I have had a couple of vintage Pioneer headphones in the past . The last was a pair of Pioneer SE 405 which looks really similar to those. They were built well, (the volume knobs even worked) but really, really heavy. I wanted to like them but I just didn't. They were boxey sounding, had no top end extension, no sub bass, overall a dull, dark sound.

I use to have some Sennheiser HD 425 about 10 years ago. I liked them so much but they wouldn't handle low bass frequencies in modern music. Taking that new music aside, if the source didn't have a large drum beat or excessive bass, they were really good. ** Having said that, the Sennheiser Outlet Store has the HD 560s for $99. The HD560s is a much better headphone than my old HD425.

I got my pair of SR850 about 6-7 years ago on a "close-out" deal of something like $30. They were bought for work, thinking they wouldn't be anything but average. I have to give them credit, they were pretty good sounding.

Interesting that nobody recommends Amazon Music HD....