Effect of subwoofer/speaker latency settings on frequency response

[slartibartfast]

I have my subwoofer crossover set to 80Hz and phase set to 180 degrees in the WiiM app which seems to give the best subwoofer integration. I made some measurements in REW while experimenting with different latency settings for both sub and speakers. I expected to see the biggest changes at the crossover frequency but that isn't what happened. The biggest changes are above the crossover frequency up to 200Hz. I must be missing something, any thoughts?

 

[MCG555]

I assume microphone is at the exact same position?

 

[canard]

That's normal...it's related to the "recovery" process.

 

[slartibartfast]

I assume microphone is at the exact same position?

Indeed it was

 

[slartibartfast]

That's normal...it's related to the "recovery" process.

Eh?

 

[rccarguy]

I noticed that too when I ran sweeps it effects several locations not just one. So what might look best at the crossover point could look worse elseware, and vice versa.

 

[harkpabst]

I have my subwoofer crossover set to 80Hz and phase set to 180 degrees in the WiiM app which seems to give the best subwoofer integration. I made some measurements in REW while experimenting with different latency settings for both sub and speakers. I expected to see the biggest changes at the crossover frequency but that isn't what happened. The biggest changes are above the crossover frequency up to 200Hz. I must be missing something, any thoughts?

View attachment 34053

View attachment 34054

Could you record the sub and mains output individually, so you can evaluate the effective acoustical slopes of the high pass and the low pass?

 

[rccarguy]

Could you record the sub and mains output individually, so you can evaluate the effective acoustical slopes of the high pass and the low pass?

yeah he needs to do that, I did sub only, left only, right only, both speakers only, sub & both speakers responses

 

[slartibartfast]

Could you record the sub and mains output individually, so you can evaluate the effective acoustical slopes of the high pass and the low pass?

Is it safe to use a WiiM Amp with the speakers disconnected?

 

[canard]

Eh?

"frequency overlap"
Better translate ?
( Google translate)
Ms.....phase

 

[harkpabst]

Is it safe to use a WiiM Amp with the speakers disconnected?

The chip itself has protection against pretty much every error condition one could think of. The output filter will loose the damping provided by the speaker, but this should not be problematic in any way. Certainly not if used just for a couple of minutes.

I have done it with my own WiiM Amp in the past and didn't encounter any issues.