This is an earlier report from Jack about his success running dual SDR receivers controlled by a single PC. Click on the thumbnail for a larger view.
Last night I began running two SDRs: a general coverage unit connected to the Beverage antennas, and an IF unit connected to the TS-850S. Each goes to a separate outboard sound card, but to the same PC.
The wrinkle was how to manage the audio going from the sound cards to the amplified sound system. I decided to take a hint from W4BXI's approach to audio, and I hooked up a six channel Behringer mixer. It works great! It also looks like the PC will handle both SDRs okay.
Now if I can just get two monitors working like W4UOA...