Wayne Parham Messages: 18795 Registered: January 2001
Illuminati (33rd Degree)
If I understand you properly, you want to be able to connect both left and right together to your headphone amp's input, but you want them to be isolated to go to another parallel set of RCA jacks as a pass-through connection. If that's the case, I would suggest using a series resistance between each channel and the amp's input. That will isolate the channels from each other so that separation is maintained.