SMSL A12 Bluetooth 5.0 Stereo Audio Amplifier User Manual

A12

USER MANUAL

Safety Notes

• Install this unit in a well-ventilated, cool, dry, clean place away from direct sunlight, heat sources, vibration, dust, moisture, or cold.
• Use the voltage specified on this unit Only. Using this unit with a higher voltage than specified is dangerous and may cause fire, damage to this unit, or personal injury. Our company will not be held responsible for any damage resulting from the use of this unit with a voltage other than that specified.
• Do not attempt to modify or fix this unit by yourself. Contact salesperson or customer service 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.

Important note:

The product specifications and information mentioned in this manual are for reference only. The content of this manual is subject to change without notice.

Warranty Terms

Warranty Terms

1. The term of service Foshan Shuangmusanlin Technology Co., Ltd. promises good quality products. If the product is defective by normal use within 7 days after purchasing, the customer can choose to send it back for returning or repairing (only the product does not affect the secondary sales can be returned ). Faulty for free within one-year warranty normal use.

2. The date of purchase is in accordance with the date on the invoice or receipt used by the seller, online shopping can show the screenshot of trade.

3. Following situation can not enjoy“Three Guarantees service”
   a.All damages by human factors, including using it under a non-normal working environment and not following manual instructions.
   b.User privately disassemble, modify, maintenance.
   c.Use non-designated or approved accessories to cause damage.
   d.QC or warranty stickers damage on the cabinet.
   e.Can not provide valid purchasing prove.
   f. Not belong to SMSL product.

4. How to guarantee These terms are only suitable for China mainland, another region please refer to the policy of the local sales agents and nations.

Features

• German Infineon’s new technology class D power amplifier chip, higher quality, efficiency up to 92%, further reducing power consumption;
• USB audio input and support for driver-free use;
• Support U disk playback;
• Built-in treble/bass adjustment for easy matching of a variety of speakers and music;
• Bluetooth 5.0 receiver, support APTX, better sound quality, longer transmission distance;
• All aluminum alloy CNC precision processing shell, anodizing technology, and chamfering process, exquisite workmanship, and delicate touch;
• A large number of audio grade components are used to enhance the sound experience;
• High-quality gold-plated input and output terminals;
• Perfect protection circuit for overheating, overcurrent, etc.
• High-quality power adapter specially designed for audio.

Specification

Inputs ……………………………………………………………………USB, RCA, LINE IN
THD+N ………………………………………………………………..0.005%
SNR ………………………………………………………………………..102dB
Channel separation ………………………………………………….98dB
Output Power …………………………………………………………80Wx2(4Ω) / 40Wx2(8Ω)
Input sensitivity/input impedance …………………………..190mV / 40kΩ
Power Consumption ……………………………………………..35W(Normal Volume)
Size ………………………………………………………………………..139x35x127mm (WxHxD)
Weight…………………………………………………………………….382 g
Support audio format…………………………………………….MP3, SBC, WAV, FLAC*

Specifications are subject to change without notice.

Notes on the use of Bluetooth

There are other WiFi 2.4G and Bluetooth devices in the use environment, which is prone to interference,  which may lead to unsuccessful connection, or sound freeze, or even interruption of playback.
Bluetooth also affects effective transmission due to too long a distance or being blocked by a block (such as a wall). It is recommended that the straight-line distance for obstacles is generally about 8-10 meters.
For some Android mobile devices, Bluetooth may not be fully compatible, which may result in abnormal playback. Please confirm that there is no compatibility issue with the mobile phone before use.

Display Interface and Instructions

Instructions for use

Connect the power adapter to the DC socket and turn on the power by turning on the power switch on the panel. The blue indicator light is on.

1. USB interface U disk playback
   • Turn the input selector switch to the USB position, insert the USB flash drive into the USB interface, and A12 will automatically play the audio files in the USB flash drive (the files must be in the format supported by A12, and the order is arranged according to the time when they are stored in the USB flash drive.)
   • If you use a USB flash drive with a slower read and write speed to play larger audio files (such as WAV, FLAC), it may cause abnormal sound.
   • Please replace a USB flash drive with a faster read and write speed.
   When there are a lot of files in the USB flash drive with a larger capacity, it will take a long time to read and play, please be patient.
   • When there are more files in the USB flash drive with a larger capacity, it will take longer to switch from USB to other input.

2. USB interface computer playback
   • Turn the input selection switch to the USB position, and the USB interface is connected to the computer through a suitable USB cable. At this time, the computer should find “USB AUDIO”. Open the computer music player and select this “USB AUDIO” to play (these files must be in the format supported by A12.)
   • If the USB cable is always connected to the computer and the A12 is switched from BT, LINE IN mode to USB mode when it is turned on, the computer may not be able to find “USB AUDIO”. At this time, please unplug the USB cable and plug it in again, or turn off the A12 for a few seconds and then turn it on again, the computer will find “USB AUDIO”.
   • To get a better sound effect, please adjust the volume of the phone to the maximum.

3. Bluetooth playback
   • Turn the input selector switch to the BT position, turn on the Bluetooth of the mobile phone, search for “SMSL BT5.0C”, and click to select the connection.
   Open the mobile phone music player, you can play mobile phone music through A12.
   • If you want to use another mobile phone for Bluetooth connection, please use a thin object such as a toothpick to press the button in the “Bluetooth Clear” hole on the back panel for 1 second to clear the Bluetooth memory before pairing with another mobile phones.
   • To get a better sound effect, please adjust the volume of the computer to the maximum.

4. Line input playback
   • The input selection switch is set to the LINE IN position, and the line input interface is connected to the audio source through a suitable audio cable, and it can be played.

5. Bass, treble, volume adjustment
   • When the bass and treble knobs are adjusted to the 12 o’clock position, the bass and treble are not adjusted.
   • When the knob is turned fully clockwise, the bass and treble are +12dB.
   • When the knob is turned counterclockwise to the end, the bass and treble are -12dB.
   • When the volume knob is turned fully counterclockwise, the volume is minimum.
   • When the volume knob is turned fully clockwise, the volume is at its maximum.

http://www.smsl-audio.com/

The contents of this manual may be changed with the edition, and are subject to change without notice!

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