Sub phase and roomfit

[P.cote76]

Hello, i try to find the phase setting for my wiim ultra so i set the sub dynch delay at zéro and make 2 measurements with roomfit, one at 0 and another at 180. I try to find wich one is the good setting, i présume is the one with the smaller and narrow dip? My crossover is a 70hz

 

[Wiimer]

View attachment 37692

Hi, I think the first one (0) is the better.

 

[dominikz]

The first picture looks better, yes.

 

[P.cote76]

Ok tanks guys, i tried by ears but the difference is really subtle in my room

 

[rccarguy]

Hello, i try to find the phase setting for my wiim ultra so i set the sub dynch delay at zéro and make 2 measurements with roomfit, one at 0 and another at 180. I try to find wich one is the good setting, i présume is the one with the smaller and narrow dip? My crossover is a 70hzView attachment 37692View attachment 37693

You might also want to try every 45 degrees as well. Or set phase at 0, and let the wiim do it's alignment, then test how that does it.

 

[P.cote76]

When i let wiim do the alignement, it give me a +32ms delay on the sub for the first pic(180) and +31 ms for the second(0)

 

[harkpabst]

You might also want to try every 45 degrees as well. Or set phase at 0, and let the wiim do it's alignment, then test how that does it.

The WiiM phase switch, which in reality is a polarity switch, has only two positions, 0° and 180°.

There's absolutely no need to play with the subwoofers variable phase knob in case there is one. The 0°/180° phase switch and the delay settings are much better suited to the job of aligning mains and sub.

 

[rccarguy]

The WiiM phase switch, which in reality is a polarity switch, has only two positions, 0° and 180°.

There's absolutely no need to play with the subwoofers variable phase knob in case there is one. The 0°/180° phase switch and the delay settings are much better suited to the job of aligning mains and sub.

Or use wiim sub distance /phase/time setting to get spot on

 

[harkpabst]

Yes, polarity (phase switch) and delay (the sync option), that's all you need and what I meant to say.

 

[P.cote76]

Yes, polarity (phase switch) and delay (the sync option), that's all you need and what I meant to say.

Yes ,is what i use. I'm just wondering because the polarity that gives me the best curve is also the one that gives me the longest delay (only 1 ms) between the sub and the speakers

 

[dominikz]

Yes ,is what i use. I'm just wondering because the polarity that gives me the best curve is also the one that gives me the longest delay (only 1 ms) between the sub and the speakers

The auto-sync function is not 100% reliable, so if you get 0ms delay estimate with one polarity setting and 1ms with the other it just tells us that the optimal delay value is somewhere in that ballpark.
Luckily 1ms up or down from optimal won't break sub/speaker integration.

 

[rjp]

There's absolutely no need to play with the subwoofers variable phase knob in case there is one.

Agreed. In fact, this "continuous phase shift" can really mess things up depending on how it's implemented. Best to stick with either 0 or 180 (simple inversion).