I know we have the vintage ortho thread (https://www.superbestaudiofriends.org/index.php?threads/the-vintage-ortho-thread.2340/) but I couldn't find a more general discussion on vintage headphones ... So I created this one. In the fickle headphone world characterised (here maybe less than elsewhere) by fads and fanboyism last week's drop can almost be regarded as vintage. But I am talking about out-of-production designs that stood the test of time and may be interesting or even collectable as a result. As an arbitrary qualification guideline I would suggest 10 years since production stopped. Instead of chasing the ever more expensive tippy top of headphonedom I like to explore the variety that older designs have to offer. So I have AKG K1000 (bought as a reference for soundstsge, transparency, dynamics, etc.), Sennheiser HD540 (one pair used weekly, the other in NOS condition as a pure collector's piece), and a pair of 70's Technics planars (novelty value only) that was DOA. Or at least dead after cleanup. So which old headphones do you have, and why?