I have to say that has not been my experience. I don't own the Butler, but I did spend several weeks with one recently and have to say that it was a wonderfully resolving amp. Of course, resolution, like any sonic characteristic, is system dependent and in the wrong system, I can imagine the Butler (or any amp) not being able to resolve such differences. But that certainly wasn't my experience.
Your best bet is to just try one in your system and see what you think. I think you'll find the time spent with it well invested.
Your best bet is to just try one in your system and see what you think. I think you'll find the time spent with it well invested.