The Sennheiser HD 650 over-ear headphones are known for some of the richest sounds from a pair of open back headphones. But at $370 on Amazon, they still come at a high price. Luckily, Sennheiser paired up with Massdrop, a discounted shopping site, to create an upgraded version of the 650s at a much better price.
Right now you can get the Massdrop X Sennheiser HD 6XX for just $199.99 on Massdrop. These bad boys have the same great sound as the 650s, but they're fitted with a detachable 6-foot cable instead of a 10-foot one, so you no longer need to worry about getting tangled in a long cable while you rock out.
It should be noted that because of the open back design, it won’t prevent sound from being heard by those nearby. So you might not want to use them on a train ride or in an open-plan office—unless you want everyone around you to hate you. That being said, they still make for a great at-home headphone especially at this amazing price. The headphones are still in production, so while you won't get them right away, you're guaranteed to get them hot off the assembly line.
Prices are accurate at the time of publication, but may change over time.