Overview

The WiiM Sub Pro provides the Subwoofer RoomFit™ feature to correct its low-frequency response in your room.

Subwoofer RoomFit™ measures the low-frequency response of your WiiM Sub Pro at your listening position and corrects it to more closely match your selected target curve. This helps reduce boomy, muddy, or uneven bass caused by room acoustics and subwoofer placement.

Subwoofer RoomFit measurement at the listening position

Preparations and Instructions

Before RoomFit™ Measurement

  • Avoid obstructions around the WiiM Sub Pro.
  • Set your WiiM Sub Pro's volume to a moderate level.
  • Close doors and windows.
  • Keep the room as quiet as possible.

During RoomFit™ Measurement

  • ALWAYS remove the protective case from your phone.
  • ALWAYS hold the phone as far away from your body as possible.
  • ALWAYS point the microphone towards the speaker you are currently measuring.
  • ALWAYS avoid obstructions between the microphone and the speaker.
  • ALWAYS place the microphone at ear level (if you sit while listening, use the height of your ears when seated).
  • Microphone Placement: Ensure the microphone, the listener's ears, and the speaker's acoustic center are approximately at the same height.
  • Use an external microphone when available for more accurate RoomFit™ measurements. For details, see Using an External Microphone for RoomFit™.

Step-by-Step Guide

StepsDetails
1. Open WiiM Home app.

Open the WiiM Home app on your mobile device.

2. Open RoomFit™.

Go to the Devices tab > Open the WiiM Sub Pro settings > Select Subwoofer RoomFit™.

Tip: Tap the  icon to directly open the WiiM Sub Pro settings.
3. Configure parameters.

Tap the icon to open RoomFit™ Settings.

Adjust the following settings to match your preferences:

  • Target Curve: Defines the target frequency response that your WiiM Sub Pro aims to match after Subwoofer RoomFit™. Choose from B&K, Harman, Flat, and Subwoofer before running Subwoofer RoomFit™.
  • Smoothing: Reduces minor fluctuations in the frequency response to help focus on overall trends and prevent overcompensation. Choose a value from the following ones:
    • 1/3 Octave: Strong smoothing. Shows overall trends, hides fine details.
    • 1/6 Octave: Balanced smoothing. Good mix of clarity and detail.
    • 1/12 Octave: Light smoothing. Reveals more detail but may look uneven.
    • Variable: Automatically adjusts smoothing depending on frequency. Light smoothing on bass for detail, heavier on treble for readability.
    • Psychoacoustic: Smoothing according to how humans hear. Hides the tiny acoustic bumps that microphones measure but your ears can't actually hear.
    • ERB: Smoothing based on advanced "human hearing" mode. It provides more detail than Psychoacoustic while still considering human perception.
  • Non-Boost Mode: This setting ensures that the sum of all correction values does not exceed 0 dB, preventing distortion and clipping caused by excessive boosting.
Note: Other settings are fixed and cannot be modified. For details about what these settings mean, see Introducing RoomFit™ Settings.
4. Start RoomFit™ process.

Tap Next to start the RoomFit™ process.

Tip: Follow the prompt to rotate your phone 180°, so the bottom microphone faces the speakers for accurate measurement.
5. Audio check.

Tap Play Sound to perform an audio check.

6. Start tuning.

Tap Start Tuning to begin the acoustic measurement, then evaluate the results from the curves below:

  • Target: The desired frequency response that RoomFit™ aims to achieve.
  • Raw: The measured frequency response of your speakers and room before RoomFit™.
  • Equalization: The frequency-response correction applied by RoomFit™.
  • Predicted: The predicted frequency response after RoomFit™ correction is applied.
7. Evaluate results.

Review the actual RoomFit™ result from the curves below:

  • Target: The desired frequency response that RoomFit™ aims to achieve.
  • Raw: The measured frequency response of your speakers and room before RoomFit™.
  • Actual: The actual frequency response after RoomFit™ correction is applied.

If the Actual curve closely matches the Target curve within the adjustable range, the RoomFit™ result is effective. Tap Apply Correction to proceed.

If there are large differences, tap Adjust Again to re-run RoomFit™.

8. Save results.

Tap Save Profile to save the RoomFit™ results as a custom profile. Alternatively, tap Skip to save into the Auto profile.

9. Finish.

Tap Done to finish the RoomFit™ process.

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