- Dec 7, 2017
- United States
And that’s why graphs can only tell you so much. There are thousands of audiophiles who can’t take the brightness and treble of the 800. And even with the Helmholz resonator fix for the 800S, that 6k peak is still too much for many. That is a well-known fact that has been known for at least a decade here on head-fi.If you bought the original HD800, you received a certificate from Sennheiser that included the Individual Diffuse-Field Frequency Response graph for your particular headphone. My serial number is in the very low 300s. On my graph, the line is nearly flat throughout at 4 dB. There are strategic 2-4 dB dips at 225 to 275 Hz, 1.75 to 5.75 kHz, and 7 to 9 kHz. The 6kHz "bump" is actually between 5.75 to 7 kHz and it's at 4 dB. In other words, it's in line with the rest of the nearly straight line. There is no bump. On the graph, it looks like a slight bump because of the slight dips before and after.
I have no idea where you got your "6 to 10 dB" bump from. That would place it at 10 to 14 dB. As I said, at 6 kHz, the line is at 4 dB.
If you kept the box and papers for your HD800, then you should have this certificate. IIRC, we had to request the certificate/graph from Sennheiser after receiving our headphone. Did you request it?
Others who purchased the HD800 at that time should be able to verify this info. Their graphs may vary, but not by much. Each set was individually calibrated "by no fewer than 16 acoustic experts . . . over 10 hours."