I’m sorry this thread did not go in the direction you would have preferred. The reason may be that there are very few Weiss 501’s out there.
I did a search on the Asylum, which is very easy to do there and where more folks, it seems, list their components. Among the 10s of thousands (0r more?) there, no one lists the Weiss 501. There were about 15 Weiss DACs listed and all were well over 10 years old and discontinued models.
Here there are now 2 responses and one is from a dealer. Nothing prevents further responses. Anyone doing serious research in the future will find it easy to bypass us idiots and find what they’re looking for.
Yes, a "typical" Audiogon thread, and still you keep coming back and contributing, again.