Sennheiser HD650 & Massdrop HD6XX Impressions Thread
Jul 2, 2022 at 8:39 PM Post #45,076 of 45,231

Corti

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Why do these sound so good and feel soooo uncomfortable... I'm hating the head-vice clamping force of these things.. I have had them since xmas but I don't use them much because they constantly try to crush my head.... my DT880 were from day 1 and still are much much more comfortable than these HD6XX's which is a shame.. I am trying to actually wear these more and see if they loosen up.. but no not so far...
You should try the original Sennheiser HD650. It has less clampforce than the 6XX. I had both and its a really noticeable difference.

You can check clamping force values on rtings.com for the headphones they tested.
 
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Jul 2, 2022 at 9:02 PM Post #45,077 of 45,231

RADI0HEAD

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Why do these sound so good and feel soooo uncomfortable... I'm hating the head-vice clamping force of these things.. I have had them since xmas but I don't use them much because they constantly try to crush my head.... my DT880 were from day 1 and still are much much more comfortable than these HD6XX's which is a shame.. I am trying to actually wear these more and see if they loosen up.. but no not so far...
I know what you mean. I very gently bent mine (HD600 & HD650). They're very comfortable now. YMMV
 
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Jul 3, 2022 at 1:43 AM Post #45,078 of 45,231

castleofargh

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If’you’re going to bend something(I most certainly had to), do it only to the metal parts after extending them all the way out. The plastic headband itself doesn’t like being forced.
 
Jul 3, 2022 at 2:59 AM Post #45,079 of 45,231

gefski

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Why do these sound so good and feel soooo uncomfortable... I'm hating the head-vice clamping force of these things.. I have had them since xmas but I don't use them much because they constantly try to crush my head.... my DT880 were from day 1 and still are much much more comfortable than these HD6XX's which is a shame.. I am trying to actually wear these more and see if they loosen up.. but no not so far.
Why do these sound so good and feel soooo uncomfortable... I'm hating the head-vice clamping force of these things.. I have had them since xmas but I don't use them much because they constantly try to crush my head.... my DT880 were from day 1 and still are much much more comfortable than these HD6XX's which is a shame.. I am trying to actually wear these more and see if they loosen up.. but no not so far...
1656807741842.jpeg
The worst clamp for me in this series was the 58X. It was a simple matter to cut a 1 X 2 to a length that would stretch out the band a bit when placed just above the pads (so as not to squeeze down the pads). Pad the ends. Stored it on this brace when not in use for a few weeks, and it was just fine.
 
Jul 3, 2022 at 5:17 AM Post #45,080 of 45,231

hbmorrison

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Why do these sound so good and feel soooo uncomfortable... I'm hating the head-vice clamping force of these things.. I have had them since xmas but I don't use them much because they constantly try to crush my head.... my DT880 were from day 1 and still are much much more comfortable than these HD6XX's which is a shame.. I am trying to actually wear these more and see if they loosen up.. but no not so far...
Get a pile of books or an appropriately sized box and put them between the ear cups. That will stretch them out gently over time without putting too much strain on the headband. Don't stretch the headband itself with your hands - it might snap - although some people have had success fully extending the metal yokes and bending them a bit. I think slow and steady is best though.
 
Jul 3, 2022 at 6:44 PM Post #45,081 of 45,231

jonathan c

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To @hbmorrison: Any thoughts further about the Custom Cans UK modifications to Senn 600 / 650 / 6XX ?
 
Jul 3, 2022 at 9:22 PM Post #45,082 of 45,231

jonathan c

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Evening shift at the ‘Laurel Mountain audio loft’ on Independence Eve (US):
556B37AA-6C37-46E0-875C-A4588F3A7D6D.jpeg
 
Jul 5, 2022 at 5:47 AM Post #45,084 of 45,231

hbmorrison

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To @hbmorrison: Any thoughts further about the Custom Cans UK modifications to Senn 600 / 650 / 6XX ?

I have an xDuoo TA-26 on the way so I am waiting to hear what the HD6xx's sound with it before experimenting.

I'm a little hesitant though because I really like the sound of them as they are. Almost tempted to get a second pair to satisfy my curiosity.... but that would be Bad 😁
 
Jul 5, 2022 at 6:33 AM Post #45,085 of 45,231

Twizzleshnizzle

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Throw my Custom Cans modded HD6XX into the mix as well. This is the V2 mod which is a bit shinier.

There's no denying to my ears that the mod provides a worthwhile benefit. I've also had it on the HD600 (very much worth the increased bass it provides on the 600).
 

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Jul 5, 2022 at 6:38 AM Post #45,086 of 45,231

Twizzleshnizzle

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I have an xDuoo TA-26 on the way so I am waiting to hear what the HD6xx's sound with it before experimenting.

I'm a little hesitant though because I really like the sound of them as they are. Almost tempted to get a second pair to satisfy my curiosity.... but that would be Bad 😁
The HD6XX is so affordable, even if you didn't like the change you could easily sell your modded pair and buy a new set.

I like the 6XX normally, but not enough to have kept it. I like the 6XX modded ALOT... I've kept it.
 
Jul 5, 2022 at 8:51 AM Post #45,087 of 45,231

SHAMuuu

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Throw my Custom Cans modded HD6XX into the mix as well. This is the V2 mod which is a bit shinier.

There's no denying to my ears that the mod provides a worthwhile benefit. I've also had it on the HD600 (very much worth the increased bass it provides on the 600).

That sure is shiny. Did you stuff the donut. doughnut? It looks like you did, thought seem leave it empty like @jonathan c

giphy.gif
 
Jul 5, 2022 at 10:14 AM Post #45,088 of 45,231

jonathan c

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“Real Head-Fiers don’t ‘stuff the doughnut’”…. T-shirt quality slogan 🤣
 
Jul 5, 2022 at 12:55 PM Post #45,089 of 45,231

Twizzleshnizzle

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That sure is shiny. Did you stuff the donut. doughnut? It looks like you did, thought seem leave it empty like @jonathan c

giphy.gif
Hahaha, I did stuff the donut. Well, it came pre-stuffed. Custom Cans provide several foams to adjust the tuning slightly. I just leave it as it was provided.

The V2 mod is beautifully shiny. Was a nice surprise (I bought the 6XX pre-modded as I had a nice discount from them), I expected the copper version.
 
Jul 5, 2022 at 2:05 PM Post #45,090 of 45,231

jonathan c

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Hahaha, I did stuff the donut. Well, it came pre-stuffed. Custom Cans provide several foams to adjust the tuning slightly. I just leave it as it was provided.

The V2 mod is beautifully shiny. Was a nice surprise (I bought the 6XX pre-modded as I had a nice discount from them), I expected the copper version.
The 6XX version is nickel-plated. No difference in taste sound from the copper doughnut backweight.
 

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