I'm thinking of buying a pair of Sennheiser HD 650s. However, much of what I have read suggests using then with a separate headphone amp. For a variety of reasons I would prefer not to go down that route and also none of my local dealers hold the 650s in stock so I can't test them with such a headphone amp.
Has anyone experience of using these or similar headphones direct from one of the more powerful vintage Beomasters - I have both the BM 4400 and the 8000 - and how did it compare with using them with a separate headphone amp?
Cleve