Rakoso M400 User manual

M400
User's Manual
Network 4 Zone Pre-Amplifier
4 Zone Spotify AirPlay Multi-Room Internet Radio

Table of contents
1. Introduction..............................................................................................................................................1
2. System Requirements .............................................................................................................................1
3. What's in the box ...................................................................................................................................2
3.1 Font Panel .........................................................................................................................................3
3.2 Back Panel ............................................................................................................................................3
3.3. Interface................................................................................................................................................4
4. Remote controller ....................................................................................................................................4
5. Connection diagram ................................................................................................................................5
5.1 How to use.........................................................................................................................................6
5.2 App download....................................................................................................................................6
5.3 Connection ........................................................................................................................................7
5.4 Connect to USB storage device ........................................................................................................7
5.5 Connect to audio playback device ....................................................................................................8
5.6 RS232 Serial Port .............................................................................................................................8
5.7 Connect to network ...........................................................................................................................9
6. Download 4Stream APP........................................................................................................................10
7. Using M400 ...........................................................................................................................................10
7.1 Selecting a zone..............................................................................................................................10
7.2 Play same music to multiple rooms................................................................................................. 11
7.3 Listen to online music......................................................................................................................12
7.4 Spotify..............................................................................................................................................12
7.5 Airplay..............................................................................................................................................12
7.6 Qplay ...............................................................................................................................................12
7.7 Listen to local music ........................................................................................................................12
7.8 Music Playlist...................................................................................................................................13
7.9 Play music from line in.....................................................................................................................13
7.10 Play music from Optical/Coaxial in................................................................................................13
7.11 Play music from PC .......................................................................................................................13
7.12 Changing Output channels............................................................................................................13
8. Device Settings......................................................................................................................................14
9. Firmware Update...................................................................................................................................14
10. Specication ........................................................................................................................................15
11. FAQ......................................................................................................................................................16

1
M400 is a multi-room system that enables you to enjoy your favorite music anywhere in your home. M400
contains 4 audio streamers for you to use as audio source, you can easily play music form online music
services, your phone storage, NAS and other sources by using the 4Stream app on your iOS or Android device.
High Speed Internet Connection:
M400 needs internet connection to stream music from online music services and to get online rmware updates.
You may experience performance issues with slower internet connections.
Wireless Router:
In order to use M400, you will need to have a working Wi-Fi network in your home, since the control APP on
your mobile device need to be in the same network as the streamer.
Control APP – 4Stream:
You can control M400 using our free 4Stream app on any iOS and Android device that meets these minimum
requirements:
-Multi-room audio function: play di󰀨erent songs in di󰀨erent rooms or same song in every room.
-Easy network setup: Connect to your home network and it is ready to use.
- Rich I/O interface: Each zone has separate digital output and analog input/output. There is also a master
source input that all zones can be used at the same time.
1. Introduction
2. System Requirements

2
3. What's in the box
User’s Manual
Rack Mount Brackets x2 12V/2A Power Adapter
M400 Ethernet Cable

Power Button
Streaming Indicator – LED on when streaming.
Input Source Indicator – LED Color: White for Network Audio, Green for Line in 1 (Zone Line in),
Yellow for Line in 2 (Master Line in), Magenta for Master Optical in, Cyan for Master Coaxial in, Red for USB.
Network Indicators – LED on when network is available.
Pre-Out
Line In (Line 1 in APP)
Digital Coaxial Out
Digital Optical Out
12v Trigger out
USB port
Master Line In (Line in 2 in APP)
Master Digital Coaxial In
Master Digital Optical In
Master 12V Trigger out
Reset button
Pass Through (RS232 port)
RS232 Port
Network input
Network output
DC input
3.1 Font Panel
3.2 Back Panel

M400 is an audio streamer and need to use with an external device that o󰀨ers audio amplication. You should
place M400 near to the amplication device you want to connect to.
M400 is designed to t in a 1U equipment rack for easy installation. Attach the included rack mounting brackets on
each side of M400 if you want to mount it in a standard EIA equipment rack.
-Remove the two screws on each side of M400
-Align the rack mounting brackets with the screw holes and screw back the screws, make sure they are tightly secure.
Zone ID Switch for RS232 port program use.
3.3 Side Panel
4. Placing your M400

5
You can play the same audio source in all four zone at the same time, you can also play di󰀨erent audio sources in
di󰀨erent zones.
5. Zone Connection

6
Connect the LINE OUT output to the input on your amplier or AV receiver using the appropriate cable. M400
supports both analog output (RCA) and digital output (Optical & Coaxial).
Connect the LINE OUT “L” output to the input on
your active subwoofer or subwoofer amplier.
5.1 Connect to external amplier or AV receiver
5.2 Connect to external subwoofer
Your amplifier or
AV receiver
AUDIO
IN
R L
COAXIAL
IN
OPTICAL
IN
———— AUDIO ———— ———— AUDIO ————
IN
Subwoofer
with built-in
amplifier

7
If the audio amplier connected to M400 has a trigger input connector, you can connect it to the TRIGGER OUT of
M400 using a 4.5mm cable (not included). A12V/150mA signal is output from the TRIGGER OUT port.
Use a monaural mini-plug cable for connecting the TRIGGER OUT port. Do not use a stereo mini-plug cable.
To play music stored in a USB storage device, just plugin a USB storage device containing music les to the USB
port of the Zone you want to play with.
5.3 Trigger Control
5.4 Connect to USB storage device
TRIGGER IN
USB memory
device

8
Connect the LINE IN in each zone or LINE IN, COAXIAL IN, OPTICAL IN in the master input area to an audio
playback device, it can be a CD player, portable music player or any device with audio output using the same
connector.
In the APP, LINE IN in each zone is represent as Line in 1, LINE IN in the master input area is represent as Line in 2.
5.5 Connect to audio playback device
Analog device
R L
———— A
U
DI
O
OU
T ———
—
Digital device
———— A
U
DI
O
OU
T ———
—
COAXIAL OUT OPTICAL OUT

9
Connect M400 to your home router using a LAN cable to add it into your home network. You can use the
NETWORK OUT port to connect another device to the same network.
5.7 Connect to network
RS232 serial port is reserved for connection to smart home control unit to control M400. You can use the Pass-
Through port to connect to another M400 for group control.
The Switches on the side is used to assign device ID for each zone to let the control unit distinguish each zone.
5.6 RS232 Serial Port
ROUTER
SMART HOME
CONTROL UNIT

10
The 4Stream APP is the controller of the whole system. Install 4Stream APP in your mobile device and you can
control and stream music anywhere in your home.
The application supports English, Spanish, French, German, Italian, Portuguese, Korean, Simplified Chinese,
Traditional Chinese and Japanese.
You can download 4Stream App for iOS or Android by searching “4Stream” in App Store or Google Play.
Once you have connected your M400 to your network
and install 4Stream app in your mobile device, you can
start playing music to di󰀨erent rooms. You can listen to
di󰀨erent music in di󰀨erent room or the same music in
all rooms in sync.
In 4Stream APP you will see all the connected devices
in the same network.
1. Select the device you want to control, the selected
device will have a green bar appears on the left side.
2. Swap to the left to open the list of music sources.
3. Select an online or local music source from the list
to start streaming your music.
6. Download 4Stream APP
7. Using M400
7.1 Selecting a zone
4STREAM

11
You can play the same music to multiple rooms simultaneously by pulling a device over another device to from
a group. The device list on top of the group is the master device, the music stream to the master device will also
playback on other devices in the same group.
If your music source is from the master source input, there is no need to group the devices, since all the devices
can access the master source input.
*There will be a small delay between the audio source and the 4 zones when in multizone mode, all 4 zones will
be in sync with no delay between them.
*There is no delay when you use the master source input as input source for the 4 zones. No need to group them
together, ungroup them to play in sync with the input source.
7.2 Play same music to multiple rooms

12
M400 can work with famous online streaming music
services like Spotify, Tidal, Qobuz, Deezer, Amazon Music,
QQ Music, TuneIn, Internet radio, iHeartradio. You can
easily stream music or playlist from your account wirelessly
and play on your home audio system.
To use Spotify, you need to have Spotify premium account.
You will nd the device in device list in Spotify application
and choose the device you want to stream.
The device supports Airplay1, you can choose Airplay in
iOS device and play music.
The device supports QQ music using Qplay protocol, you
need to turn on Qplay in QQ music application setting and
then nd the device in Qplay list
M400 can stream local music stored in your mobile phone,
USB storage drive, NAS using DLNA protocol, PC software
like itunes, or UPnP/DLNA 3rd party software.
Click on “My Music” to select the local device you want to
play from.
Note: iOS based devices have blocked the access to
iTunes library.
*Our system only supports NAS using DLNA protocol.
7.3 Listen to online music
7.4 Spotify
7.5 Airplay
7.6 Qplay
7.7 Listen to local music

13
-Connect an external audio source to line-in port using
RCA cable.
-Choose line in mode in the 4Stream application to switch
to line in mode.
-Line in 1 is the line in port of the current zone, Line in 2 is
the line in port Of the master input source.
-Connect an external audio source to Optical/Coaxial in of
the master input source.
-Choose Optical or Coaxial in the 4Stream application to
switch to the corresponding mode.
You can create music playlist and add local music to the
list for streaming.
You can stream audio stored in your Mac and Windows PC
by using iTunes, 3rd party UPnP/DLNA streaming program
like Foobar2000, Music Bee or Serviio.
You can change the output channel of the zone, you can
change between Left channel only, Right channel only
or Stereo. You can set Zone 1 to play Left channel and
Zone 2 to play right channel, group them together to make
stereo. By default it is set to Stereo.
7.9 Play music from line in
7.10 Play music from Optical/Coaxial in
7.8 Music Playlist
7.11 Play music from PC
7.12 Changing Output Channels

14
Rename: You can rename each zone to di󰀨erent name to
t your needs.
Speaker info: You will see the device information like
device’s IP address, Device name, Firmware Version and
Restore Factory Default.
Preset: You can store 10 di󰀨erent playlist or radio station
to the Preset list for quick access.
Any list or station with the speaker icon can be preset.
Click on the speaker icon and you can assign it to the
preset list.
Restore Factory Settings: Long press the Reset button
for 8 sec to restore the device to factory default settings.
This will reset all the zone names, volume and current input source.
Alarm Clock: Setup music alarm clock, music can choose from Preset list, internet radio, iHeartRadio, Napster, Tidal,
Spotify, Deezer and NAS
Sleep Timer: Setup a Countdown timer to stop music.
EQ: You can control treble and bass of the device.
Whenever a new rmware is available, you will be notied by a “new” icon. Click on the “new” icon to begin rmware
update, it will take couple minutes.
It is recommended to update rmware when it is available, it might not only correct bugs or improve performance, but also
might add new features or services.
8. Device Settings
9. Firmware Update

15
10. Specication
4 Zone Audio I/O
Audio Input
Line in Max 2V RMS input
USB USB Playback
Audio Output
Line out Max 2V RMS output
SPDIF Optical
44.1KHz/16Bit output, multiroom function
SPDIF Coaxial
Master Input Source
Audio Input
Line in Max 2V RMS input
SPDIF Optical Max 192KHz/24Bit Sample Rate Decode
PCM encoding
SPDIF Coaxial
Network
Ethernet In RJ45
Ethernet Out RJ45 Output to other device to share the network
General
Power
12V DC in (12V/2A)
12V Master Trigger Output, Trigger Output on each zone
Control Interface Dual-way RS232
Size 43x20x4.5(5.3 with footer) cm

16
FAQ
Q: Do your devices support airplay and third-party DLNA apps?
A: Yes. They support airplay and third-party apps like MusicBee, Foobar2000.
Q: How many zones can you group in one system?
A: 12 rooms is the maximum, while 8 zones are recommended.
Q: What distance can your wireless audio system cover?
A: Once the system is connected to your WiFi router, you can stream your music anywhere there is a WiFi
signal.
Q: Can it play high resolution music?
A: Yes. Our devices can play APE and FLAC within the normal bit rate range. They also support decoding
24bit/192kHz music les.
Q: How many languages do you support?
A: Our devices will auto-detect your mobile device language and change automatically. Currently, we
support English, French, German, Spanish, Chinese, Portuguese, Korean and Japanese and more on the
way.
Q: What online music services do you support?
A: Spotify, Deezer, Tidal, Qobuz, Amazon Music, Napster, TuneIn radio, internet radio, iHeartRadio.
Q: Can I play local music?
A: Yes. You can play music from “MY MUSIC” on the application from local storage devices such
as mobile device storage, USB thumb drives and NAS.
Q: Can the device work with Windows devices?
A: The Windows application is not available at the moment, but on the Windows PC, users can use iTunes,
Foobar2000 and Spotify connect.
Q: Can all music sources play in multiroom mode?
A: Yes, the online music services, digital and analog input all can stream in multiroom mode.

@Copyright 2021 by Rakoso. All Rights Reserved.
The information contained in this guide is believed to be accurate and reliable. Rakoso assumes no
responsibility for any errors contained in this guide. Rakoso reserves the rights to make changes in the
specications and/or design of the above mentioned product without prior notice. The diagrams contained
in this guide may also not fully represent the product that you are using and they are for illustration
purposed. Rakoso assumes no responsibility for any di󰀨erences between the product mentioned in this
guide and the product you may have.