SOTAMIA 12V YAMAHA Digital Power Amplifier Board YDA138-E Audio Amplifiers 2.1 Amplificador Bass Subwoofer AMP 10W X2+20W Cable Noise

 

Product  description:

Product Name: Audio Amplifier

Chip Type: Class D

Chip Type:

YDA138-E

Supply voltage: DC12V 4A

Standby current: 60ma

Output power: 2*10W+20W (4 ohms)

Output channel: 2.1 channels (left and right channel + bass)

Signal to noise ratio: 88%

Size: 80*60*15MM

Common problem:

1. The volume is turned up and the sound appears to be stuck, intermittently, and the volume can be played normally after the volume is turned down.

A: One of the reasons: due to the power supply is too small, the total output power of this power amplifier board is 40W. When the power is selected, the recommended voltage is DC12V and the current is about 4A.

The second reason: If there is no problem with the power supply, it may be that the power of the speaker is too small. For example, if the output is 20W, only the speaker of 3W is connected. When the volume is turned on, the phenomenon of jamming may occur, and the speaker may be burned out.

2, the noise is too loud when playing music, or there is no noise when playing music.

A: The function signal of the power amplifier board is amplified. The main source of noise is that the radio clutter in the environment is amplified by the power amplifier board, so there will be noise as long as it is the power amplifier board. It is recommended that the audio cable be shielded as much as possible. It is also possible that there is noise in the sound source. Normal mobile phones and MP3s will not be available. Most of them are old preamp boards. They are not compatible with the power amplifier board. You can add audio isolator or coupling capacitor test to see if it can be removed.

Package included: