The Headphone Out EQ feature allows you to optimize the sound of your headphones through precise parametric equalization. You can manually enter parameters generated by REW (Room EQ Wizard), AutoEQ, or your own custom filter settings to correct your headphone’s frequency response and achieve a more balanced, accurate, and enjoyable listening experience.


This guideline explains the available parameter sources, how EQ filters work, and how to apply them effectively.

1. Overview of Headphone Out EQ

Headphone Out EQ applies exclusively to the headphone output of your device.


By correcting your headphone’s acoustic characteristics, it helps improve:

  • Tonal balance

  • Detail, clarity, and transparency

  • Listening comfort during long sessions

  • Consistency when switching between different headphone models


This EQ is independent of room acoustics and does not affect speaker playback.

2. Headphone Out EQ Parameter Sources

You can enter PEQ (parametric EQ) settings from several common sources.

2.1 REW (Room EQ Wizard)

REW can generate PEQ filters based on measured headphone frequency responses.

You can manually enter the following REW filter parameters:

  • Filter Type (Peaking, Low Shelf, High Shelf, etc.)

  • Frequency (Hz)

  • Gain (dB)

  • Q (Bandwidth)


This method is ideal for users who perform their own measurements or want complete control over the EQ curve.

2.2 AutoEQ Parameters

AutoEQ provides ready-made EQ profiles for thousands of headphones based on publicly available measurements. These filters can be copied directly into WiiM’s EQ interface.

AutoEQ profiles exist for:

  • In-ear monitors (IEMs)

  • Over-ear headphones

  • Earbuds

Choose the version corresponding to your headphone type to ensure the best match.

2.3 User-Defined Custom Parameters

You may also create and enter your own PEQ filters based on personal listening preference.
This is useful when:

  • You want a specific tonal character

  • You prefer lightweight correction over full calibration

  • You want to adjust the sound for certain genres or listening environments

3. How to Enter Headphone Out EQ Parameters

(Content placeholder — to be completed in a later update.)

This section will include step-by-step instructions for entering filters in the WiiM Home App.

4. Recommended Best Practices

4.1 Avoid excessive boosting

Large boosts (typically above +6 to +8 dB) may cause distortion or clipping.
Whenever possible, reduce unwanted peaks instead of boosting dips.

4.2 Ensure the correct filter type

AutoEQ and REW parameters often rely on Peaking filters, while others use Low Shelf or High Shelf filters.
Using the wrong filter type will lead to inaccurate EQ results.

4.3 Check headphone fit before tuning

Fit has a major impact on frequency response—especially for IEMs.
A poor seal can cause large deviations, particularly in the low-frequency range.

4.4 Avoid double EQ

Make sure no additional EQ is active in:

  • Music streaming apps

  • System audio settings

  • Headphone or manufacturer apps

Only the WiiM Headphone Out EQ should be active to avoid conflicting adjustments.

4.5 Evaluate EQ at normal listening levels

Extremely low playback volumes make EQ changes harder to hear.
Always test your EQ at your typical listening volume.

5. Future Enhancements

Headphone Out EQ currently supports manual parameter entry.
Future updates will introduce:

  • Importing EQ files (TXT / CSV / AutoEQ / REW)

  • Automatic profile loading

  • Built-in presets for popular headphone models