I got good results with the Pass XA25 and Tekton Lore Ref BEs (about 89db free air sensitivity).
Great amp but I wouldn’t recommend it for speakers any less efficient, unless one has a small near-field setup.
Can’t comment on other Pass amps but it’s interesting that since I’ve listed my XA25 for sale, multiple potential buyers have told me it’s the best sounding of all Pass amplifiers.