Sennheiser HD600 - Oluv's “natural” target EQ V0 (Patreon)

Here you can find my "final" flat EQ for the HD600 as EqualizerAPO file and with adjusted settings for the Qudelix 5K to get more or less the same result from both.

The EqualizerAPO file has 2 optional filters at the very end which you may want to activate if you still hear well past 18khz, as they reduce the 19khz peak of the HD600 and should make the overall treble sound smoother.

Keep in mind that I tried to stay as faithful to "neutral" as possible throughout the entire frequency response not trying to enhance any range, but your result may vary depending on your ear, unit etc. It may take a while to get used to a rather flat response if you were used to headphones with boosted treble full of peaks.

Please let me know how this works for you and which adjustments you personally need to apply for a better result. I may fine tune it for myself a little bit more. The smallest adjustments can have a big impact on how smooth treble will be rendered in the end. I cannot guarantee the same effect will be also hearable to others, but so far I am quite satisfied with the result, it sounds way closer to a speaker spectrum than all my previous attempts. I wonder how you perceive it.

In future I may readjust my target even more once I get a better neutral reference. It would appear to me that the 3khz region may need some slight boost, as the Nubert X3000 seem to have some slight dip in that area.

EqualizerAPO:

# HD600 - Oluv's flat target 04.01.2023

Preamp: 2.2 dB

Filter: ON LSC Fc 32 Hz Gain 7 dB Q 0.6681

Filter: ON PK Fc 190 Hz Gain -3.5 dB Q 0.6

Filter: ON PK Fc 1445 Hz Gain -5.4 dB Q 1.4

Filter: ON PK Fc 2650 Hz Gain 2.1 dB Q 0.385

Filter: ON PK Fc 3468 Hz Gain -5.7 dB Q 3

Filter: ON PK Fc 6658 Hz Gain -4.6 dB Q 3.5

Filter: ON PK Fc 10200 Hz Gain -4.5 dB Q 4

Filter: ON PK Fc 12710 Hz Gain -9.8 dB Q 10

Filter: ON PK Fc 14720 Hz Gain -4.3 dB Q 7

Filter: ON PK Fc 5000 Hz Gain -2.5 dB Q 7

Filter: ON PK Fc 5700 Hz Gain 1.4 dB Q 1.5

Filter: ON PK Fc 10740.6 Hz Gain 1 dB Q 2

Filter: ON PK Fc 7250 Hz Gain -2.5 dB Q 5

Filter: ON PK Fc 1688 Hz Gain -1 dB Q 5

# optional HF filters

# Filter: ON HSC Fc 12450 Hz Gain 8 dB Q 0.6681

# Filter: ON PK Fc 18720 Hz Gain -17.5 dB Q 1

Qudelix 5K: