For sale is the Sennheiser HD6xx headphone in mint condition (Massdrop Edition). They are manufactured in Ireland in the Sennheiser factory and are identical to the HD650 except for the color (midnight blue) and the cable (6 feet with 3.5mm connector and 1/4" adapter). I purchased the headphones in January 2019 to compare side-by-side with my long-time favorite HD600's on both tube and solid state amplifiers. Both headphones are outstanding and do particularly well with tube amplifiers. After a month-long comparison I decided I still prefer the neutrality of the HD600 over the warmth of the HD6xx but this is purely personal taste.
I have perfect feedback on Audiogon since 2004 so you can buy with confidence. I
will pay for shipping within the continental USA and
no Paypal fees if my asking price is met. Here is a chance to own an awesome set of headphones at a bargain price!