So, I am a life long audiophile who has never had a good pair of headphones (embarrassing isn't it?). Anyway I am looking for advice from this group as to what you would recommend to use in conjunction with a low power vintage Sherwood 7100A or Marantz 2220B receiver (15 to 20 watts max)? I don't need to listen at high levels - but would like clean, accurate, and detailed sound. Thanks in advance.
There's no way even an HE-6 needs that much power for normal listening levels. I would recommend the Sennheiser HD600 or HD580, as their sound signature aligns closely with your requirements. Haven't heard any of the Hifiman planars, so I can't honestly recommend them.