Yes; I listen to music flat; no equalization , normally (good speakers and fair acoustics can allow this). also without subs ('though I may try one, again this weekend)
Traced the intermittent shutdown issue to my sony 4k player (once again; after numerous failures; I find that s**y is still a four letter word...
Panasonic UB820K, on order, should be here today.
Crown amp (XLI 800) installed, using the front L&R pre-outs on the Denon; Does not hurt, nor help the sound, significantly (using my back up blue ray player); as far as I can tell; during a very short listening session last night.
Life is looking up...
THANK YOU! all for your time and suggestions...
Enjoy!