Sennheiser HD 660S

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Overall

#568 in

Headphones (Over / On Ear)

according to Reddit Icon Reddit

Sentiment score44% positive
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Last updated: Apr 20, 2026

Reddit Reviews

Reddit IconDavejohnsonott
4 months ago

Have to disagree - have the 660 S2, & it’s more like 600, 650, 6XX on Hi Res sources. They have the mods warmth of the other 6 series, with extended bass & better defined treble & air. It’s a perfect all rounder & not muddy like the others. Like the other 6 series though, it doesn’t have the soundstage of the 8 series, but very, very pleasant for long listening sessions. Not for critical listening so much, but the detail is all there 660 S1 was definitely a miss, S2 is a hit & my daily driver.

Reddit IconAdAdditional8414
6 months ago

hd660s. I love both its strength as well as its weaknesses, making it my favourite pair of gears

3 months ago

shp9500, makes me value good mids over boosted bass. Now I'm happy with both my hd660s and hd620s. I also got a few pair of iems which are great, but never actually use anymore. Still wondering if I should sell them lol

3 months ago

full sized. I pick my hd660s and even my hd620s over my ier m9 anytime

Reddit IconBetaLancerOfDawn
3 months ago

Awesome! This just might be my Dreams setup! I have the momentum 4 right now but i would love to upgrade to the HDB630 didt you have a momentum 4 before this? And at home i am rocking the sennheiser hd660s but i was looking into the D1!

Reddit Iconbootysauce12
about 2 months ago

try to find refurbished sennheiser hd660s, i got mine refurb for $300 from the sennheiser outlet, and they are amazing, great for mixing, great for games

Reddit IconBuckieJr
4 months ago

I’ve had the Audeze lcd-x and sold them for both the lcd2 and lcd2 closed. LCD X are fantastic but I can get what I like outa the lcd 2 for 99% of what I use my headphones for, they sound so similar for most things just a little less bass imo, and the other 1% the lcd2 closed does its job (stupid lots of bass lol) I’ve had the sennheiser 660s and gave them to my best friend, I always felt like I was going to break them, But they sound great. I have both the hifiman sundara and sundara closed, these were replaced with my Audezes. They sound good for the price you can get them today but I like my audezes more. I also have the Moondrop Venus, those sit on a stand and I don’t use them. They weigh a damn ton and are no better than a sundara in sound but they’re beautiful lookin lol.

Reddit IconChanceImagination456
4 months ago

The right earcup always fall off the hinge and the material on earpads starts deteriorating after 6 months of daily use. I used to like these headphones but not anymore because build quality is bad. I switched to Sennheiser 660s and a usb mic.

Reddit Iconchrews
5 months ago

Yeah I'd also go Sennheiser. I don't know what material they use for the 6xx series but my 660 feels so light and flimsy yet survived quite a few potentially fatal accidents without a scratch. Close second would be Beyerdynamic. I would use my DT770s to hammer in a nail no questions asked.

Reddit IconCriticismJust9271
4 months ago

I had a similar journey, starting with gaming headsets like the JBL Quantum 910X and Logitech Pro X2. Around mid-2024, I began exploring Hi-Fi and studio headphones, first with a Fiio K11 and a pair of HD660S, then upgrading to the HD660S2. I eventually settled on the closed-back DT1770 MK2 paired with a Fiio K19 as my daily drivers, and they’ve been excellent. I also own a pair of DT 900 Pro X open-backs and have been tempted to swap them for the DT1990 Pro MK2.

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