Hello, please need Connection Diagram Eyebrid 4Y80

Hello, have someone a connection diagramm of the amplifier EYEBRID 4Y80. I have a problem with it. Channel 1 und 2 have a strong rush. I don´t know why. The amplifier is at a power supply 13,8V / 10A and with a mp3 player I played some music. Your hear a very strong rush, when the music plays. If you need some picture from the amplifier, I will send it to you by email. Please send me your email address.

Best regards Jörg