Superlux HD 662F EQ settings
Parametric EQ correction for the Superlux HD 662F, derived from measurements by oratory1990. It moves the measured frequency response toward a neutral target.
How the HD 662F sounds before EQ
Measured against a neutral target, the HD 662F comes out bass-light. The low end sits behind neutral, so the sound is lean.
The sub-bass region, rumble and the weight under kick drums, sits about 3.9 dB behind neutral, so kick drums lose their weight. The air region, openness at the very top, sits about 2.3 dB forward of neutral, so the very top sounds airy and open (measurements this high up vary between test rigs, so treat the exact number loosely). The mids region, vocals and most instruments, sits about 1.6 dB forward of neutral, so vocals push ahead of the mix.
The largest deviation runs to about 3.9 dB, which is impossible to miss. This model benefits clearly from correction.
These figures are read from the correction itself: whatever the EQ lifts, the headphone lacked, and whatever it cuts, the headphone had too much of. The target is the community's neutral reference, and how far above 10 kHz you can trust any measurement varies by rig. More bass-light models.
The correction curve
The solid line is the full measured correction (all 10 filters). The dashed line is what Atrium applies: the same shape at 65 percent strength, capped at 6 dB per band, so the headphone keeps its own character instead of being forced flat.
What the EQ fixes
The biggest moves in this correction, and what they do:
- The filter at 5.79 kHz cuts the sibilance range by 14.9 dB with a narrow band (Q 5.18).
- The filter at 60 Hz cuts the bass punch region by 7.4 dB with a medium-width band (Q 1.13).
- The filter at 105 Hz lifts the bass punch region by 7.3 dB with a shelf.
The preamp of -6.4 dB offsets the boosts so nothing clips at full volume.
Parametric EQ settings
Preamp: -6.4 dB (prevents clipping from the boosts below)
| # | Type | Frequency | Gain | Q |
|---|---|---|---|---|
| 1 | Low shelf | 105 Hz | +7.3 dB | 0.70 |
| 2 | Peaking | 1.16 kHz | -3.4 dB | 1.66 |
| 3 | Peaking | 60 Hz | -7.4 dB | 1.13 |
| 4 | Peaking | 5.79 kHz | -14.9 dB | 5.18 |
| 5 | Peaking | 5.58 kHz | +5.7 dB | 1.06 |
| 6 | High shelf | 1 kHz | -2.8 dB | 0.70 |
| 7 | Peaking | 217 Hz | +1.5 dB | 2.39 |
| 8 | Peaking | 128 Hz | -2.0 dB | 4.11 |
| 9 | Peaking | 520 Hz | +1.7 dB | 6.00 |
| 10 | Peaking | 2.56 kHz | -1.0 dB | 4.43 |
This is the full measured correction in AutoEq format. It pastes straight into Equalizer APO or Peace on Windows, and into most parametric EQ apps.
How to use these settings
Manually: enter the preamp and each filter into any parametric EQ. On Windows that is usually Equalizer APO with the Peace interface. On a Mac, eqMac or SoundSource. Set the type, frequency, gain and Q exactly as listed.
With Atrium: pick your HD 662F in the app and it applies a tuned version of this correction: 65 percent strength with a 6 dB per-band cap, which fixes the rough spots without erasing what the headphone does well. Atrium also measures how you hear with a short listening test and layers your personal hearing profile on top. Two people with the same headphones do not hear the same sound. Headphone corrections are part of Signature Edition; the app itself is free.
HD 662F vs other Superlux models
Bass and treble are each model's average distance from the neutral target in that range. Positive means more than neutral, negative means less.
| Model | Signature | Bass vs neutral | Treble vs neutral |
|---|---|---|---|
| HD 662F (this page) | bass-light | -2.0 dB | +0.1 dB |
| HD 651 | bass-light | -4.5 dB | -1.9 dB |
| HD 660 | bright | -2.2 dB | +2.2 dB |
| HD 660 Pro 150 Ohm | near-neutral | +0.7 dB | +0.4 dB |
| HD 668B | bass-light | -2.8 dB | +0.4 dB |
Headphones that sound similar
Closest matches across all 4,332 measured models, by distance between their deviation curves. Useful if you like how the HD 662F is tuned and want alternatives.