72466e3b   
   From: phil_a@tpg.com.au   
      
      
      
      
   However, if the impedances are   
   different the source voltage will not remain the same as soon as it is   
   hooked up to the load ! In fact, it will drop significantly.   
      
   ** Wot absurd drivel.   
      
      
   If we   
   take an audio signal generator (and most of them have nominally 600   
   Ohm output impedance) and set it at 0.775V level (open circuit). Now   
   let us connect a load (resistor of some other value,say 75) across and   
   measure the output voltage. It will NOT be  0.775V any longer: in an   
   average piece of test equipment this level WILL drop if the load is   
   anything DIFFERENT than source impedance.   
      
   ** Totally off with the fairies.   
      
   The voltage level will always  DROP   
      
   NO  MATTER  WHAT  THE  LOAD  IMPEDANCE  IS  !!   
      
      
   If the load is higher than 600 it may not be as pronounced.   
      
      
   **  The bats in this loon's  belfry are having a party.   
      
      
   Consumer grade audio manufacturers build whatever they   
   think is right and just leave it to the public to find out (by trial   
   and error) what the true signal levels in their gadjets are...   
      
      
   ** Total crap.   
      
   The line voltage levels quoted by makers of consumer audio gear are based on   
   a simple assumption  -  ie that the load impedance as specified or is   
   WITHIN   the range of values found in consumer audio gear,  ie at least   
   10kohm.   
      
   The source impedance values used are low enough that the output level is not   
   significantly affected by such a load.   
      
   This has been ** standard practice **  for over 60 years and it still amazes   
   me how many fools like this posturing  ASS have not caught up with it.   
      
      
      
   ....   Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)