I'd like to put together a mixer for 3 mono inputs and 3 stereo inputs plus a stereo effect send/return.
I've found the following schematic that I'd like to adapt for this project:
http://www.all-electric.com/schematic/simp_mix.htm
which comes with a nice write up, so I think I have a pretty decent grasp on everything that's going on here.
Adding another mono and another stereo input is straightforward. For the effects loop though, I'm not sure what's the best/proper way to implement it.
I'd need another unity gain amp for the send, right? Here's how I'd think to implement it:
use SPDT (mono) or DPDT (stereo) switches for each input to divert the signal path after any panning/balancing to the effect send. The signal path would then go to a unity gain amp (just like the ones for the main channels) then to an output jack. The return would then go have an input jack that receives the return signal, and this would sum at the node leading into the main channel unity gain amp.
Questions:
Should I have a diode at the effects return to protect the pedals/make it work properly?
The effects return could re-enter the circuit post-unity gain amp. Should it go there? Why or why not?
How mono-friendly will my stereo effects loop be? If I only have a mono effect in the chain, will the use of summing cables be sufficient to make it work as expected? Is there an elegant way to add a "MONO" button that will turn the loop into mono?
Thanks for reading.
I've found the following schematic that I'd like to adapt for this project:
http://www.all-electric.com/schematic/simp_mix.htm
which comes with a nice write up, so I think I have a pretty decent grasp on everything that's going on here.
Adding another mono and another stereo input is straightforward. For the effects loop though, I'm not sure what's the best/proper way to implement it.
I'd need another unity gain amp for the send, right? Here's how I'd think to implement it:
use SPDT (mono) or DPDT (stereo) switches for each input to divert the signal path after any panning/balancing to the effect send. The signal path would then go to a unity gain amp (just like the ones for the main channels) then to an output jack. The return would then go have an input jack that receives the return signal, and this would sum at the node leading into the main channel unity gain amp.
Questions:
Should I have a diode at the effects return to protect the pedals/make it work properly?
The effects return could re-enter the circuit post-unity gain amp. Should it go there? Why or why not?
How mono-friendly will my stereo effects loop be? If I only have a mono effect in the chain, will the use of summing cables be sufficient to make it work as expected? Is there an elegant way to add a "MONO" button that will turn the loop into mono?
Thanks for reading.