I haven't. I just assumed he wouldn't be able to help since he's in the US and I'm in Sweden.
Sennheiser HDVD800 Headphone Amplifier - Page 106
Gear mentioned in this thread:
There is a firmware update (version 1.04) for the HDVD800 itself. The last I looked on Sennheiser's website, they only had the Mac OS version of the firmware installer, so you would need a Mac to install it on your HDVD800. According to the website at that time, a PC version is coming.
Now as far as "the drivers for windows", this is just a USB driver that support USB Audio class 2.0 and is not really unique to the HDVD800 other than the fact that Sennheiser provides it with the HDVD800. There is nothing on Sennheiser's website about any driver software that I have seen. Not sure why there would be as the driver software that comes with the HDVD800 seems to work ok. At least I've not heard any complaints about it.
If what you are really asking for is the firmware fix, see my older post at:
Edited by wisemanja - 9/25/13 at 9:47pm
It's the same firmware load, just with an installer for a different OS. If you have a friend with a Mac of some type, you could get them to do the download from Sennheiser's site and then just plug your HDVD800 into their Mac's USB and run the installer