Gunter Steinhart monoblocks help

[mahleu]

I have a pair of these solid state beasties, is there any servicing info around? Trying to fing out what chips are in there, STKs of some sort but someone sanded the info off...

 

[Andre Vermeulen]

 

[croak]

 

[mahleu]

 

[manetino]

 

[mahleu]

 

[Hug.er]

 

[ghostinthemachine]