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The WiiM Sub Pro supports built-in RoomFit^TMRoom Correction to optimize bass performance according to your room's acoustics. This article will guide you through the Room Correction process.

What's RoomFit^TMRoom Correction

RoomFit™ Room Correction improves bass performance by compensating for your room’s acoustics. It fine-tunes the WiiM Sub Pro’s output using advanced audio processing to reduce boomy, muddy, or uneven bass caused by reflections, furniture, and placement. The result is tighter, clearer, and more balanced bass throughout your listening space.

Before You Begin

1. Room and Device Preparations

Ensure your WiiM Sub Pro is properly placed and set up. For details, refer to How to Set Up Your WiiM Sub Pro and A Practical Guide to Room Correction for Enhanced Sound Quality.
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.

2. Configure Room Correction Parameters

Go to the RoomFit^TM Settings page in the WiiM Home app and configure these parameters based on your preference:

Target Curve: Defines the target frequency response that your WiiM Sub Pro tries to match after Room Correction. Choose the desired frequency response curve from B&K, Harman, Flat before Room Correction.
Smoothing: Reduces minor fluctuations in the frequency response to help focus on overall trends and prevent overcompensation. You can choose a value from the following ones:

1/3 Octave Smoothing: Balances detail with overall trends.
1/6 Octave Smoothing: Retains more detail while maintaining readability.
1/12 Octave Smoothing: Provides highly detailed adjustments for fine-tuning specific areas.

For a configuration guide, refer to A Practical Guide to Room Correction for Enhanced Sound Quality.

Other parameter settings as below are fixed and cannot be changed:
  - Freq: 30.0 to 110.0HZ
  - Max Gain: 5.0 dB
  - Min Gain: -5.0 dB
  - Max Q: 5.0
  - Cut-Only Mode: On (Let you lower frequencies, reducing room resonances and unwanted responses for a more balanced sound.)

  - Built-in Mic Compensation: On

Step-by-Step Guide to RoomFit^TMRoom Correction

Open the WiiM Home app.
Go to the Devices tab and locate the WiiM streamer paired with your WiiM Sub Pro.
Tap the icon to directly open your WiiM Sub Pro settings.
Select Subwoofer RoomFit^TM, then tap Run RoomFit^TM.
Tap Next to start the Room Correction process.
Tap Play Sound to start an audio check.
Tap Start Tuning to begin the acoustic measurement, then evaluate the results.
You can also review the RoomFit™ result from the curves below:
- Yellow curve (Target): The desired frequency response that RoomFit™ aims to achieve.
- Gray curve (Raw): The measured frequency response of your speakers and room before RoomFit™.
- Pink curve (Equalization): The EQ adjustments that RoomFit™ makes to correct the variations.
- Cyan curve (Predicted): The predicted frequency response after RoomFit™ correction is applied.
When the Final Assessment page appears, review the actual RoomFit™ result from the curves below:
- Yellow curve (Target): The desired frequency response that RoomFit™ aims to achieve.
- Gray curve (Raw): The measured frequency response of your speakers and room before RoomFit™.
- Cyan curve (Actual): The actual frequency response after RoomFit™ correction is applied.

If the cyan curve closely matches the yellow curve within the adjustable range, the RoomFit™ result is effective. If there are large differences, tap Adjust Again to re-run RoomFit™.
Tap Save Profile to save the RoomFit™ results as a custom profile. Alternatively, tap Skip to save into the Auto profile.
Once the profile is saved, tap Done to complete.