AIYIMA DAMrs. Lempi Stokes IBrayan MurazikC-A1 Mini HeadphRicky SchmidtDaniella Robertsone AmpDr. Penelope Whitelifier ESDr. Madalyn Conn DDS9018Q2M BProf. Brendon Spencer IluetoothMonica Ullrich 5.0 DecMr. Lincoln Kertzmann Sr.oder Coaxial OpMrs. Vesta RunteProf. Hellen Swaniawskitical USGranville Lowe DDSB DAC APEX-HD LinuAletha TrompFatima Gaylordx Remote ControlRaoul Dickinson Sr.

Product description:

Product name: DAC-A1

Chipset: SA9123L+ES9018Q2M+NJW1194+MAX97220+NE5532

QCC3034 Bluetooth: Version 5.0, supports AAC,SBC,APTX,APTX-LL, and APTX-HD

PC-USB sampling rate: 24bit/192khz

PC-USB operating system: Windows XP/window7/8/10 / Max OS/MAC/Linux

Fiber/coaxial sampling rate: 24bit192khz

RCA: Snr: 103 db, THD + N: 0.0032%

Headphone (unbalanced) : Snr:100db,THD+N:0.0032%,

Frequency response :20-20Khz (±1db)

RCA output level: 2.3V

Treble and bass adjustment range: ±10db

Output power of the headphone amplifier :120mW@32Ω

Headphone impedance: 16-200Ω

Audio input: Bluetooth /USB/ Coaxial/Fiber

Supported devices: Mobile phone, tablet, computer, MP3, TV, etc

Output mode: ear amplifier/amplifier + passive speaker/active speaker

Power supply: DC5V

Size: 101 * 98 * 33 mm

Package included:

1Pcs DAC-A1

Product question:

1 Amplifier board has current sound and noise

Most of our amplifier board use DC power supply. The board itself does not produce current

sound and noise. The main causes of current acoustic noise are:

A, The power supply filter used is not good;the current sound is caused by wrong input by

the power or audio input.

B,The input signal quality is poor; the output of the device connected to the input is improper

and the noise is caused by the abnormal input of the audio source.

C,The input cable is of poor quality:the line is in poor connect;the wiring is damaged the

wiring is suspended

D, The input connection has other playback devices,and some devices share the power

supply to cause noise.

2. No sound output no sound in 1 channel

A.The speaker is broken. or the speaker cable is not connect well.

B.The input cable is not in good connect;the wiring is damaged; the output of the device

connected to the input is improper

3.Volume broken and breaking sound when turn loud?

A,The power input is insufficientconfirm the wiring is correct firstand the supply current is

sufficient,

B. The speaker itself has poor performance or damage and the speaker power is toc small or

too large.

C.left and right channel speakers(+)(-) output are independent can not be connected to each

other

4. Speaker broken sound when subwoofer amplifier volume turn loud?

A.The nower innut is insufficient. first confirm the wirinn is correct. the sunnly current is

enough

B.Whether the power of the speaker itself is too large or too smallor the bass performance of

the speaker itself is poor: the structure of the speaker box these abnormalities will cause

breaks

5 The volume power is not enough?

Power and power supply voltage. the amplitude of the sound source sianal the size of the

speaker impedance are all relatedany kind of deficiencywill affect the power

6. Will the amplifier be burnt?

A,The positive and negative poles of the power supply are connected reversely; the power

supply voltage is too high,exceeding the limit operating voltage of the board

B. If the board requires a DC power supply, it is not allowed to connect directly the AC transformer power

supply (this can be rectified and converted to DC power before it can be used)

C.To confirm that the wiring is correct,then connect with the power supply. The wrong line

connected or the short circuit both will cause damage to key parts!