Assuming all units of model X sound the same is not a safe assumption. Some may operate better than others. Especially older gear and even if work was done on it.
Not saying it’s the amp but not possible to rule that out with the limited facts on hand.
If not happy then try something different and see what happens. The Bel Canto c5i is an integrated that is never inherently bright and can drive most any speaker to modest volume well and would not cost much to try used.
But assuming the amp is working well I like that Krell very much and would hesitate to part with it if it has served me well over the years.
The Tekton Lore would be more special were you using a modest powered tube amp. With the Krell in good operating condition or with other similar quality beefier SS amps, you have unlimited speaker choices that will match up well.
Not saying it’s the amp but not possible to rule that out with the limited facts on hand.
If not happy then try something different and see what happens. The Bel Canto c5i is an integrated that is never inherently bright and can drive most any speaker to modest volume well and would not cost much to try used.
But assuming the amp is working well I like that Krell very much and would hesitate to part with it if it has served me well over the years.
The Tekton Lore would be more special were you using a modest powered tube amp. With the Krell in good operating condition or with other similar quality beefier SS amps, you have unlimited speaker choices that will match up well.