Hello
Attempting to build a balanced passive monitor controller using a 10k 4-pole 24 step attenuator with a 4PDT on-off-on switch for input selection/mute and a 4PDT On-On switch for output selection.
Source impedance from DAC is about 100R and monitor amp input impedance is 30K. Both balanced connections. I intend to connect speakers from controller with 5m xlr cables and DAC to controller input with 1m xlr cables.
However I’m having a bit of trouble working out how to implement a Stereo/Mono switch into the design. From what I gather there’s many ways to do this but ideally I’d like to do it with a toggle or rotary switch.
If I were to use a 4PDT switch for instance, could I use a design like this drawing (attached) of the 4PDT 3x4 pin arrangement? Apologies for scribbliness. If so what resistor value would be recommended? 1k?
Or would a design like this rotary switch pin arrangement from a well known passive monitor control design work better/worse?
http://www.audiotechnology.com.au/wp/wp-content/uploads/2014/04/m-s-r-switch-575x201.jpg
I understand this design contains no resistors so presumably the output will jump up 6dB when in mono position. Is there any way I could implement some resistors into this design to account for this?
Many thanks in advance
Attempting to build a balanced passive monitor controller using a 10k 4-pole 24 step attenuator with a 4PDT on-off-on switch for input selection/mute and a 4PDT On-On switch for output selection.
Source impedance from DAC is about 100R and monitor amp input impedance is 30K. Both balanced connections. I intend to connect speakers from controller with 5m xlr cables and DAC to controller input with 1m xlr cables.
However I’m having a bit of trouble working out how to implement a Stereo/Mono switch into the design. From what I gather there’s many ways to do this but ideally I’d like to do it with a toggle or rotary switch.
If I were to use a 4PDT switch for instance, could I use a design like this drawing (attached) of the 4PDT 3x4 pin arrangement? Apologies for scribbliness. If so what resistor value would be recommended? 1k?
Or would a design like this rotary switch pin arrangement from a well known passive monitor control design work better/worse?
http://www.audiotechnology.com.au/wp/wp-content/uploads/2014/04/m-s-r-switch-575x201.jpg
I understand this design contains no resistors so presumably the output will jump up 6dB when in mono position. Is there any way I could implement some resistors into this design to account for this?
Many thanks in advance