The Massdrop edition of the legendary HD 650 — tuned for extreme tonal accuracy. With EQ correction applied it reveals exceptional imaging precision and driver detail that cheaper dynamics miss. Requires a DAC/amp for full performance.
These filters are applied first — they flatten Sennheiser HD 6XX's frequency response to neutral. A game-specific footstep boost layer is then added on top. Both are baked into the downloaded config.
| # | Type | Frequency | Gain | Q |
|---|---|---|---|---|
| 1 | LSC | 105 Hz | +4.7 dB | 0.70 |
| 2 | PK | 80 Hz | -6.6 dB | 0.38 |
| 3 | PK | 1285 Hz | -1.1 dB | 2.44 |
| 4 | PK | 2130 Hz | +2.5 dB | 2.22 |
| 5 | PK | 2606 Hz | +0.6 dB | 5.28 |
| 6 | PK | 3166 Hz | -0.4 dB | 6.00 |
| 7 | PK | 4151 Hz | +2.5 dB | 4.39 |
| 8 | PK | 5377 Hz | -0.6 dB | 5.14 |
| 9 | PK | 7744 Hz | +4.3 dB | 0.86 |
| 10 | HSC | 10000 Hz | +5.5 dB | 0.70 |
Headphone correction + game-optimised footstep boost, combined into a single Equalizer APO config file. Enter your email, pick your game, download — done.
Requires Equalizer APO on Windows. Free to install.
Each link below is a dedicated page with the combined HD 6XX correction + game footstep profile — filter table, setup instructions, and direct download.
General game pages: Counter-Strike 2 →Valorant →Apex Legends →