seme lab sdv 1005 - 600p

Ive recently got hold of some seme lab sdv 1005 - 600p and sdv1015-600.

I did some digging and found out they are 300 and 600 watt audio class D Amp modules.Unfortunatly they have been used before therfore i dont know the state of them.

Has anyone had any experiance with these ?

Here's a data sheet