input Select ..................11
Sleep Mode LED . . . . . . . . . . . . . . . . . . . . . . .11
Input Indicators ........................11
Rear View Labeled ........................11
Rear Connections .........................11
Ethernet Port ..........................11
AC Connector .........................11
USB Service Port.......................11
HDMI and Optical Gain Adjustment ......... 12
The Browser Interface .................... 12
OVERVIEW Menu .................... 12
SETTINGS Menu ..................... 12
UPDATE Menu ....................... 14
Re-packing the RS250 .................... 15
Technical Specifications................... 15
List of Figures
Figure 1– Scan for bluetooth devices ......... 4
Figure 2– Ethernet connection .............. 5
Figure 3– 3.5mm Plug for AUX Input......... 7
Figure 4– 3.5mm Plug for Data Input ......... 7
Figure 5– 3.5mm Plug for Power Control ...... 7
Figure 6– Front View...................... 8
Figure 7– Installing the Grille............... 8
Figure 8– Sliding open the Remote ........... 9
Figure 9– Remote Control Diagram ......... 10
Figure 10– Rear View .....................11
Figure 11– OVERVIEW submenu........... 13
Figure 12– SETTINGS submenu............ 13
Figure 13– UPDATE submenu ............. 14
Figure 14– Packing Material ............... 15

4
Figure 1–
Scan for bluetooth devices
Trademark and License Informaon
The McIntosh RS250 incorporates copyright protected technology that is protected by U.S. patents and other
intellectual property rights. The RS250 uses the following Technologies:
Trademark Logo License Information
Use of the Works with Apple badge
means that an accessory has been
designed to work specifically with the
technology identified in the badge and
has been certified by the developer to
meet Apple performance standards.
Apple, iPad, iPad Air, iPad Pro, iPhone
and AirPlay are trademarks of Apple
Inc., registered in the U.S. and other
countries. To control this AirPlay 2–
enabled speaker, iOS 11.4 or later is
required.
The Bluetooth® word mark and logos
are registered trademarks owned by
Bluetooth SIG, Inc. and any use of
such marks by McIntosh Group, Inc.
is under license. Other trademarks and
trade names are those of their respective
owners.
Qualcomm aptX is a product of
Qualcomm Technologies, Inc. and/or its
subsidiaries.
Qualcomm is a trademark of Qualcomm
Incorporated, registered in the United
States and other countries. aptX is a
trademark of Qualcomm Technologies
International, Ltd., registered in the
United States and other countries.
The Wi-Fi CERTIFIED logo is a
registered trademark of the Wi-Fi
Alliance.
Wi-Fi Certification provides assurance that
the device has passed the interoperability
test conducted by the Wi-Fi Alliance, a
group that certifies interoperability among
wireless LAN devices.
Roon Ready network devices have Roon’s
streaming technology built in, and are
certified by Roon Labs to provide the
highest level of quality and performance
in network streaming.
Trademark Logo License Information
TIDAL is the first global music
streaming service with high fidelity
sound, hi-def video quality, along with
expertly curated playlists and original
content — making it a trusted source for
music and culture.
The Spotify software is subject to
third party licenses found here: https://
developer.spotify.com/esdk-third-party-
licenses. CONNECT UPDATE
Chromecast built-in is a trademark of
Google LLC.
HIGH-DEFINITION MULTIMEDIA INTERFACE
TM
The terms HDMI, HDMI High-
Definition Multimedia Interface, and the
HDMI Logo are trademarks or registered
trademarks of HDMI Licensing
Administrator, Inc.
For DTS patents, see http://patents.
dts.com. Manufactured under license
from DTS, Inc. DTS, the Symbol, DTS
and the Symbol together, and Digital
Surround are registered trademarks and/
or trademarks of DTS, Inc. in the United
States and/or other countries. DTS, Inc.
All Rights Reserved.
License Notice and Trademark
Acknowledgment: Manufactured under
license from Dolby Laboratories. Dolby,
Dolby Audio, and the double-D symbol
are trademarks of Dolby Laboratories.
Quick Start (Bluetooth)
Here are the basic steps to start enjoying the RS250
Wireless Loudspeaker System right away. This Quick
Start will get sound owing from the RS250 via a
Bluetooth connection. That way you can hear some
music as you read the rest of this manual.
• Connect to the RS250 to AC Power
• Power the RS250 On by pressing Rear Panel Power
Switch
• The BT above the Left Knob will Flash. If it is no
longer ashing, press and hold the Left Knob for
two seconds and then release
• On the phone (or other device) you wish to connect,
press SCAN in the Bluetooth section of Settings.
Generally, this is found in the Connections’ submenu
of settings (devices may vary)
Settings>Connections>Bluetooth
• The RS250 will appear as “RS250 xxxx”
in Available Devices. See Figure 1
• Choose the
RS250 to pair
• When asked to
conrm you want
to pair the RS250
to your device,
select OK
• The RS250
should now be
“Connected
for audio”
• Play some music

5
More Connecons
AirPlay 2
AirPlay 2 is an Apple technology designed to control
home audio systems and speakers in any room –
with a tap or by simply asking Siri – right from
iPhone, iPad, HomePod or Apple TV.
To control this AirPlay 2-enabled speaker, iOS 11.4
or later is required.
Multiroom Audio
AirPlay 2 technology lets you play a song on every
RS250 in your house at the same time or adjust the
volume in any room – all in sync.
After installing your RS250, add it to the Apple
Home App with a few simple steps using your
iPhone or iPad.
Siri Voice Control
Use Siri on your iPhone, iPad, HomePod, or Apple
TV to control your RS250 with just your voice.
Wi-Fi connecon using an iOS Device
Setting up the RS250 as a AirPlay Speaker will
connect the RS250 to your Wi-Fi network:
• Make sure your iOS device is on the Wi-Fi
network you wish to connect the RS250 to
• With the RS250 powered on, the LED
below the Left Knob should not be solidly
illuminated green (if it were lit, it would
indicate the RS250 is currently connected to a
network)
• Open up Settings on the iOS device
• Open up the Wi-Fi submenu
• Look at the Wi-Fi network list and nd “Set
Up New AirPlay Speaker”
• Select the RS250
• The RS250 will be added to your network
Ethernet
For a wired connection
to your network, use an
Ethernet cable to connect
the RS250 to your router.
See Figure 2.
Note: a solid red Network/
Wi-Fi LED indicates that a
network error has occured.
See “Network/Wi-Fi Indicator LED” on page 11.
Note that plugging in an ethernet cable will disable
the Wi-Fi radio of the RS250. The RS250 will use
the ethernet connection for all network activity. To
enable Wi-Fi, the ethernet cable must be removed.
With an ethernet connection, you can use the RS250
browser interface to provide the RS250 with your
Wi-Fi settings. For more information, see “The
Browser Interface” on page 12.
Seng up Wi-Fi Without Ethernet
To initially connect your RS250 to a Wi-Fi network
without using an ethernet connection or iOS
connection (as described above) follow these steps:
• Power the RS250 O and then On
• When the green LED below the Left Knob
is blinking, open your PC or phone’s Wi-Fi
Connection Settings
• Locate the RS250 in the list of available
networks and connect to it
• Open a web browser (Chrome or Firefox)
• Type 192.168.255.249 in the browser’s address
bar and open that page
• Select SETTINGS from the RS250 interface
(see Figure 12 on page 13)
• Select Wireless in Network Type
• Select Start Scan
• Select your network
• Provide your password and press Connect
• Your RS250 will connect to your network
Chromecast
To Cast to your RS250, you will need:
• The latest version of Google Home App
• Wireless network and access password
With your mobile device/tablet connected to the
same Wi-Fi network as your RS250 and the RS250
powered on:
• Open the Google Home App
• Follow the steps for the RS250 if they
automatically appear
To manually add the RS250
• Tap the +at the top of the screen
• Select “Set up device”
• Select “Setup new devices”
• Follow the set up steps for a “Speaker”
Once the RS250 is setup, you can choose to Cast to
it. To Cast:
• Choose the Cast button in the top right corner
of a Chromecast-enabled app
• Choose the RS250
• When connected the Cast button will change
colors
• Cast music, etc. to your RS250
Figure 2–
Ethernet connection

6
Buons and Switches on the Back
Master Power Switch
Looking at the rear of the RS250, the Master Power
Switch will be directly to the left of the AC Power Inlet
(Figure 10 on page 11). This switch will toggle power
to the RS250 ON (I) and OFF (O). With this switch in
the ON position, the RS250 can be put in Power Save
mode by pushing and holding the Front Right Knob for
2 seconds.
When the Master Power Switch is in the OFF position,
the RS250 will consume no power. Power Save/Standby
and the remote control will only function when the
Master Power Switch is in the ON position.
CEC Buon
Consumer Electronics Control (CEC) is a feature of
HDMI that theoretically allows users to control multiple
connected devices through one remote control. This
can work ne in some cases when you want to turn on
the television and also power on other related devices,
but there may be times when you do not want this or
other connected events to happen. You can use the CEC
Button to defeat this HDMI feature. Push in the button
to defeat. Push again to enable. If you have a control
system for your devices, you will want CEC defeated.
With CEC enabled, the RS250 can control a television’s
volume, mute and unmute as well as power functions
with compatible televisions. CEC will also ensure
correct decoding and lip syncing automatically.
To determine the current setting of CEC, press and hold
the CEC button for 2 seconds. The red LED above the
Right Knob will blink for 3 seconds if CEC is active
or remain solid for 3 seconds if not active. Holding the
CEC button for 4 seconds will toggle the setting as
indicated by the red LED.
Note About Inial Network Connecon
When your RS250 connects to your network for the
rst time, it will automatically look for the latest
software update. If available, the RS250 will install
the newest version. When updating, the Red LED
below the Right Knob will blink twice, pause and
repeat.
You may adjust how future updates are handled. See
“UPDATE Menu” on page 14.
Roon
When connected to your network, the RS250 will
be available as a Zone for your Roon server. (If you
have a Roon server.) The RS250 can be connected
to your Wi-Fi using AirPlay (see “Wi-Fi connection
using an iOS Device” on page 5) Chromecast
or other methods noted on page 5. It can also be
directly connected with an ethernet cable.
Tidal Connect
To listen to music on TIDAL through the RS250,
using the Tidal app, select the content you want to
play and then select the connect icon on the
Now Playing page.
This will bring up a list of nearby devices to stream
through. Locate the RS250 and select to pair.
If you are unable to nd your device, make sure the
device is connected to the same Wi-Fi network you
are streaming from.
Once paired you can use your TIDAL app as a
remote. TIDAL is compatible with select smart
assistants that enable voice controls. Depending on
your region, you may enable this feature by linking
your TIDAL account with your selected smart device.
This option can normally be found in the Settings
section of your respective Smart Devices app.
Spofy Connect
Use your phone, tablet or computer as a remote
control for Spotify. Go to spotify.com/connect to
learn how.
Qualcomm® aptX™ Audio
aptX™ is a codec that can provide CD quality
music over Bluetooth connections. The RS250
will automatically utilize aptX when connected to
a source that supports aptX. Simply connect with
Bluetooth as described in “Quick Start (Bluetooth)”
on page 4.
The RS250 also supports the higher resolution aptX
HD (24-bit/48kHz). If your device utilizes aptX HD
then that resolution will be utilized automatically.
The RS250 also features aptX LL (Low Latency)
which automatically ensures Bluetooth can deliver
sound in sync with visual media. It reduces
delay and improves end-to-end speed of the
audio transmission, resulting in a high quality,
synchronized user experience with any transmitting
device that supports aptX LL.

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 defeated
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

8
Front View Labeled
Installing the Grille
Figure 7– Installing the Grille
Figure 6– Front View
The RS250’s Grille can be installed by lining up the six plastic pegs on the
back of the Grille with the six holes framing the speakers of the RS250.
Gently push with even pressure to install and pull straight away from the
front to remove the Grille. See Figure 7.
NOTE: the Grille has a top and bottom.
NET
BT
OPT
AUX
HDMI
PHONO
VOLU ME
HEADP HO NE
PUSH
BT PAIR
PUSH
POWER / MUTE
RS250 WIRELESS LOUDSPEAKER SYSTEM
0
-10
-40 -30 -20
OUTPUT LE VEL
dB
0
-10
-40 -30 -20
OUTPUT LE VEL
dB
NET
BT
OPT
AUX
HDMI
PHONO
VOLU ME
HEADPHONE
PUSH
BT PAIR
PUSH
POWER / MUTE
RS250 WIRELESS LOUDSPEAKER SYSTEM
24.8”
62.99 cm
12.75”
32.4 cm
5.7”
14.48 cm

9
Remote Learning
The RS250 is capable of learning some commands from
most television IR remotes. This is handy to control the
volume of the RS250 that is optically connected to a
television with only the television remote.
To teach the RS250 the other remote’s commands:
Press Result
Press and hold the
Left Knob for 10
seconds.
Power Meter lights will blink
twice. Max Volume LED will
blink twice per second.
Press the
remote button
to be learned for
volume increase.
Power Meter lights will blink
twice. Min Volume LED will
blink twice per second.
Press the
remote button
to be learned for
volume decrease.
Power Meter lights will blink
twice. Min Volume LED
will blink twice every 4 four
seconds.
Press the remote
button to be
learned for mute.
Power Meter lights will blink
twice. The Max Volume LED
will glow steady.
Press the
remote button
to be learned for
standby toggle.
Power Meter lights blink three
times, LED state changes from
steady to o indicating learning
session has ended.
Changing the Remote’s Baery
Someday, the AAA battery in the remote will need to
be replaced. This is how to do it.
The back of the remote control is held in place by
magnets. To remove the back of the remote to reveal the
battery, slide the front of the remote up while sliding
the back of the remote down. The goal is to move the
back 3/16 of an inch from the top of the remote and
then lift it o. There are many ways do to this, as far as
positioning your ngers. To open the remote:
• Hold the remote upsidedown and backwards
withMcIntosh name upsidedown and facing away
from you. The thicker end will now be the top and
you should be staring at the back of the remote.
• Pinch the remote with your index nger resting
on the Trim/Select button and your thumb on the
backside (facing you) opposite your index nger’s
position. Your thumb and remote should both be
pointing away from you (see Figure 8).
• Use your thumb to slide the back open 3/16 of an
inch. Slide your thumb away from you towards the
thicker end of the remote, while your index nger
goes in the opposite direction (towards you). As if
snapping your ngers in slow motion. For added
strength, you can use your other hand in a similar
position above your rst hand using the same
technique. Make sure you do not hold the side edge
with either hand.
• Lift the back o with your other hand before it
snaps closed again. You can grab the now exposed
top edge.
• It gets easier after the rst time.
Remove and replace the battery noting the polarity
(printed below the battery if you forget).
To replace the back: Place the back in position 3/16 of
an inch from the edge. The magnets will help you snap
it back into place.
Figure 8– Sliding open the Remote

10
INPUT
HDMI
OPT
AUX
H R 0 9 4
PHONO
INPUT Source Selection
Press this button to select
the desired program source.
Each press will advance
to another input.
NIGHT
Toggles the meter lights and
input LEDs on and off.
Selects Previous Track
with compatible
playback sources.
Play/Pause with compatible
playback sources.
Powers the RS250 on or off.
LED illuminates during the
time a remote command
is sent to the RS250.
Mutes and unmutes the audio
Decreases the volume level. Increases the volume level.
Selects Next Track
with compatible
playback sources.
LIP SYNC
These two buttons adjust
HDMI, USB or optically
connected audio up to
150ms to sync with video.
Descripon of Remote Control Buons
NOTE: the following additional discrete
commands for external control systems
are available:
POWER ON, POWER OFF, INPUT (Down),
AUX, PHONO, OPT (Optical), and HDMI.
Contact McIntosh Technical Assistance
or your dealer for more information.
Figure 9–
Remote Control Diagram
The Knobs and LEDs on the Front
The Right Knob The Right Knob is primarily
the Volume and Power Knob.
Command Right Knob Action
Raise Volume Rotate clockwise
Lower Volume Rotate counter clockwise
Mute/ Pause Short press (less than half a
second)
Unmute/Play Short press (less than half
a second) or rotate in either
direction
Adjust Bass
Level
Press and Hold while turning
clockwise to increase the Bass
Level and counter clockwise
to decrease. The Meter will
graphically show the level as
adjusted. The midpoint on the
meter is considered neutral
Enter Sleep State
(power down)
Press and Hold for two seconds
Wake from Sleep
State (power up)
Short Press
The Le Knob The Left Knob can be used to select
sources, lighting levels, and place the RS250 in Discovery
Mode.
Command Left Knob Action
Adjust
Lighting
Press and Hold while turning
clockwise to increase the lighting
level and counter clockwise to
decrease. The Meter will graphically
show the level as adjusted
Enter Bluetooth
Discovery Mode
Press and Hold for two seconds
Sleep Mode
Lighting
The Left Knob is used to change
wired inputs, adjust lighting, and to
place the RS250 in Discovery Mode.
Direct input access.
Press to go directly to the
indicated input.

11
Network/Wi-Fi Indicator LED
When connected to a network, the Network/Wi-
Fi indicator LED will be glow a solid green. For
network states, see the table below:
LED Status
Green- slow
pulse
RS250 is in process of joining
the network
Green- solid Connected to the network
Red- solid a network error has occurred
Red- slow
pulsing
there is a critical rmware issue.
Please upgrade rmware
Input Select
Use the Input Select Knob to select any wired
input. Wireless Input selection is automatic. There
is a hierarchy of input types. A Wi-Fi connection
will take precedence over a Bluetooth connection.
If there is no Wi-Fi connection present, Bluetooth
connection is automatic.
If a Bluetooth connection is interrupted then it must
be re-established from the mobile device.
Sleep Mode LED
The LED will glow red when the RS250 is
connected to a live AC outlet and the unit is in
Sleep Mode. When the RS250 receives a power on
command, the Sleep Mode LED will turn o.
Input Indicators
When a network streaming session is active, the
NET light will be lit. When a Bluetooth connection
is established, the BT LED will be solidly lit.
The BT ashing indicates that the RS250 is in
Bluetooth discovery mode. Other inputs will
illuminate when selected.
Rear Connecons
Rear Panel Views
Figure 10– Rear View
Ethernet Port
The Ethernet Port connects your RS250 to your
network’s router using a standard CAT5, CAT5E
or CAT6 cable with an RJ45 connector. Using a
wired connection is one way to access the RS250’s
setup via a browser. For more information, see
“The Browser Interface” on page 12.
AC Connector
Use the supplied AC Power Cord to connect
the RS250 to a live AC outlet.
USB Service Port
The USB port is only for performing service
functions by a qualied service technician. It is
not intended for USB device support or playback.
AUX
IN
S E R V IC E
TR IG
OU T
DATA
OU T
S UB
OU T
P HO NO
IN
P HO NO
G ND
E THE R NE T
OP T IC A L
IN
HDMI AND
OP T IC A L
LE V E L ADJ US T
HDMI IN
(AR C )
C E C
DE F E AT
L R
Contains IC:
Contains FCC ID:
Contains IC:
Contains FCC ID:
Power Switch

12
• Type the IP address of your router into the address
bar of a browser (often 192.168.1.1)
• Enter the router’s Username and password. (The
default can be found in the router’s documentation,
but changing it is a good security rule)
• Look for the RS250 in the list of wired or wireless
clients for your router
• Note the IP address
With the RS250’s IP address:
• Type the address of the RS250 into the address
bar of your router
The RS250 Browser interface has three submenus:
• OVERVIEW (see Fig ure 11)
• SETTINGS (see Figure 12)
• UPDATE (see Figure 13)
Click on the desired heading to enter that menu.
OVERVIEW Menu
The Overview menu provides the following
information about the RS250:
• Serial Number
• MAC Address
• Network IP Address
• Firmware versions
You can provide a Custom Name for the RS250. This
is the name that will display for available AirPlay
devices. If you wish to change the default name, type
the new name in the box and press Enter. If the name
was changed using the Apple Home app, the name
will not be able to be changed on the web page.
The Overview Menu provides an indicator for
the status of your Wi-Fi (WIFI enabled). When
enabled the indicator will show ON and be green.
An ethernet connection takes precedence and will
automatically disable Wi-Fi. Wi-Fi, if set up, will re-
engage when the ethernet cable is disconnected.
SETTINGS Menu
The Power Sleep Timer has two settings:
• ON (default)
• OFF
When the Power Sleep Timer is set to ON, the
RS250 will power o into a sleep state after
approximately 30 minutes of no sound or user input.
After 60 minutes of uninterrupted sleep, the RS250
will enter a Standby Mode. In this Standby Mode,
the Wi-Fi radio is powered o and the unit can not
be woken via the network. Standby Mode power
consumption is less than 0.5 watts.
If the Power Sleep Timer is set to OFF, the RS250
will power o into a sleep state after 30 minutes of
non-activity. The RS250 can be woken from sleep
by input from the network (or physically pushing
the Power Button). In a sleep state, the RS250 will
continue to work with devices congured to control
it in your Google Home collection.
The RS250 can be made to immediately enter a
sleep state by pressing and holding the Right Knob
for two seconds. If Power Sleep Timer is set to ON,
the RS250 will enter Standby Mode after 60 minutes
of uninterrupted sleep.
The Startup Volume Limit has two settings:
• ON
• OFF (default)
When the Startup Volume Limit is ON, upon power
loss or return to play from Sleep or Standby, the rst
playback of the product will start at a low volume
level. When switched to OFF, the product will
resume playback at the last volume level.
The Settings Menu allows you to change settings
for Wired and Wireless network connections.
HDMI and Opcal Gain Adjustment
Many video sources such as broadcast video to
television sets have sound levels that are lower than
typical music sources. Because of this, a volume boost
has been added to the HDMI input making it louder.
The ability to adjust the volume boost of the Optical
input has been added so that the Optical input could be
boosted as needed.
To adjust the volume boost:
• Go to HDMI or Optical input (whichever you
wish to adjust).
• With a typical source playing, adjust the
volume to a midpoint level.
• Rotate the knob located on the rear panel right
side (when looking from the front), and rotate
to achieve the desired output level. Choose this
level to be approximately the same as what you
would experience on another input. When you
have achieved the desired level, release the
adjustment knob. This trim level will be recalled
for the HDMI or Optical input whenever
selected. Note: you may independently set the
trim for HDMI and Optical input. One will not
aect the other.
These settings can be changed at any time.
The Browser Interface
To view the RS250’s browser interface, you will need
its IP address.
There are several ways to nd a device’s IP address. For
instance, you can use IP scanner software. Here is one
way with out additional software. To nd the RS250’s
IP address:
With the RS250 connected to your network with a
wired or wireless connection:

13
Figure 11– OVERVIEW Submenu
Select Network Type to see/change settings:
• Automatic
• Wired
• Wireless
If Network Type is set to Automatic, the RS250 will
automatically connect to Wi-Fi when the ethernet
cable is unplugged provided the Wireless connection
has previously been setup. Selecting Wired for
Network Type will limit the RS250 network
connection to the ethernet port connection. Select
Wireless to setup a Wi-Fi network or to restrict the
network connection to Wi-Fi.
If you selected the Network Type of Wireless, the
following submenus appear:
• Scan Networks
• Display SSID
• Network Password
To set up a wireless connection for the RS250:
• Select Start Scan
• In the Display SSID submenu, select a
wireless network using the up/down arrows
• Enter the Network Password for that Network
• Select Connect
DHCP can be set to ON (Default) or OFF. If you
change this setting to OFF, you will need to provide
the following information manually:
• IP
• Netmask
• Gateway
• DNS (1st and 2nd)
With DHCP ON, this information is automatically
acquired and the submenus to enter the information
are not visible.
Figure 12– SETTINGS Submenu
2
2

14
UPDATE Menu
The UPDATE menu allows you to reset settings to
the factory defaults as well as update your RS250.
To restore Factory settings, select the “Start
Factory Reset” button. Done. Note that you will
lose your Wi-Fi and Bluetooth connection settings.
An alternative method for Factory Reset, is to Press
and Hold the Left and Right Knobs for 10 seconds.
Update Method allows you to set how the RS250
updates its rmware. When set to the default of OTA
Auto, the RS250 will periodically check for updates
and install them automatically. When set to OTA
Manual, the RS250 will check for available updates
when you select the Start Search button to the right
of Check for Update. If an update is available, you
can install it by selecting Start Update. (OTA stands
for “over-the-air”.)
The Service option for updating is for service
purposes by a McIntosh qualied technician only.
While the RS250 is in the process of updating the
rmware, the power status LED will blink twice
in quick succession, pause for 2 seconds, and then
repeat during the entire process. Other internal
processor updating will be accompanied by other
LEDs or indicator ashing. This is normal.
Figure 13– UPDATE submenu

15
Re-packing the RS250
When shipping the RS250, it is highly recommended
that the unit be packed as it was originally shipped to
avoid damage. Failure to properly pack the unit will
likely result in damage. If you need any of the packing
material, you can contact McIntosh Customer Service.
Figure 14–
Packing Material
ITEM QTY DESCRIPTION PART #
1 1 Power Cord (US) 310625SP
2 1 Accessory Box 310626SP
3 1 Molded Foam 310627SP
4 1 Manual 24116500
5 2 Molded Foam 310628SP
6 1 RS250
7 1 Plastic Bag 301629SP
8 1 Non Woven Bag 310630SP
9 1 Carton 310804SP
Power Output
650W - 400W Tweeter/Mids, 250W Woofers
Speakers
Two 20mm Titanium Dome Fluid-lled Tweeters
Four 50mm Titanium Inverted Dome Midranges
Two 4 x 6 inch Long Throw Woofers
HDMI/Coaxial/Optical Digital Input Rate
32kHz to 192kHz, 24-Bit, Dolby Digital, DTS
Input Sensitivity (for rated output)
2Vrms Analog
Maximum Analog Input Signal
2.2Vrms
Overall Frequency Range
40Hz to 20,000Hz
Crossover Frequencies
275Hz and 4,000Hz
Sub out Frequencies
20Hz to 500Hz
100Hz Acoustic Crossover
Streaming Support
Apple AirPlay 2, Google Chromecast, Spotify Connect,
Tidal Connect, Roon
Supported Audio Formats
(Must also be supported by chosen source app and
device) MP3, AAC, FLAC, ALAC, WMA, Ogg Vorbis,
WAV, M4A, OGG, AIFF
Connectivity
Wi-Fi CERTIFIEDTM a, b, g, n, ac
WPATM, WPA2TM, WMM®
2.4/5 GHz, ethernet
Bluetooth 5.0
AVRCP, A2DP, aptX, aptX HD, aptX LL
Power Requirements
100-120V/220-240V ~ 50/60 Hz 400 Watts
Technical Specicaons
Dimensions
Width 24 13/16 inches (62.99cm)
Height 5 11/16 inches (14.48cm)
Depth 12 3/4 inches (32.4cm)
Shipping Carton Dimensions:
Width 29.4 inches (74.68cm)
Height 10.8 inches (27.43cm)
Depth 16.5 inches (41.91cm)
Weight
29.5 pounds (13.3kg) net
35 pounds (15.8kg) in shipping carton

McIntosh Part No. 24116501
The continuous improvement of its products is the policy
of McIntosh Laboratory Incorporated who reserve the right
to improve design without notice. The RS250 is designed
to employ non-McIntosh-provided services some of which
require separate customer subscriptions and some of which
do not, as part of the Product’s functionality. Because
McIntosh cannot control the providers of such services or
the services themselves, the owner of the Product therefore
assumes all risks related to the use of services provided by
anyone other than McIntosh itself. McIntosh cannot and does
not warrant against, and shall have no liability of any kind
for any of the following that are attributable to non-McIntosh
providers or services: (i) interruption, discontinuance, or
other unsatisfactory performance of service; (ii) reduced
Product functionality that is so attributable; or (iii) any other
loss or damage of any kind that is so attributable.