Does anyone out there know if the model 7000 receiver has the dual differential pair on the amp input, like the Eight, AU-666-999? I've read through some past threads that say the 7000 and Eight were built around the same time and share some similarities but that there are also notable design differences and was wondering if they have the dual diff pair in common. My apologies if this has been covered elsewhere. I guess I'm also wondering if the Eight Deluxe retained the dual diff pair. I'm not the most technical person but would appreciate anyone's insight.