Room Correction with Subwoofer crossover?

[Atlas B170]

Hi, I've got a setup with an Amp, a pair of bookshelf speakers and a powered sub. Currently, I have the crossover frequency set to 100 Hz. When running room correction, should I set the frequency range to start at 20 Hz, or at the crossover frequency of 100 Hz? Initially I thought to run it from 20 Hz with the sub active, but it says this in the "Optimizing Your Audio Experience: A Comprehensive Guide to Room Correction" page at the Wiim Help Center:

• If you are using a subwoofer, enable the Subwoofer Calibration setting.
  
  
• Check your subwoofer's crossover frequency and ensure the start of the frequency range for correction is above this crossover to avoid incorrect adjustments for your room's acoustics.

That makes it seem like I should set the room correction frequency to start at 100 Hz (the crossover). Sorry if this is a dumb question; thanks in advance for any helpful responses.

 

[Vladetz]

above this crossover

This is wrong
Set correction range to the lowest frequency your sub can actually play

 

[rccarguy]

This is wrong
Set correction range to the lowest frequency your sub can actually play

That is correct.

Also if the Wiim does any boosting, disable those filters. Only apply reduction, no boosts.

 

[harkpabst]

• If you are using a subwoofer, enable the Subwoofer Calibration setting.
  
  
• Check your subwoofer's crossover frequency and ensure the start of the frequency range for correction is above this crossover to avoid incorrect adjustments for your room's acoustics.

This is contradicting and wrong, indeed.

Originally, room correction with enabled subwoofer integration returned unsatisfying results, so RC was limited to frequencies above the crossover frequency.

Later WiiM gave us the option to either include the subwoofer calibration or not. If you decide to do so, it's completely pointless to then limit the frequency range for RC to higher than the crossover frequency.

Make sure to use the LFE input of your subwoofer, not the line input, if it has one. If there's no LFE input, set the frequency selector on your sub as high as possible.

The WiiM room correction algorithm now allows to set different limits for cut and boost. The default values work pretty well in my experience. While some dips cannot be filled by boost for acoustical reasons, others can. The final assessment measurement will tell you if the boost did anything good or not. Only if the dips remain unchanged even after applying some boost I would consider to disable this filter manually.

 

[Atlas B170]

Thanks for the replies. I'm already using the LFE input on the sub with the onboard crossover set to the highest setting (LFE) so that the Wiim Amp handles crossover duty. I'll set my RC to start at 20 Hz since my sub goes down to 19 Hz according to the manufacturer. None of my RC filters have ever added more than a +3 dB boost so I'm not worried about needing to set a limit; it's mostly bass cuts since my speakers are rear-ported and unfortunately I can't move them more than a few inches from the wall. I've bunged the ports and set the crossover a little higher than I normally would to try to compensate.

 

[harkpabst]

Thanks for the replies. I'm already using the LFE input on the sub with the onboard crossover set to the highest setting (LFE) so that the Wiim Amp handles crossover duty. I'll set my RC to start at 20 Hz since my sub goes down to 19 Hz according to the manufacturer. None of my RC filters have ever added more than a +3 dB boost so I'm not worried about needing to set a limit; it's mostly bass cuts since my speakers are rear-ported and unfortunately I can't move them more than a few inches from the wall. I've bunged the ports and set the crossover a little higher than I normally would to try to compensate.

Sounds perfectly fine to me. Looks like you're all set.

Edit:
I'd like to mark the answer given by @Vladetz as the solution to your question, assuming you will not disagree.