I bought a yamaha HTR/5740 the salesman said i could i could hook up my sansui AU-717 AMP TO apreout witch i cant locate also i dont have any instructions to sansui there is a switch on its(sansui) rear that says(pre power amp) that has 3 positions (connected,direct coupled,capacitor coupled)i do not no what this is any help appritiated thanks

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