Sony,
I'm no tech, so I can't give you a thorough explanation.
But from my understanding of what's at work here, I'd assume you're right that if say one amp had an input impedance of 27Kohms and the second were 47Kohms the resulting 74Kohm seen by the preamp would work out well in most situations. Especially considering that some solid state amps have input impedances of 100Kohms. At least this is the case with the BAT VK3is that have both RCA and XLR outputs.
Hopefully, Pass Labs will get back to you soon.
I'm no tech, so I can't give you a thorough explanation.
But from my understanding of what's at work here, I'd assume you're right that if say one amp had an input impedance of 27Kohms and the second were 47Kohms the resulting 74Kohm seen by the preamp would work out well in most situations. Especially considering that some solid state amps have input impedances of 100Kohms. At least this is the case with the BAT VK3is that have both RCA and XLR outputs.
Hopefully, Pass Labs will get back to you soon.