Good day,
I need some basic help on an audio mixing circuit please.
Scope- I have 2 audio devices each with stereo headphones output. I want to take each into a project box (mono to an xlr- left/ right pin 2. pin 1/3 shorted to each other for ground). Each needs an independent volume control. The signals post volume pot need to be combined to goto 2 outputs. 1 output is another volume pot to a headphone jack. The other straight to an xlr connection as an output to an external powered speaker i have (no volume control needed).
I have a 4.7k pot for the first stage volume for each input with a 10k resistor on the output leg. The signals are all soldered together then sent to another 4.7k pot for the headphone control and straight from the headphone pot input to the xlr output for connection to the power speaker (headphone volume should NOT control the volume that goes straight to the xlr output). The circuit works except for when I crank up the headphone volume the 2 inputs are drastically reduced. Also I am losing overall gain in the circuit which I am thinking is because of too high Ω volume pots for the inputs. I know there is a very basic concept here that Im missing. Anyone help? I would love to not have to power this circuit.......Thank you in advance for any help
I need some basic help on an audio mixing circuit please.
Scope- I have 2 audio devices each with stereo headphones output. I want to take each into a project box (mono to an xlr- left/ right pin 2. pin 1/3 shorted to each other for ground). Each needs an independent volume control. The signals post volume pot need to be combined to goto 2 outputs. 1 output is another volume pot to a headphone jack. The other straight to an xlr connection as an output to an external powered speaker i have (no volume control needed).
I have a 4.7k pot for the first stage volume for each input with a 10k resistor on the output leg. The signals are all soldered together then sent to another 4.7k pot for the headphone control and straight from the headphone pot input to the xlr output for connection to the power speaker (headphone volume should NOT control the volume that goes straight to the xlr output). The circuit works except for when I crank up the headphone volume the 2 inputs are drastically reduced. Also I am losing overall gain in the circuit which I am thinking is because of too high Ω volume pots for the inputs. I know there is a very basic concept here that Im missing. Anyone help? I would love to not have to power this circuit.......Thank you in advance for any help