Room Correction with Subwoofer crossover?

Atlas B170

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Joined
Jan 15, 2024
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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.
 
  • 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.
 
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.
 
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.
 
I just wanted to ask the same question as the initial poster and the forum then led me to this thread. So I will just reply here. :)

In my case my subwoofer has a separate room correction function through a dedicated app. So I would assume this would be the best approach for me:

1. run room correction for my subwoofer itself through its dedicated app
2. run room correction for my main speakers using the WiiM Home app with subwoofer-calibration set to off starting above the set crossover frequency

Am I right? Or would it be better to disable room correction on my subwoofer directly and let the magic all be done by the WiiM Home app?
 
@Djinn206

I was previously using an Anti-Mode 8033 to room-correct my subwoofer, so I went with your option 2, but I set the range a bit into the subwoofer's since at the crossover point it is helpful to use the room correction to help blend the sub to the speakers (so for example with 80Hz crossover, set WiiM RoomFit to correct from 70Hz to 500Hz).

-Ed
 
@EddNog

My main speakers are able to play down to 30 Hz (-6 dB) respectively 32 Hz (-3 dB), but I have crossover frequency set to 75 Hz at the moment. You would suggest room corrections for the mains starting from 65 Hz upwards anyway?
 
Of course there is high pass filtering applied to the mains through subwoofer activation in the WiiM Home app. My question was if I should run room correction just for the mains starting at 65 Hz.
 
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