Amplifier
Model Number
M50
Amplifier Power
50W *2 @ 4ohm 24V power
80W *2 @ 4ohm 32V power
Speaker Impedance
4-8ohm
Frequency Response
20Hz to 20KHz
Audio I/O
Audio Input
Line in
Analog RCA, Max 2V RMS input
Optical in
Max 192kHz/24bit sample rate decode 
PCM encoding
USB Host
USB disk drive playback
USB Type-C
USB DAC for PC connection
Audio Output
Line out
Analog RCA, Max 2V RMS output
Subwooferout
Max 3V RMS output,Frequency Response: 300Hz
Speaker out
Banana Plugx4
Network
WiFi
 IEEE802.11 b/8/n 2.4G/5G
Ethernet
RJ45
Music Sources
Streaming Protocol
Spotify Connect,Tidal Connect,Airplay2,DLNA,UPnP,Qplay
Online Music
Spotify.Tidal, DeezerQobuz.Napster Pandora,Amazon MusicInternet Radio. iHeartRadio,vTunerQQmusicQQFM
Local Music
Mobile device music, NAS storage musicfiles, USB disk drive music files
Multizone function
1. By 4stream APP to setup one device as master to sync music to other connected function devices 
2. By Airplay2 multiroomfunction
General 
Power Input
12V-32V
Size
185x155x50mm
Accessories
24V/4.16A Power Adaptor,Antennax2,Remote Controller
80W+80W Power Amplifier
M50 is a 2 Channel stereo amplifier with 80W+80W output power which let you enjoy wonderful quality music. It can be used with 4ohms or 8ohms impedance speakers, perfect to create your home music streaming sound system.
AirPlay 2
M50 support Airplay2 to stream music from your iOS device.You can easily stream music wirelessly form your mobile, PC or NAS in your local network.
Hi-Res 24bit/192kHz
M50 able to decode,stream&output 24bit/192kHz high-res aud
DAC ES9023
M50 able to M50 build with ESS ES9023 DAC to provide high quality music output.
Wireless Connection
M50 supports 2.4G WiFi and Bluetooth 5.0 wireless conneciton. It also supports Airplay, DLNA & UPnP protocols. You can easily stream music wirelessly form your mobile, PC or NAS in your local network.
Lossless Audio Format
M50 can decode upto 24bit / 192kHz audio and supports various lossless audio format, including FLAC / MP3 / AAC / AAC+ / ALAC / APE / WAV.
HD Online Music Services
M50 supports many famous online music services like Sportify, Deezer, Tidal, Amazon Music, Qobuz, Napstar, iHeartradio, Internet Radio and QQ Music. You can easily stream your favorite music from the music service provider you usually use
Multiroom / Multizone
With multiple devies in different room, you can easily group them in different group and stream music to the master device which will sync the same music to other devices in the same grou