Yeeco 2.1 Channel 2x80W+100W Digital Power Amplifier Board, 24V DC, 3.5MM Audio Input, Surface Mount, 260W Output, Part Number SP-CRIDS84315

Product information:
Power supply: DC 12-24V
Output power: 50W*2 100W*1(Subwoofer)
Output load: 4-8Ω
Respond range: 14-100KHz
SNR: 100db
Channel amount: 3 (left+right+subwoofer)
Switch frequency: 1.2MHz
Weight: 136g
Size: 100mm*70mm*30mm (length * width * height)

Please note that noise will happen in these situation:
(1)Hardware problem:
-Power supply is not sufficient or not stable;
-Using switch power supply
-Using transformer as power supply and without shield & isolation; wdo not avoid interference
-Local at the environment with electromagnetic interference
-Audio input has its own problem
(2)Software problem:
-Audio driver setting
-Music Player effects setting

Solution:
(1)Hardware problem-> The power supply should not be placed too close to the amplifier board in order to avoid electromagnetic interference. It is better to use high quality power supply which offers stable power. If you use power transformer, using an iron sheet to cover the transformer is highly recommended.
(2)Software problem-> When you connect the amplifier to telephone or computer, you can turn off the special effects software or sound card driver effects settings. Using the software after making sure they will not take effect on the sound effect.

Package:
1*Power Amplifier