There are 2 options to make sure that this defective set from the market after you receive the new one and it is tested:
option 1: Please return the defective kit the return address for sending the defective amplifier is:
JVBDigital Oppostore
De Windturbine 7
Warehouse 607
3815 KP Amersfoort
Option 2 : Or send us photos clearly showing that the defective kit is
has been disabled