Wiim Amp with Polk XT15 & Polk PSW10

[dominikz]

Currently this is what we have with the above-listed setup.
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Thanks, that looks good - just set the delays manually back to 0ms for both the speakers and the sub. The auto sync function seems to be estimating them incorrectly.
I'll look at your physical layout when I'm at my PC to see if there's any chance to optimize placement.
On that note, I see you have a cabinet in the lower left corner. Is the right corner free and could the sub go there?

 

[Vicious]

Thanks, that looks good - just set the delays manually back to 0ms for both the speakers and the sub. The auto sync function seems to be estimating them incorrectly.
I'll look at your physical layout when I'm at my PC to see if there's any chance to optimize placement.
On that note, I see you have a cabinet in the lower left corner. Is the right corner free and could the sub go there?

Sadly not, it has built-in compartments (Racks)

Thanks bud, no rush

 

[slartibartfast]

Currently this is what we have with the above-listed setup.
View attachment 20046

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OK I just checked my Subwoofer synchronization settings. It looks like the displayed latency numbers are the individual measurements for both sub and mains but only one latency is actually entered in the settings, 10ms in your case.

 

[Vicious]

Rigth, crossover, frequency set to 100Hz

 

[dominikz]

Rigth, crossover, frequency set to 100Hz

View attachment 20052

Alright, that is looking much better now!

Plus we now know what remains of the dip is caused by the sub, not by the crossover.

When you did the above measurement was the center of the sub front face (where the driver and the port are) by any chance around 1,0-1,3m away from any of the walls (left/right side wall, or back/front wall)?

 

[Vicious]

Alright, that is looking much better now!

Plus we now know what remains of the dip is caused by the sub, not by the crossover.

When you did the above measurement was the center of the sub front face (where the driver and the port are) by any chance around 1,0-1,3m away from any of the walls (left/right side wall, or back/front wall)?

Had it tucked all the way back there and the wall (corner) closest to it is 50-55cm away

 

[dominikz]

OK, so a simple thing you could try now is to set the subwoofer crossover frequency to e.g. 75Hz and retry.
That should put the crossover below the dip in the sub response so I hope it will remove it completely from the total response.

 

[Vicious]

OK, so a simple thing you could try now is to set the subwoofer crossover frequency to e.g. 75Hz and retry.
That should put the crossover below the dip in the sub response so I hope it will remove it completely from the total response.

I’ll maybe start at 70Hz and do a 75Hz after that? Or would I waste my time haha.

 

[dominikz]

I’ll maybe start at 70Hz and do a 75Hz after that? Or would I waste my time haha.

I think you can try both - it will be interesting to see the results.

I suggested 75Hz just because I see that XT15 are -3dB down anechoically at about 78Hz. But yours are close to a wall so they should get some LF boost from that.

 

[Vicious]

I’ll maybe start at 70Hz and do a 75Hz after that? Or would I waste my time haha.

75Hz

 

[Vicious]

Stupid question and I think we’ve covered it, do I keep the low pass at 160.

 

[Vicious]

75Hz

This does sound a bit more pleasing when I listen to something like Blink 182, Green Day etc. mids and vocals sound bright and vibrant. Drum hits are quite noticeable
Lows, bass particularly isn’t as boomy, but quick subtle thump, I guess adding a +1 db in the sub will help that out.

Edit:

 

[dominikz]

75Hz

Hm, the dip looks worse than having the crossover at 100Hz. It seems to me that 100Hz crossover test gave the best response so far.

Would you be willing to disable the subwoofer completely in the WiiM Home app and re-run RC? Just to see how your loudspeakers measure individually when not crossed over to a sub at all and running full-range. Maybe that will give us some more clues on what else to try.

 

[Vicious]

Hm, the dip looks worse than having the crossover at 100Hz. It seems to me that 100Hz crossover test gave the best response so far.

Would you be willing to disable the subwoofer completely in the WiiM Home app and re-run RC? Just to see how your loudspeakers measure individually when not crossed over to a sub at all and running full-range. Maybe that will give us some more clues on what else to try.

On it captain ;p
Test and results inbound

 

[dominikz]

Stupid question and I think we’ve covered it, do I keep the low pass at 160.

View attachment 20059

Yes, keep the low pass at 160Hz on the sub - the WiiM Amp is handling low pass duties as part of the subwoofer crossover config.

 

[Vicious]

On it captain ;p
Test and results inbound

 

[dominikz]

Ok, here we see the differences in bass response caused by the asymetrical placement in the room. Also - it's really good that you have a sub!

As it is I'd suggest to go with the 100Hz subwoofer crossover in the app and accept the dip that remains.

I'd also suggest to set RC max gain to 3dB - at the moment RC calculates a lot of low gain positive filters which is inefficient.

Lastly we can try to address the brightness of XT15 by modifying one PEQ filter in each channel manually.

 

[Vicious]

Ok, here we see the differences in bass response caused by the asymetrical placement in the room. Also - it's really good that you have a sub!

As it is I'd suggest to go with the 100Hz subwoofer crossover in the app and accept the dip that remains.

I'd also suggest to set RC max gain to 3dB - at the moment RC calculates a lot of low gain positive filters which is inefficient.

Lastly we can try to address the brightness of XT15 by modifying one PEQ filter in each channel manually.

Right, I grabbed earplugs and went for gold at 70% volume and covered a few more

Alright, so maybe 95 or 100Hz in Crossover, gotcha, and in RC set max gain to 3db, check, minimum I'm guessing we keep at -12?

 

[Vicious]

Right, I grabbed earplugs and went for gold at 70% volume and covered a few more

Alright, so maybe 95 or 100Hz in Crossover, gotcha, and in RC set max gain to 3db, check, minimum I'm guessing we keep at -12?

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100Hz and 3db added to the max gain in RC

 

[slartibartfast]

100Hz and 3db added to the max gain in RC

You would be shocked by mine