XPost: alt.engineering.electrical, sci.electronics.design, sci.e   
   ectronics.repair   
   From: invalid@invalid.net   
      
   I want to connect the audio out (headphone jack) of 2 computer sound cards to   
   a desktop & woofer speaker-amp combination. (The original input was via USB   
   only and I'm modifying this for analog audio input.)   
      
   This is my guess at the necessary resistors to mix down these 4 outputs to   
   the 3 inputs in the amplifier (L, R, sub):   
      
      
      
   The data sheet for the Philips TDA8510J amp IC shows an application for 2   
   channel input:   
      
      
      
   Suggestions welcome.   
      
   Thanks.   
      
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