Fosi Audio DA-2120B Manuel utilisateur

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Fosi Audio DA-2120B User Manual

Product Specifications

Fosi Audio DA-2120B is a ultra mini Bluetooth 5.0 audio

amplifier for passive speakers that features stereo 100 watt

x2, 2 channel power amp which is equipped with integrated

Bluetooth, USB, coaxial, optical, 3.5mm aux and USB flash

disk inputs, with a remote control to switch volume, bass,

treble and modes to enjoy hi-res music!

THD:

SNR:

Bluetooth:

Max Power Output:

Bluetooth Transmission

Distance:

Input Mode:

≤ 0.001%

DA-2120B

≥ 92dB

Bluetooth Name:

Up to 50ft

Remote Control Distance: Up to 20ft

Power Supply: 24V 4.5A

100W + 100W @4Ω

Terminating Impedance: 2-8Ω

(Recommended 4Ω)

Bluetooth + USB + coaxial

+ optical + 3.5mm aux

+ USB flash disk

USB Input Sampling

Frequency:

16Bit/48kHz

Output Mode: Passive Speakers

Optical/Coaxial Input

Sampling Frequency:

32Bit/192kHz

Maximum USB flash

drive storage:

32GB

Frequency Range: 15Hz - 20kHz

Working Voltage: 12V - 24V

V5.0

Product Overview & Control

Functions

System Supported: XP/W7/W8/W10/MAC/Linux

Size: L140*W110*H34mm

(5.5*4.3*1.3inch)

Bluetooth Antenna

LED Display

Power Switch

Multi-function Knob:

Short press to switch modes;

Turn the knob to adjust the volume

AUX Input

Coaxial

Input

USB Flash

Drive Input

PC-USB Input

Speakers Output:

Only support passive speakers

Antenna

Interface Optical

Input DC Input:

Max 24V

R L

PC OPTU-DISK

INPUTS

AUX COA DC IN



DA-2120B V- V+MODE

Remote Control

V– V+

MODE

H–

B–

H+

B+

Mute on/off3

Software volume5

Treble up6

Power on/off1

Play mode:

single cycle---

all loop---

file loop---

random play---

Note: It can only be used in USB flash

Number Function

Software volume down

(Note: For hardware sound, please adjust the

volume knob of the device.)

Package Contents

Fosi Audio DA-2120B *1

Remote Control *1

Optical Cable *1

PC-USB Cable *1

3.5mm to RCA Cable *1

Bluetooth Antenna *1

DC 24V Power Supply *1

User Manual *1

Banana Plugs *8

Quick Setup

Preparation

Prepare 1: DA-2120B, 24V power supply, passive speakers, speaker

wires, and banana plugs;

Prepare 2: Connect the DA-2120B to the passive speakers via the

speaker wire or banana plugs;

Prepare 3: Connect the 24V power supply to the DC input;

Prepare 4: Short press the Power Switch to turn on the DA-2120B

amplifier.

Treble down7

Bass down8

Bass up9

Input mode select10

Previous song11

Next song12

Play/Pause13

Rewinds song15

Fast forwards song16

Number keys: Allows direct access to

specific songs

Package Contents

Fosi Audio DA-2120B *1

Remote Control *1

Optical Cable *1

PC-USB Cable *1

3.5mm to RCA Cable *1

Bluetooth Antenna *1

DC 24V Power Supply *1

User Manual *1

Banana Plugs *8

Quick Setup

Preparation

Prepare 1: DA-2120B, 24V power supply, passive speakers, speaker

wires, and banana plugs;

Prepare 2: Connect the DA-2120B to the passive speakers via the

speaker wire or banana plugs;

Prepare 3: Connect the 24V power supply to the DC input;

Prepare 4: Short press the Power Switch to turn on the DA-2120B

amplifier.

Method 2: Bare wire connection illustration

: Release the horn terminals block terminals;

: Insert the two ends of the speaker wire into the

amplifier and speaker terminal holes;

: Tighten the horn terminals;

Note: Please make sure that the speakers’ wire are not attached

with each other, the speaker connection area is very

narrow, it is easy to cause the positive and negative

speakers’ wires to contact each other, which will result in

no sound output.

How to connect the speaker wire?

Method 1: Banana plugs connection illustration

: Release the banana jacket;

: Loosen the screw;

: Insertion speaker wire and tighten the screw;

: Tighten the banana jacket;

: Insert the banana plug into the horn terminals of the

speaker and amplifier.

Note: Please make sure that the speakers’ wire are not attached

with each other, the speaker connection area is very

narrow, it is easy to cause the positive and negative

speakers’ wires to contact each other, which will result in

no sound output.

Release Jacket Loosen Screw Insertion speaker wire

tighten screw Tighten Jacket

1 2 3 4

banana plug into

the horn terminals

1 2 3

Bluetooth for example

Prepare: Bluetooth device (Phone for example)

Step 1: Press the Multi-function Knob to select to Bluetooth mode,

“BLU” display is flashing;

Step 2: Turn on the Bluetooth on your phone and search for:

“DA-2120B”, connect to the DA-2120B, after Bluetooth

connection, “BLU” display is no longer flashing and not

visible, “ ” will stay on.

Step 3: Open the audio application, play and enjoy!

PC-USB for example

Prepare: PC, PC-USB cable.

Step 1: Connect the PC to DA-2120B’s USB interface via the

PC-USB cable;

Step 2: Press the Multi-function Knob to select to USB mode;

Step 3: Click the sound icon in your PC’s notification area; click

the “Select playback device” option; select the playback

device - SPDIF "USB AUDIO" or “Fosi Audio DA2120B”;

Step 4: Open the audio application, play and enjoy!

Note: In USB mode, please do not insert the USB flash drive, some

USB flash drive and USB input is not compatible, resulting

in no sound output, or amplifier restart. Please unplug the

USB flash drive and try again.

Optical for example

Prepare: optical device (TV for example), optical cable.

Bluetooth for example

Prepare: Bluetooth device (Phone for example)

Step 1: Press the Multi-function Knob to select to Bluetooth mode,

“BLU” display is flashing;

Step 2: Turn on the Bluetooth on your phone and search for:

“DA-2120B”, connect to the DA-2120B, after Bluetooth

connection, “BLU” display is no longer flashing and not

visible, “ ” will stay on.

Step 3: Open the audio application, play and enjoy!

PC-USB for example

Prepare: PC, PC-USB cable.

Step 1: Connect the PC to DA-2120B’s USB interface via the

PC-USB cable;

Step 2: Press the Multi-function Knob to select to USB mode;

Step 3: Click the sound icon in your PC’s notification area; click

the “Select playback device” option; select the playback

device - SPDIF "USB AUDIO" or “Fosi Audio DA2120B”;

Step 4: Open the audio application, play and enjoy!

Note: In USB mode, please do not insert the USB flash drive, some

USB flash drive and USB input is not compatible, resulting

in no sound output, or amplifier restart. Please unplug the

USB flash drive and try again.

Optical for example

Prepare: optical device (TV for example), optical cable.

Step 1: Connect the TV to DA-2120B’s optical interface via the

optical cable;

Step 2: Press the Multi-function Knob to select to optical mode;

Step 3: Set the TV's optical output sound to RAW/PCM.

Note: Due to different TV types, some TVs default Dolby or DTS

sound output, DA-2120B does not support Dolby and DTS

sound, please select RAW/PCM sound, otherwise you will

hear a lot of noise or no sound output.

Step 4: Open the audio application, play and enjoy!

Coaxial for example

Prepare: Coaxial device (TV for example), Coaxial cable (no

include).

Step 1: Connect the TV to DA-2120B’s coaxial interface via the

coaxial cable;

Step 2: Press the Multi-function Knob to select to coaxial mode;

Step 3: Set the TV's coaxial output sound to RAW/PCM.

Note: Due to different TV types, some TVs default Dolby or DTS

sound output, DA-2120B does not support Dolby and DTS

sound, please select RAW/PCM sound, otherwise you will

hear a lot of noise or no sound output.

Step 4: Open the audio application, play and enjoy!

AUX for example

Prepare: AUX device (Fosi Audio Phono Preamp BOX X1 for

example), 3.5mm to RCA cable.

Step 1: Connect the Fosi Audio BOX X1 to DA-2120B’s AUX

interface via the 3.5mm to RCA cable;

Step 2: Press the Multi-function Knob to select to AUX mode;

Step 3: Connect the phono and turn it on, play and enjoy!

USB flash drive for example

Prepare: Max 32GB USB flash drive (audio files included: supports

MP3/WMA/APE/ FLAC/WAV audio formats)

Step 1: Insert the USB flash drive into the U-disk connector of the

DA-2120B;

Step 2: Press the Multi-function Knob to select to USB flash drive

mode;

Step 3: The device automatically plays the audio from the USB

flash drive;

Note: In the USB flash drive mode, please do not insert the USB

cable, some USB flash drive and USB input is not

compatible, resulting in no sound output, or amplifier

restart. Please unplug the USB cable and try again.

Troubleshooting/QA

1: Why do I feel that the amplifier is underpowered and

the sound is very small?

• DA-2120B amplifier has hardware volume adjustment and

software volume adjustment. Please make sure the volume of the

amplifier is adjusted to the maximum, and the volume of the

remote control is adjusted to the maximum.

2: Why do I get loud hiss noise coming from the TV via

optical input?

• Please turn off Dolby/DTS audio on your TV or TV App, DA-2120B

does not support Dolby/DTS audio input, please select RAW/PCM

sound.

3: Can the DA-2120B be powered by batteries?

• Yes, but it is not recommended. The amplifier may be damaged

when the battery power is unstable.

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