Room correction

[DG77]

Subwoofer bypass mode.


That's unconventional, indeed. The resulting low pass filter slope will most likely be something between 36 and 48 dB/octave then. Unless you enable subwoofer bypass mode.

If you care about that sixty-something Hz dip and it remains, no matter what crossover frequency you pick, then probably the only way to really change this is to relocate the speakers and/or the sub and/or your main listening position. Playing with different filter settings might help, but it's all hit and miss.

Yes, I did it because there was a dip just before the crossover frequency and it was almost completely removed when I let the sub include a few frequencies above it.

I did try different crossovers but just the sub alone or main speakers alone did not help it.

 

[harkpabst]

Yes, I did it because there was a dip just before the crossover frequency and it was almost completely removed when I let the sub include a few frequencies above it.

I did try different crossovers but just the sub alone or main speakers alone did not help it.

Yes, it's certainly possible that this can occur and be mitigated by overlapping. It's just a bit tedious and works best if the sub implements a digital filter or a very high quality analogue low pass filter. Unfortunately, with many subs the filter setting also influences level and even filter steepness.

It also involves a fair bit of measuring experience, so WiiM's default solution to just allow symmetrical high pass and low pass filters is easier to handle and suited to most users.

For those who want to go the extra mile and experiment, the possibility to manage the overlap from within the WiiM Home app would be nice. I just see the risk that some less technically inclined users would try "unconventional" settings because somebody said it's "better" on the Internet without even trying the default, first. OTOH, since we now have Subwoofer Bypass Mode and Main Speakers Output Bass this risk is already there, so giving us independent high pass and low pass settings would be the next logical step.

 

[FunkeyMunky]

"Subwoofer bypass mode" on

as we say in Denmark: "Nåååå..på DEN måde...."

 

[FunkeyMunky]

That could be due to your room, perhaps a large piece of furniture like a couch or similar.

Also what is your cross-over frequency for the sub set to?

In my case, highly unorthodox most likely, I set a "lower" crossover in the Wiim for the sub (70Hz) and enabled full range out to sub, and a slightly "higher" in my sub (80Hz), In my opinion this makes for a smoother transition and it "filled" in some voids without having it "high" enough in the sub to get any sounds that could be positioned (voices or etc.)

It's worth a try, I did before and after measurements with "Housecurve" and it both looks better and sounds better.

Maybe I'm missing something here: When I enable "Subwoofer Bypass Mode" then the Wiim crossover frequency has no effect right?

 

[harkpabst]

Maybe I'm missing something here: When I enable "Subwoofer Bypass Mode" then the Wiim crossover frequency has no effect right?

The low pass filter is disabled. The high pass filter for the mains is still applied.

 

[hgo58]

Maybe I'm missing something here: When I enable "Subwoofer Bypass Mode" then the Wiim crossover frequency has no effect right?

Not to the subwoofer but still to the main speakers.

 

[Vignus]

as we say in Denmark: "Nåååå..på DEN måde...."

as we say in Italy: "What the heck does that mean?"

 

[DG77]

Yes, it's certainly possible that this can occur and be mitigated by overlapping. It's just a bit tedious and works best if the sub implements a digital filter or a very high quality analogue low pass filter. Unfortunately, with many subs the filter setting also influences level and even filter steepness.

It also involves a fair bit of measuring experience, so WiiM's default solution to just allow symmetrical high pass and low pass filters is easier to handle and suited to most users.

For those who want to go the extra mile and experiment, the possibility to manage the overlap from within the WiiM Home app would be nice. I just see the risk that some less technically inclined users would try "unconventional" settings because somebody said it's "better" on the Internet without even trying the default, first. OTOH, since we now have Subwoofer Bypass Mode and Main Speakers Output Bass this risk is already there, so giving us independent high pass and low pass settings would be the next logical step.

Of course this should not be the first method of attempting a "fix", you are correct.
But since I can both measure and have a quite critical listening ear, this method worked for me and made it sound better then just using "regular" crossover and depend on the steepness/db per octave cut off set by it.

 

[DG77]

as we say in Denmark: "Nåååå..på DEN måde...."

I am from Sweden myself, so: "Ja men precis!"

 

[DG77]

Maybe I'm missing something here: When I enable "Subwoofer Bypass Mode" then the Wiim crossover frequency has no effect right?

As HGO said only on the main speakers (are low pass filtered) so you need to set the Crossover "Manually" on your SUB (higher than the one set in Wiim app), which was my point in trying to "overlap" some frequencies for a better response in your room.

 

[newuser2025]

Hi! Any advice on room correction. I am a happy owner of the Wiim Ultra. As a total inexperienced person, I tried to take a measurement with my Samsung smartphone with the default values of the Wiim home app and the result is what you see...if I understood correctly, the white line is my room...how does it look? The value of the high frequencies seems very excessive to me at 8k. I don't think my system is that unbalanced on high frequencies. My advice: I would like to get an external microphone and I read a lot about the Dayton Imm6. Is there a difference if I choose Jack or USB-C? Are both okay?

I used the mini dsp umik1 with a calibration file. I had the mic from my other stuff that uses dirac, it made a huge difference. I tried it with my phone a few times and it sucked, but holy cow, with the mic it's as good as dirac to me