ruffrecords said:I just simulated the first stage. -3dB point is 124Hz. SLope is a gentle 3dB/octave until the inductor kicks in around 20Hz and it increases to 6dB/octave. Definitely no presence boost.
Cheers
Ian
I am guessing that the Dialog EQ (first stage) would not have the boost, but that the Film Loss EQ (second stage) might. I'm sure you caught the drawing error with all those parallel R/C parts. Since there are ten wires coming from the rotary switch it only makes sense that they would be switched as well. Also worth noting that the inductor label shows the values at 10KC.
Mike