Hi there, I have been experimenting quite a bit with passive summing in the past, but I am no technician and I get easily lost/confused when dealing with formulas.
Having just got an 8 extra outs from my adat, I decided to expand my DIY passive mixer to 16 ins. What happened next was that the DAC (Aphex A141) had a much louder signal than the Motu 828, when both drive the passive mixer's 10K input resistors.
Now I came up with the decision to put 3K resistors on the 828 dedicated channels instead the 10K, is that "healthy" to have a summing network with different load resistors?
The volumes almost match now, but I wonder hot to calculat the right shunt value for the outputs that will load my mic preamp. Obviously the same value I used before (202 ohm I think it was) it's too small.
Having just got an 8 extra outs from my adat, I decided to expand my DIY passive mixer to 16 ins. What happened next was that the DAC (Aphex A141) had a much louder signal than the Motu 828, when both drive the passive mixer's 10K input resistors.
Now I came up with the decision to put 3K resistors on the 828 dedicated channels instead the 10K, is that "healthy" to have a summing network with different load resistors?
The volumes almost match now, but I wonder hot to calculat the right shunt value for the outputs that will load my mic preamp. Obviously the same value I used before (202 ohm I think it was) it's too small.