Sennheiser HD800 Certificate for Frequency Response Arrived - Page 14

I didn't request mine yet, the graph should look like this:

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Sound change after burn-in ... so those graph are worthless IMO.

Long overdue, but here's my graph - just arrived in the mail:



Mine's not completely flat, but it definitely has character.

Please prove that. I'd like to see some measurements taken at 0 hour and after 400 hours, and I'd bet you money that it doesn't change. Your brain is burning in. Any burn-in on the part of the driver, if it occurred at all, would be so minor you would see no difference on a measurement.

just got mine. seems a tad different at the lowest frequency.

Hi all,
I received mine by airmail just a few days ago.

Attachment 28244

Looks a bit rough but my HD800 still sounds better than other cans I have.
Clearly it's worth more than the 16 Yukichi-san bills(160Kyens) I paid for these cans!

ps I'm a first timer here, it's nice to be able to join this community. thanks

Mine (also serial in the 5xxx range) looks pretty much like this one than all the flatter ones everyone else has posted. Maybe the later ones are not as flat, or the measuring equipment setup slightly changed.

bcwang, thanks for responding.

I noticed the appearance of the certificate is different from earlier ones.
Mine looks like this:
Attachment 28245
Also the graph doesn't have "ticks" for +/-2.5dB, +/-7.5dB, +/-12.5dB and so on.

Maybe someone at Sennheiser made wrong scaling when they made the new graph format.

Yes, I noticed that too, I wonder if it is a scale problem. Seeing how none of the older graphs reached close to +5db or below 0db, and how both yours and mine reach +5db around 100hz and dip below 0db at the lowest point. I wonder if something has fundamentally changed in the later serial # HD800s. In any case, it sounds great.

The newer graphs have a slightly different scale and I'm seeing a more consistent pattern in terms of their balance. The newer ones seem to have a bit more bass and not as flat a treble response (might be a good thing). Mine sounds pretty smooth and sufficiently bassy to me. The previous owner of my HD800s said the same thing compared to other HD800s he had heard. Here's my graph:

 

Edited by Shahrose - 5/19/10 at 5:56pm

Are you guys pulling these charts from a website or are they your own pictures taken of the graph sheet?

 

I said in my post that it's my own :)

Maybe I should have communicated better.  I understand that is the graph for your specific HD800.  That is pretty apparent.  What I was trying to ask was did you pull that chart off the web somewhere or did you take a picture of it with your own digital camera and then post it?

 

The reason I ask is because I have #360 and my chart looks different from the 5401 above.  It's a completely different layout and it doesn't have a signature on it.  My graph is also different.  There is no line across at 0 and my range from top to bottom goes from 30 down to -28.  Not the 25 to -20 range like all the graphs I see above.  Since all those above look the same I assume you guys might be pulling them from a website.

I scanned it from my certificate (hardcopy). I don't think the graphs are available online. I also mentioned earlier that the scales have changed on the new graphs. In terms of the certificate layout, mine looks identical to the one 2SC945 posted in post #204 above, signature and all.