[ttys0]

Then what is it?

Biocellulose is cellulose produced by bacteria. While it's structurally similar to the cellulose found in plants, it's also a very different kind of material. It works well as a speaker diaphragm since it has a favorable balance of being both lightweight and stiff.

 

[haasaaroni]

Hmm interesting take. What is it about the Auteur that you preferred them over the HD600?

It's not as shouty in the upper midrange, and has a lot more extension on both ends. So the tonality is a few steps closer to "natural" and "balanced" to me. Along with the better technicalities, like soundstage, imaging, impact, resolution, etc.

 

[Nkam]

Biocellulose is cellulose produced by bacteria. While it's structurally similar to the cellulose found in plants, it's also a very different kind of material. It works well as a speaker diaphragm since it has a favorable balance of being both lightweight and stiff.

Ah, thanks

 

[JM]

What is the best source for Sennheiser OEM parts (headband padding, earpads, etc.)?

 

[blochsidisco]

What is the best source for Sennheiser OEM parts (headband padding, earpads, etc.)?

Sennheiser

Or Thomann, if you’re in Europe

 

[Nkam]

Sennheiser

Or Thomann, if you’re in Europe

Thomann is good.

They recently are sending me a new pair of ear pads for my beyers since the ones they sent me last year had a defect. I got two pairs so that’s why I delayed opening one sooner. But they honored it and are sending me a replacement pair.

 

[WilcoRoger]

Then what is it?

If the biocellulose in question is actually bacterial* cellulose, than quite a bit

https://en.wikipedia.org/wiki/Bacterial_cellulose

Due to its high sonic velocity and low dynamic loss, bacterial cellulose has been used as an acoustic or filter membrane in hi-fidelity loudspeakers and headphones as marketed by the Sony Corporation

* I guess "bacterial" is not something your marketing department would want to use

 

[LanceSaintPaul]

What is the best source for Sennheiser OEM parts (headband padding, earpads, etc.)?

Audio Sanctuary in the UK has parts, sometimes things not available @ Sennheiser. Make an account with them:
https://www.audiosanctuary.co.uk
I have bought multiple items from them.
Thomann has the best headphone stands - bought multiples from them, too.

 

[MisterMudd]

Okay so I just broke out my HD6XX from the closet. It's been a long time since I used them. I also have an HD600 and more recently got a set of ZMF Bokeh and Aeon 2 Noire. I got a fresh set of pads for my HD600 as well. I swapped the Dekoni pads back to the the HD6XX. Does it make sense the HD6XX has more low end than the HD600?

Yes, since it's the Drop version of the HD650. I tweak my pair slightly more with the Schiit Loki Mini to even better improve the bass. Love 'em - especially for the price.