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shivster1796 11.6K Views
Jan 27, 2026 12:50 PM

Massdrop x Sennheiser HD 6XX Open-Back Headphones (Midnight Blue)

$149

$200

25% off
+ Free S/Hat Drop
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Drop has Massdrop x Sennheiser HD 6XX Open-Back Headphones (Midnight Blue) on sale for $169 - Extra $20 Off $100+ w/ discount code JAN26 (apply in cart) = $149. Shipping is free.

Thanks to community member shivster1796 for finding this deal

Note, must apply the listed discount code in cart for discount to apply

Editor's Notes

Written by Discombobulated | Staff
  • Price Research
    • This is the best/lowest price available. Previously, we've promoted this deal for $159+
  • About the Deal
    • Revision of the popular all-rounder, the Massdrop x Sennheiser HD 6XX, great sound plus a few updates & highly rated; product is made in Ireland
    • Offer valid while promotional discount/supplies last
  • Additional Details
    • Product is eligible for return within 30 days of delivery (in new, unused condition)

Original Post

Written by shivster1796
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Drop has Massdrop x Sennheiser HD 6XX Open-Back Headphones (Midnight Blue) on sale for $169 - Extra $20 Off $100+ w/ discount code JAN26 (apply in cart) = $149. Shipping is free.

Thanks to community member shivster1796 for finding this deal

Note, must apply the listed discount code in cart for discount to apply

Editor's Notes

Written by Discombobulated | Staff
  • Price Research
    • This is the best/lowest price available. Previously, we've promoted this deal for $159+
  • About the Deal
    • Revision of the popular all-rounder, the Massdrop x Sennheiser HD 6XX, great sound plus a few updates & highly rated; product is made in Ireland
    • Offer valid while promotional discount/supplies last
  • Additional Details
    • Product is eligible for return within 30 days of delivery (in new, unused condition)

Original Post

Written by shivster1796

Community Voting

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Top Comments

TheEdge
9.6KComments
2.6KReputation
These are a great buy at this price. A lot of folks in the "hobby" have this in their arsenal. Can't recall the last time I've seen them new at this price point.
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Community Reviews

The HD 6XX comes across as a classic open back headphone with a sound that lands close to the HD 650 and is especially strong for vocals. It is praised as a rare new deal at this price, with long term durability, easy pad and cord replacement, and a reputation for lasting for years. The main catch is power, since the high impedance makes an amp or capable dongle important, and the clamp can feel tight at first. A solid pick if you want the 650 style sound and can drive it properly.

Common Questions (5)

  • Yes, the HD 6XX has high impedance and is unlikely to be driven properly from a phone or Apple dongle. A dedicated amp or a stronger DAC/amp setup can improve volume and control, and one common pairing is a Bottlehead Crack tube amp for these high-impedance headphones.

    SmilingRiver528captouchseanc9781tylerstravis

  • The HD 6XX is an updated version of the HD 650, and several comparisons found the sound to be very similar or indistinguishable. That makes it a strong value if you want the HD 650-style tuning at a lower price.

    deelseakerseanc9781seanc9781

  • The clamp can feel tight out of the box, and one long-term owner reported it never really loosened enough to stop feeling strong. Stretching it on a stand or object may help briefly, but the pressure can return.

    mookothekingLoooooooooooong

  • Yes, but it needs an add-on mic solution because the headphone uses a dual-wire connection. ModMic is the most common way to add a microphone without changing the headphones.

    d3a1z

  • They can last for years; one pair bought nearly 10 years ago was still working after only needing replacement pads and a cord. The pads and cable are modular, so those wear items are easy to swap.

    Selvayen

AI-generated summary based on comments from the community. Updated ago

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38 Comments

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Jan 27, 2026 2:20 PM
9.6K Comments
Joined Apr 2006
TheEdgeJan 27, 2026 2:20 PM
9.6K Comments
These are a great buy at this price. A lot of folks in the "hobby" have this in their arsenal. Can't recall the last time I've seen them new at this price point.
Jan 27, 2026 2:36 PM
624 Comments
Joined Oct 2003
miken5678Jan 27, 2026 2:36 PM
624 Comments
Picked up the last deal for the 599.
https://slickdeals.net/f/19121770-99-95-sennheiser-hd-599-se-around-ear-open-back-headphone-black-at-amazon

Wondering if I should switch to these, not a huge price increase.
Jan 27, 2026 2:41 PM
10.2K Comments
Joined Nov 2011
deelseakerJan 27, 2026 2:41 PM
10.2K Comments
These are an updated version of HD 650. Great buy at this price.

Sennheiser HD650 Review [wordpress.com]
Sennheiser HD559 Review [wordpress.com]

SoundGuys Drop x Sennheiser HD 6XX review [soundguys.com]
Last edited by deelseaker January 27, 2026 at 06:44 AM.
Jan 27, 2026 2:48 PM
10.2K Comments
Joined Nov 2011
deelseakerJan 27, 2026 2:48 PM
10.2K Comments
Quote from miken5678 View quoted comment :
Picked up the last deal for the 599.
https://slickdeals.net/f/19121770-99-95-sennheiser-hd-599-se-around-ear-open-back-headphone-black-at-amazon

Wondering if I should switch to these, not a huge price increase.
Check out the HD599 review I posted above. It compares the HD599 and the HD650 directly. It finds that the sound is very different between the two. If the return policies are lenient, I'd get both and try them. Or, in the true SD fashion, go for both! Big Grin
Jan 27, 2026 3:11 PM
14 Comments
Joined Nov 2018
zgeistJan 27, 2026 3:11 PM
14 Comments
Is there any way to connect a mic to headphones that have this kind of dual wire connection?
Jan 27, 2026 3:17 PM
349 Comments
Joined Nov 2011
asnigroJan 27, 2026 3:17 PM
349 Comments
Was thinking about picking these up to pair with a new tube amp I got since these have a higher impedance (300ohm) than some other pairs I have. Thanks.
Jan 27, 2026 3:23 PM
2.5K Comments
Joined Jul 2014
bert90987Jan 27, 2026 3:23 PM
2.5K Comments
Does anyone have firsthand experience with the HD6xx compared to the K702? It seems like the K702 has more detail and air. Just curious. Thanks

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Jan 27, 2026 3:41 PM
713 Comments
Joined Nov 2006
d3a1zJan 27, 2026 3:41 PM
713 Comments
Quote from zgeist View quoted comment :
Is there any way to connect a mic to headphones that have this kind of dual wire connection?
Modmik is the most common way.
Jan 27, 2026 3:54 PM
10.4K Comments
Joined Sep 2013
alxshantiJan 27, 2026 3:54 PM
10.4K Comments
Grabbed a pair last year. Have them plugged in to the Receiver's Headphones jack. Seems to work well wondering if any of you using them with an amp. Would that make a significant improvement in sound quality? If so, which amp would you recommend?
Jan 27, 2026 3:59 PM
1.1K Comments
Joined Feb 2016
whitecrane8Jan 27, 2026 3:59 PM
1.1K Comments
Quote from zgeist View quoted comment :
Is there any way to connect a mic to headphones that have this kind of dual wire connection?
Better to get a separate microphone
Jan 27, 2026 4:15 PM
617 Comments
Joined Feb 2006
mookothekingJan 27, 2026 4:15 PM
617 Comments
The clamping force is pretty tight on these compared to all my other headphones. Do these eventually loosen up?
Jan 27, 2026 4:29 PM
180 Comments
Joined May 2006
JloweJan 27, 2026 4:29 PM
180 Comments
Quote from bert90987 View quoted comment :
Does anyone have firsthand experience with the HD6xx compared to the K702? It seems like the K702 has more detail and air. Just curious. Thanks
I'm sure you've checked sites like this, and it's not firsthand experience, but just in case:
https://www.rtings.com/headphones...02/245/332
Jan 27, 2026 4:38 PM
257 Comments
Joined Nov 2008
LoooooooooooongJan 27, 2026 4:38 PM
257 Comments
Quote from mookotheking View quoted comment :
The clamping force is pretty tight on these compared to all my other headphones. Do these eventually loosen up?
They did not ever loosen for me. I had a pair of HD 600 that I would keep on a small basketball when I wasn't using them to try and stretch them out. It would feel good for a little bit on my head but slowly become too much clamping force.

HD 598 for life as the most comfortable headphones. If mine ever die I don't know what I'll do.
Jan 27, 2026 4:51 PM
9.5K Comments
Joined Jul 2006
NattefrostJan 27, 2026 4:51 PM
9.5K Comments
Bought these last year and returned them. I don't notice much difference between them and my Philips. I don't use an amp. Also anyone get 50$ offer through capital one shipping?
2

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Jan 27, 2026 4:54 PM
176 Comments
Joined Feb 2025
SmilingRiver528Jan 27, 2026 4:54 PM
176 Comments
Quote from Nattefrost View quoted comment :
Bought these last year and returned them. I don't notice much difference between them and my Philips. I don't use an amp. Also anyone get 50$ offer through capital one shipping?
Well there is one. These have higher impedance so they need an amp

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