sony TA-N611

BobHol

Old fart
This Sony power amp has my curiosity. From what little I can find it was matched up to a Sony Ta-E611 pre-amp. Besides being connected through normal RCA plugs there was a proprietary cable between the two.
Is this amp worthless without the matching pre-amp and cable?
the attached picture shows the back of the amp
 

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Can someone decipher its schematic? The Amp Control inputs seems to control some relays.
 

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  • amp control.jpg
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