Hey guys. Finally, I got around to assembling my own console. I already have ideas for channels and circuits for them, but the most important element is missing - the summing circuit. A mixer without a summing circuit cannot be a mixer. Yes, I certainly know many passive circuits of the simplest summing circuits based on potentiometers and 5 resistors. But this is not what I need. I wanna get vintage warm and flash sound and I am looking for active or passive summing circuits from SSL, API, Neve, Neumann, Studer. If you have such circuits or know where to find them - please tell me. Or can you tell me how the adder works, not necessarily the actual diagram, the main thing is to understand the essence and create something of your own based on it.
I've also heard about such a scheme:
Each channel has a neve 1272 or Neumann preamp at the input of the combiner, and then a fader and resistor based circuit that combines all channels into one signal. The idea as to me is not bad, but only for the section of groups, that is the sum of 4 groups in one channel or master channel, and then stereo isolation and output amplifier. But I need a summarizer for the channels as well. To be able to select the group to which the summarized signal will be sent. What can you say about it?
I've also heard about such a scheme:
Each channel has a neve 1272 or Neumann preamp at the input of the combiner, and then a fader and resistor based circuit that combines all channels into one signal. The idea as to me is not bad, but only for the section of groups, that is the sum of 4 groups in one channel or master channel, and then stereo isolation and output amplifier. But I need a summarizer for the channels as well. To be able to select the group to which the summarized signal will be sent. What can you say about it?
Virtual earth summing (current summing) is the standard approach - it can be single-ended or differential. https://www.electronics-notes.com/a...amp/virtual-earth-mixer-summing-amplifier.php