Gemlune SA-50 Plus Digital Amplifier User Guide
- June 7, 2024
- Gemlune
Table of Contents
Customer Service:
cs.gd@goldustore.com (for US) ;
cs.uk@goldustore.com (for EU);
cs.jp@goldustore.com (for JP)
Shenzhen Shuangmusanlin Electronics Co., Ltd.
SA-50 Plus
Safety Notes
To assure the best performance, please read this manual carefully. Keep it in a safe place for future reference.
Warning
- Install this unit in a well ventilated, cool, dry, clean place away from direct sunlight, heat sources, vibration, dust, moisture, and/or cold.
- Do not expose this unit to sudden temperature changes from cold to hot, and do not locate this unit in an environment with high humidity ( i.e. a room with a humidifier) to prevent condensation inside this unit, which may cause an electrical shock, fire, damage to this unit, and/ or personal injury.
- Avoid installing this unit where foreign objects may fall onto this unit and / or this unit may be exposed to liquid dripping or splashing.
- On the top of this unit , do NOT place:
- Other components, as they may cause damage and/or discoloration on the surface of this unit.
- Burning objects (i.e. candles) , as they may cause fire , damage to this unit , and/or personal injury.
- Containers with liquid in them, as they may fall and liquid may cause electrical shock to the user and/or damage to this unit.
- Do not cover this unit with a newspaper, tablecloth, curtain , etc. in order not to obstruct heat radiation. If the temperature inside this unit rises, it may cause fire, damage to this unit, and /or personal injury. - Do not use force on switches, knobs, and/or cords.
- When disconnecting the power cable from the wall outlet, grasp the AC plug; do not pull the cord.
- Do not clean this unit with chemical solvents; this might damage the finish.
- Use a clean, dry cloth.
- Only the voltage specified on this unit must be used. Using this unit with a higher voltage than specified is dangerous and may cause fire, damage to this unit, and/or personal injury. SMSL will not be held responsible for any damage resulting from use of this unit with a voltage other than that specified.
- Do not attempt to modify or fix this unit. Contact qualified SMSL service personnel when any service is needed. The cabinet should never be opened for any reason.
- When not planning to use this unit for long periods of time (i.e. when going on vacation), disconnect the power cable from the AC wall outlet.
- Before moving this unit, disconnect the power cable from the wall outlet.
- Be sure to use the AC adaptor supplied with this unit. Using an AC adaptor other than the one provided may cause fire or damage to this unit.
- Install this unit near the wall outlet and where the power cable can be reached easily.
- For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet. This will prevent damage to the product due to lightning and power-line surges.
Note
The plug severed from the mains lead must be destroyed, as a plug with bared flexible cord is hazardous if engaged in a live socket outlet.
Features
- SA-50 plus uses professional TriCore-digital audio processor, 32bitRISC processor and dual DSP digital audio processing unit, can perfectly decode 32 bit /192kHz music.
- Using the latest TAS5766M amplifier chip from TI company in USA.
- Built-in SDB sound desigend and owned by S.M.S.L(SMSL Dynamic Bass).
SDB:
SDB is a special sound effect designed by SMSL that can dynamically adjust the
bass and treble according to the input source to enhance loudness, stereo and
fidelity of the sound.
Specification
Input: USB(U-disk)/SD card/3.5mm optical/3.5mm analog
THD+N: 0.015%
SNR: 95dB
Channel separation: 94dB
Sampling rate: Optical 16bit/24bit 44.1kHz~192kHz
Output power: 50W+50W@4Ω
Consumption power: 40W
Standby power: 1W
Max. Scannable File Quantity: 1000
Max. Scannable File Folder Layers: 3 layer folder
File format
MP3
Extension:| .mp3, .MP3
Standard:| MPEG-1/MPEG-2 Audio Layer-3
Sampling frequency:| 8 k/11.025 k/12k/16 k/22 .05 k/24 k/32 k/ 44.1 k/48 kHz
Bit rate:| 8 kbps–320 kbps or VBR
WMA
Extension:| .wma, .WMA
Sampling frequency:| 8 k/11.025 k/16 k/22.05 k/32 k/44.1 k/48 kHz
Bit rate:| 5 kbps–320 kbps or VBR
WMA Lossless
Extension:| .wma, .WMA
Sampling Frequency:| 44.1 k/48 k/88.2 k/96 kHz
Quantization bit rate:| 16/24-bit
WAV
Extension:| .wav, .WAV
Sampling Frequency:| 8 k/11.025 k/12 k/16 k/22 .05 k/24 k/32k/ 44.1 k/48 k/
88.2 k/96 k/176.4k/192 kHz
Quantization bit rate:| 8/16/24-bit
AAC
Extension:| .aac, .m4a, .AAC, .M4A
Standard:| MPEG-2/MPEG-4 audio
Sampling Frequency:| 8 k/11.025 k/12 k/16 k/22 .05 k/24 k/32 k/ 44.1 k/48 k/
88.2 k/96 kHz
Bit rate:| 8 kbps–320 kbps or VBR
APE
Extension:| .ape, .APE
Standard:| Monkey’s audio
Sampling Frequency:| 44.1k/48k/88.2k/96k/176.4k/192kHz
Bit rate:| 16/24-bit
FLAC
Extension:| .flac, .FLAC
Sampling Frequency:| 8 k/11.025 k/12 k/16 k/22.05 k/24 k/32 k/ 44.1 k/48 k/
88.2 k/96 k/176.4 k/192 kHz
Quantization Bit rate:| 8/16/24-bit
Apple Lossless
Extension:| .m4a, .M4A
Sampling Frequency:| 8 k/11.025 k/12 k/16 k/22 .05 k/24 k/32 k/ 44.1 k/48
k/88.2 k/96 kHz
Quantization Bit rate:| 16/24-bit
CUE**
Extension:| .cue, .CUE
CUE:| For memory limit, currently limits as below:
1 read 100 CUE files max.
2* max. 300 tracks analysed from all CUE files
For extra tracks beyong the 100 CUE/300 tracks limits, will be treated and played continually as one track.
Illustration and User Guide
*Please Mind the Micro SD card direction when insert it into the slot.
a Replay: press; Last Song: double press; Quick Change Song(backward): long
press
b Play/Stop: press; Power On/Off: long press
c Next Song: press; Quick Change Song(forward): long press
d IR Receiver for Remote Control
e OLED Screen
f Multi-function Knob Mute/Un-mute: press; OK: press;
Menu/Enter/Exit: long press; Next/Previous: roll the knob
g U-disk Input Port (up to 2TB, support NTFS)
h Micro SD Card Slot (up to 64GB)
i 3.5mm Jack for AUX/Analog/Optical Input
j Right Channel Speaker Output Banana Jack (Red)
k Right Channel Speaker Output Banana Jack (Black)
l Left Channel Speaker Output Banana Jack (Red)
m Left Channel Speaker Output Banana Jack (Black)
n Cable Socket for Power Adapter
Remote Control
NOTE
It’s a 3 shifts (A/B/C) remote, however only Shift A is valid for SA-50 Plus,
and shift B & C are both invalid.
*If the red light flashes when you press a key on the remote but it doesn’t work, please press A key first and make sure the IR Receiver on the machine is not blocked.
Interface & Operations
1.Start to Use:
1.1 Before using SA-50 Plus, please install your audio system
(USB/MicroSD/Optical/Analog/AUX input, and speakers). Make sure all the cable
and power connections are good.
1.2 Press the Power key to turn on the device, then you can see the interface
like “figure 1” as follow
1.3 Press Audio Source Selection Key on the remote to select the input source
you would like to play. (or long press Menu Key to enter menu > “Input” to
select the input source) Then the display will turn to music interface (as
“figure 2”).
(figure 1)
1 Current Input Source
2 Input Source Status
(when use USB disk as input, the screen will appear “Searching” and after
finishing scanning all music files, it will turn to play screen)
(figure 2)
3 Play Mode (Default/Repeat all/Random/Repeat Track)
4 Play Status (Playing/Stop)
5 Music Sampling Rate / Muting
6 Song Name
7 Play Time for current music
8 Current Music File Format
*Song name can display English/ German/ French/ Spanish/ Italian/ Russian.
2. Enter Menu & Settings:
2.1 Enter Menu: Long press Menu Key to enter the menu, and you’ll see the
menu interface as “figure 3”
2.2 Select Function: Press & to select the function you would like to set
and press to enter setting.
2.3 Exit Setting: Long press Menu Key to exit setting.
2.4 Hidden Menu: If there’s no input source connected to the device, the
system will automatically hide some functions from the menu to avoid mis-
operation, as “figure 4”.
(Figure 3)
9 Input Selection
(USB →SD Card→Optical In→AUX)
10 SDB Sound Effect (On/Off)
11 Tone (Bass 0-3; Treble 0-3)
12 Play Mode
(Default/Repeat all/Random/Repeat Track)
(Figure 4)
13 Display
Auto Weaken Screen (5s →15s→30s→60s→OFF)
Auto Turn Off Screen (5s→15s→30s→60s→OFF)
14 Firmware Version Info
15 Reset (Factory Reset/Return)
3.Firmware Update:
3.1 Visit “www.smsl-audio.com” > “
Support ” to download the latest firmware.
Save the “rom.upd” file to the root directory/folder of a USB disk.
3.2 Press Multi-function Knob (NO. f key) for 5 seconds, hold it meanwhile
press Power Key on the machine till the screen turns on and show “ NO USB
”.
3.3 Insert this USB disk to the U-disk port on SA-50 Plus, and it will install
the new firmware automatically. When the system shows “100% update”, the
update is finished.
*NOTE: SMSL will update firmware for SA-50 Plus irregularly, please visit www.smsl-audio.com to check.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>