Tell him the gang on A'gon does not think you are a kook and that we will boycott his store (wherever it is) unless good customer service is demonstrated! :^)
Good customer service including ability to audition gear when needed is pretty much the only reason to buy audio gear from a brick and mortar real store any more.
Does the dealer still have the PSBs set up?
If so, maybe listen to them there (or anywhere else/another dealer if possible) and see if you hear anything similar to what you hear at home. Take note of the amp being used and investigate its specs versus yours in terms of ability to drive loads of 4 ohm or less. See if there is any correlation between what you hear there and what you hear at home and use that as a reference point for deciding what to do from there.
Good customer service including ability to audition gear when needed is pretty much the only reason to buy audio gear from a brick and mortar real store any more.
Does the dealer still have the PSBs set up?
If so, maybe listen to them there (or anywhere else/another dealer if possible) and see if you hear anything similar to what you hear at home. Take note of the amp being used and investigate its specs versus yours in terms of ability to drive loads of 4 ohm or less. See if there is any correlation between what you hear there and what you hear at home and use that as a reference point for deciding what to do from there.