A classic pairing with that Marantz would be a set of Large Advent loudspeakers.
........... Exactly what I had circa mid 70's to early 80's...... Except I forgot the model number of the Marantz, but it was in a wood case and the front end looks like a twin of that one pictured. Back then my holy grail speakers would have been something from Klipsch, but the Advents were no slouch.
