How to think about room correction settings like frequency range and gain?

[Fralle]

The mic calibration would affect both channels equally. You can easily check by setting the calibration file to "none".

I'll try that later

I just dont understand what could have changed the right channel so much since the last room calibration, cause the room is exactly the same.

 

[slartibartfast]

I'll try that later

I just dont understand what could have changed the right channel so much since the last room calibration, cause the room is exactly the same.

Microphone position?

 

[Fralle]

Microphone position?

Same listening position, nothing has changed. For now I'll just go back to the old one I did before the calibration file. The new one just sounded terrible. Like Beats headphones filling the room...

 

[slartibartfast]

Same listening position, nothing has changed. For now I'll just go back to the old one I did before the calibration file. The new one just sounded terrible. Like Beats headphones filling the room...

Since microphones normally roll off at low frequencies I would expect less bass when using the calibration file since the measured response will need less boost or more attenuation to reach the target. Can you show screenshots of room correction measurements with and without the calibration file?

 

[Fralle]

I just deleted it and I forgot to take a screenshot of it. I'll make new once later and post here.

 

[Fralle]

I did try it again now calibrated and uncalibrated and the difference seem very small

Calibrated


Not calibrated



Old one not calibrated (four weeks ago) that sound the best to me



Absolutely nothing has changed to explain the difference from then to now. The differences in the left speaker is way more subtle.

 

[slartibartfast]

I did try it again now calibrated and uncalibrated and the difference seem very small

Calibrated
View attachment 17450

Not calibrated

View attachment 17451

Old one not calibrated (four weeks ago) that sound the best to me

View attachment 17452

Absolutely nothing has changed to explain the difference from then to now. The differences in the left speaker is way more subtle.

Did you reduce the the maximum volume by changing the volume limit in "Audio Settings"? This prevents clipping caused by the boost applied by room correction. If you don't you may get distortion and the boost is higher in the two recent measurements making distortion more likely. There is a thread discussing how to determine the required volume limit using REW.

 

[Fralle]

Did you reduce the the maximum volume by changing the volume limit in "Audio Settings"? This prevents clipping caused by the boost applied by room correction. If you don't you may get distortion and the boost is higher in the two recent measurements making distortion more likely. There is a thread discussing how to determine the required volume limit using REW.

No changes what so ever. Very strange indeed.

 

[slartibartfast]

No changes what so ever. Very strange indeed.

You should reduce the volume limit though.

 

[Fralle]

You should reduce the volume limit though.

Hi

I cant find that thread and this is way above my head. Do you mean I should reduce the volume limit just during the room correction process? I feel completely lost here.

 

[Fralle]

If you don't you may get distortion and the boost is higher in the two recent measurements making distortion more likely. There is a thread discussing how to determine the required volume limit using REW.

But I never reduced volume before either so if this is the reason wouldn't the boost be there in the previous measurement also? Sorry for all my questions but this is getting way to complicated for me sorry.

What should I set the volume limit to?

 

[slartibartfast]

But I never reduced volume before either so if this is the reason wouldn't the boost be there in the previous measurement also? Sorry for all my questions but this is getting way to complicated for me sorry.

What should I set the volume limit to?

Here is a method to calculate the headroom needed and the volume limit required.

O

Post in thread 'PEQ talk'

Nov 9, 2023

Download REW, apply your PEQ settings, read the required headroom, divide it by 0.6 and you will get the minimum required percentage value to use for the volume limiter.

• onlyoneme

• 

 

[slartibartfast]

Hi

I cant find that thread and this is way above my head. Do you mean I should reduce the volume limit just during the room correction process? I feel completely lost here.

Reduce the volume limit after the room correction process.

 

[net23]

Quick question - when doing room correction in Wiim, what is the optimal volume to set on the device controlling the volume in the room. In my case, my Wiim Ultra is set to max fixed volume and connected to my amp where I control the volume to the speakers/sub. Are there any instructions as to how to get the best room correction observations (I'm using iPhone w/ a Dayton Audio iMM-6C along with the downloaded calibration file.) Room is an apartment living room. I do have a db meter to set the volume specifically if I wanted to. Thanks!

 

[Fralle]

Quick question - when doing room correction in Wiim, what is the optimal volume to set on the device controlling the volume in the room. In my case, my Wiim Ultra is set to max fixed volume and connected to my amp where I control the volume to the speakers/sub. Are there any instructions as to how to get the best room correction observations (I'm using iPhone w/ a Dayton Audio iMM-6C along with the downloaded calibration file.) Room is an apartment living room. I do have a db meter to set the volume specifically if I wanted to. Thanks!

Iv'e just assumed your normal listening level setting would be optimal. But this is a great question for the experts out there.

 

[harkpabst]

Quick question - when doing room correction in Wiim, what is the optimal volume to set on the device controlling the volume in the room. In my case, my Wiim Ultra is set to max fixed volume and connected to my amp where I control the volume to the speakers/sub. Are there any instructions as to how to get the best room correction observations (I'm using iPhone w/ a Dayton Audio iMM-6C along with the downloaded calibration file.) Room is an apartment living room. I do have a db meter to set the volume specifically if I wanted to. Thanks!

There are no hard and sound instructions on the volume. You might go by these guidelines:

• The higher the level, the better the signal-to-noise ratio of the measurement, so higher is generally better.
• If you here furniture rattling during the swipe, reduce the level. RC cannot compensate for such non-linear defects.
• Don't use a level that feels uncomfortable to you, don't go over the top.

 

[kjell.bjornfors]

I have a pair of rather unusual speakers that are quite obscure outside of Sweden. They are Carlsson speakers, designed with all drivers pointing upwards to create an omnidirectional sound effect.

About a meter diagonally above the right speaker, there is a wall-mounted bookshelf, and about a meter to the side, there is a storage unit. The left speaker, on the other hand, has completely free space both above and to the side.

Far from optimal which if why I think room correction seem to help quite a bit. When we move I hope to get a more optimal placement for both speakers and hopefully it can work without room correction. I'll include pictures with and without the grille so you can get a better idea.

I have several Carlsson speakers in my house. OA-14 like yours and OA-5 typ2, OA-6 typ2 and OA-2212. They all work after the same pricple ”ortho accoustic ”but sound completely different in the same room. I think you only can use room correction under 400 Hz with those speakers because they use reflections in the room at mid and high frequencys to fill the room. Excellent speaker because you don´t have any pool position. They sound almost the same wherever you are. A negativ issue is that itś hard to hear where in the soudpicture different instruments are.
I did some initial measurements with one pair and did what I could with the room nodes itself first. When I had reduced the node impact I did some new measurements and use PEQ to correct the curve. But the big first measurement is compensated mecanicly.

 

[Fralle]

I have several Carlsson speakers in my house. OA-14 like yours and OA-5 typ2, OA-6 typ2 and OA-2212. They all work after the same pricple ”ortho accoustic ”but sound completely different in the same room. I think you only can use room correction under 400 Hz with those speakers because they use reflections in the room at mid and high frequencys to fill the room. Excellent speaker because you don´t have any pool position. They sound almost the same wherever you are. A negativ issue is that itś hard to hear where in the soudpicture different instruments are.
I did some initial measurements with one pair and did what I could with the room nodes itself first. When I had reduced the node impact I did some new measurements and use PEQ to correct the curve. But the big first measurement is compensated mecanicly.

Interesting to read. I was a bit hesitant about using room correction with these speakers at first. Given their orthoacoustic design, I was concerned that applying correction might actually work against their intended purpose.

That said, I did end up trying it, and in my case, I found that room correction made a positive difference. I stuck with the default setting, which applies correction up to 4000 Hz, and that worked well for me—helping to clean up room interactions while still preserving the speakers’ natural character.

Out of curiosity, I also experimented with limiting the correction to just 400 Hz just now after reading your post, but unfortunately, that was a disaster in my setup. The treble became almost unbearable—harsh and piercing to the point where it was really uncomfortable to listen to. So for me, the broader correction up to 4000 Hz turned out to be the better approach. Did you change any other settings like Gain and Max Q. I am still struggling to understand all this.

Would love to hear your thoughts and experiences on this! Have you tested different correction and limits yourself and compared? How did the default setting sound?

 

[Fralle]

Actually I did toggle the FDW yesterday so that might explain the weird resaults I did get. I will try it again without FDW later. After som reading in the forum a lot of people seem to loose to much bass using FDW.