MagnetoSound
Well-known member
So, I want to build a 12-channel passive, balanced mixer, for tactile monitor mixing in the LR.
I like the look of NYD's idea: http://www.twin-x.com/groupdiy/albums/userpics/balancedmixnetwork.pdf
But I have a slight conundrum.
I will be feeding this mixer from a motu 24IO, which has active differential outputs, and I'm considering whether I might put a stereo pair of outputs on each volume pot - but to do this I will have to unbalance the volume pots.
What will the drawbacks be if I opt for dual 10k pots, with each section configured as a separate voltage divider for left/right?
In other words, wire the input across the pot, parallel the cold side to the mixing network cold and connect the wiper to the mixing network hot.
Obviously the mixing system is no longer fully balanced, but this is for monitoring in the LR, not a final mixing system. Is this likely to cause problems with CMRR in a reasonably quiet environment?
EDIT: Doh! I just realised, it will be fine as long as the source outputs are floating, which I will check into. Even if they're not, I don't expect much problem at +4dBm.
Sometimes we overlook the obvious, no? :
;D
I like the look of NYD's idea: http://www.twin-x.com/groupdiy/albums/userpics/balancedmixnetwork.pdf
But I have a slight conundrum.
I will be feeding this mixer from a motu 24IO, which has active differential outputs, and I'm considering whether I might put a stereo pair of outputs on each volume pot - but to do this I will have to unbalance the volume pots.
What will the drawbacks be if I opt for dual 10k pots, with each section configured as a separate voltage divider for left/right?
In other words, wire the input across the pot, parallel the cold side to the mixing network cold and connect the wiper to the mixing network hot.
Obviously the mixing system is no longer fully balanced, but this is for monitoring in the LR, not a final mixing system. Is this likely to cause problems with CMRR in a reasonably quiet environment?
EDIT: Doh! I just realised, it will be fine as long as the source outputs are floating, which I will check into. Even if they're not, I don't expect much problem at +4dBm.
Sometimes we overlook the obvious, no? :
;D
