What brand is most recognized by non-audiophiles?

Beyond all doubt, Bose.

I guess I should rephrase a bit. I am not looking for what brands the masses associate with high end (i.e.Bose), but what audiophile respected brands are likely the most well known. For example, MBL is obviously a very high end brand, but very few have ever heard of them.

Maybe Harmon Kardon. McIntosh has certainly been consistent over the decades.

Now I really don't understand your question!

In your example the brand does not need to be an audiophile brand. In fact one could argue that ONLY an audiophile would know an audiophile brand very much like only an Oenophile will know the best wines.

So whatever brand is perceived as Audiophile to the masses is the brand that works in your example.

Unfortunately, I agree with those who have said Bose. Their marketing campaign is second to none in convincing the masses that they are very high end. Also, their ability to keep their overly high priced equipment from being discounted also, IMO, adds to the perception of it being an exclusive, high end, audiophile type product.