Product description:
DAC-A1 :
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
DAC-A2:
Product name: DAC-A2
Chipset: MS8412+SA9023+97220+NE5532
PC-USB sampling rate: 24bit/96khz
PC-USB operating system: Windows XP/window7/8/10 / Max OS/MAC/Linux
Fiber/coaxial sampling rate: 24bit192khz
Distortion: 0.01%
Signal to noise ratio: 105 db or higher
Frequency response :20-20Khz (±0.3db)
RCA output level: 2.3V
Treble and bass adjustment range: ±6db
Output power of the headphone amplifier :100mw@32Ω
Headphone impedance: 16-200Ω
Input mode :PC-USB/ Optical fiber/coaxial
Output mode: RCA/ headphone output
Supported devices: Mobile phone, tablet, computer, MP3, TV, etc
Output mode: headphone/active speaker/power amplifier + passive speaker
Power supply: DC5V
Size: 73 * 98 * 33 mm
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!
DAC-A1:
DAC-A2:
