wish i never learned about stereo pre’s - ignorance is bliss.But crappy sound isn’t.
How do u use avr preouts.Just run a pair of interconnects from the front L/R preouts of the NAD to an unused input (or HT Bypass if there is one) on the stereo preamp. You can continue to use the NAD for HT duties, but it’ll be completely out of the signal path for 2-channel, which is what you want. Best of both worlds in one system.