You went from a vintage receiver to a modern integrated that’s quite the sea change. I’d say give it some time maybe a week or two of constant play then throw the Marantz back in the system and see how it compares. You may find it sounds muddy and slow then again you may not. Good luck!
everything sounded great until the upgrade
In short: I loved the sound of my modest system, until I upgraded my amp. Now it sounds pretty horrible. It went from a warm sweet embracing easy-to-listen sound to knives and forks trying to escape from a bathtub.
So...
1. I can just unplug this new amp (used) and sell it
Any other options? I could upgrade my speakers but I have no budget for that.
2. I could sell the speakers and use money to buy used ones that go with the amp.
3. Lastly I could change the source, but was it the culprit - to begin with?
btw - the sound of the "new" amp is decent with my turntable, and terrible with my CD player.
(If I wrote brands and models it would throw the discussion into "A sucks, B is great")