the box pro TP218/1600 A

I bought two of this speakers because of the sound quality and kept one as reserve. I scarcely used them because as a mobile DJ, it is too heavy except there is a big event. One of the speakers had power issues after a while and is not turning on. I called Thomann but they couldn't help me and even the power module is out of stock in their shop for a while now. I started using the second speaker and now is having the same issue. I am confused with two big bass boxes that I cannot use and why Thomann keep selling something that they cannot support.