Matt C
Well-known member
I've been studying the signal flow in my console and wanted to get some opinions on a specific detail. In the Program/Bus section, there is a switchable 10dB passive attenuation switch (set to -10dB by default), followed by a non-inverting op amp stage set to about 30dB of gain (see schematic below).
I'm curious whether anyone sees a benefit from removing the 10dB attenuator and adjusting the following op amp for 10dB less gain (around 20dB instead of 30dB). I tested this out and gave it a quick listen and didn't notice any significant decrease in noise, but it still seems silly to me to throw away 10dB of level just to gain it right back up again. FWIW it would be easy to replace those 33K resistors on the bus channels.
I'm curious whether anyone sees a benefit from removing the 10dB attenuator and adjusting the following op amp for 10dB less gain (around 20dB instead of 30dB). I tested this out and gave it a quick listen and didn't notice any significant decrease in noise, but it still seems silly to me to throw away 10dB of level just to gain it right back up again. FWIW it would be easy to replace those 33K resistors on the bus channels.