Wiim sub pro deep dip at crossover point

[Periperi]

Hi Wiim community

I recently bought a Wiim ultra streamer and Wiim sub pro.
I use an integrated amp to drive a pair of bookshelves.
Ultra rca analog outputs to the amp input. Ultra sub out to Sub pro via supplied rca cable

I have tried crossover frequencies from 80Hz to 110Hz but the assessment always shows a deep dip at the crossover point.

Toggling the phase from 0 to 180 reduced the dip but it’s still more than 6db than either side of the crossover point.

I feel the L/R speakers and sub need to overlap more so the summed response is higher at crossover.

Perhaps a slider to allow low medium high overlap might be useful.

RoomFit applies a high Q filter at the crossover to compensate for this. However a better overlap would avoid this.

Thoughts and workarounds anyone?

 

[DazST]

What's your room layout and sub placement like? The reason I ask is that I've encountered a similar issue with my wiim amp ultra system. My room is a fairly large, open living area with the stereo effectively in one quadrant. I have the left speaker and sub on the far wall side, and the right speaker on the side of the open space (if that makes sense!). One the weekend I was the only one home so had a chance to play around with room correction (using external, callibrated usb mic). Basically I also noticed a drop off in bass around the cross over point, particularly on the right side. This was only partiality addressed with room correction and altering sub volume. Even though it's not considered the done thing, I tried leaving the mains (QA3030i) full range (using the 'mains play bass' app setting) and lowering the cross over a bit. To my ear, this helped to add better bass definition, but I've yet to re-run room fit to see how it effects measurements (will try this weekend if I get a chance). Now I'm not in any way suggesting this is a solution (either for me or you), but it did highlight to me how experimenting and trying things 'outside the norm' can be worthwhile, particularly if you have a far from ideal room like mine!
Anyway, i have no idea if that is of any help, but I'm sure others more knowledgeable than me will jump in and offer you some useful advice.

 

[Periperi]

Hey thanks for your reply.
I saw in another post as well about running the mains full range by that switch.
I don’t see either of knobs in the home app.
When using the Wiim sub pro the setting seem to be different where that setting isn’t visible any more. Its fully integrated via the app.
I’ll post some screenshots of how the app looks when I get home.
Are you using a wiim sub or different brand?

 

[DazST]

Sorry, I overlooked where you said you're using a wiim sub. I'm using a Tonewinner sub 12"

 

[QuarryHunslet]

Hey thanks for your reply.
I saw in another post as well about running the mains full range by that switch.
I don’t see either of knobs in the home app.
When using the Wiim sub pro the setting seem to be different where that setting isn’t visible any more. Its fully integrated via the app.
I’ll post some screenshots of how the app looks when I get home.
Are you using a wiim sub or different brand?

When using the WiiM Sub Pro paired with your WiiM Ultra, certain options are no longer accessible in the Sub Pro settings in the WiiM Home App.

If you want to access these additional options, you will have to unpair your Sub Pro from your Ultra.

 

[QuarryHunslet]

Hi Wiim community

I recently bought a Wiim ultra streamer and Wiim sub pro.
I use an integrated amp to drive a pair of bookshelves.
Ultra rca analog outputs to the amp input. Ultra sub out to Sub pro via supplied rca cable

I have tried crossover frequencies from 80Hz to 110Hz but the assessment always shows a deep dip at the crossover point.

Toggling the phase from 0 to 180 reduced the dip but it’s still more than 6db than either side of the crossover point.

I feel the L/R speakers and sub need to overlap more so the summed response is higher at crossover.

Perhaps a slider to allow low medium high overlap might be useful.

RoomFit applies a high Q filter at the crossover to compensate for this. However a better overlap would avoid this.

Thoughts and workarounds anyone?

Have you actually tried listening to your Sub Pro with your system, or are you simply looking at RoomFit results?
How does it actually sound to you, as that is the most important thing here?

 

[DazST]

When using the WiiM Sub Pro paired with your WiiM Ultra, certain options are no longer accessible in the Sub Pro settings in the WiiM Home App.

If you want to access these additional options, you will have to unpair your Sub Pro from your Ultra.

Really? So you get fewer setting options with wiims own sub than with one from another brand? What's the reasoning for that? It seems somewhat counter-intuitive to me.

 

[QuarryHunslet]

Really? So you get fewer setting options with wiims own sub than with one from another brand? What's the reasoning for that? It seems somewhat counter-intuitive to me.

The Sub Pro can be connected by cable, and not paired to the WiiM device, and then the full options are available.

If the Sub Pro is connected to a WiiM device wirelessly, then this makes two settings unavailable.

This is also the case when the Sub Pro is connected to a WiiM device by cable, and also paired with the WiiM device.

 

[Burnside]

Really? So you get fewer setting options with wiims own sub than with one from another brand? What's the reasoning for that? It seems somewhat counter-intuitive to me.

I’ve raised a ticket and asked WiiM - maybe those settings are dealt with automatically when paired. I’ll post their reply.

 

[Periperi]

Have you actually tried listening to your Sub Pro with your system, or are you simply looking at RoomFit results?
How does it actually sound to you, as that is the most important thing here?

Don’t get me wrong, music sounds great with the wiim sub. Perhaps it could be better so why not chase after better integration at zero cost.

 

[Periperi]

These are the settings when paired with the wiim sub.
I manually added a +3db at 96hz to fill the gap a little. The rest of the filter was generated by RoomFit on the sub.

 

[QuarryHunslet]

Don’t get me wrong, music sounds great with the wiim sub. Perhaps it could be better so why not chase after better integration at zero cost.

That’s perfectly okay, as long as you are happy with the end results.

 

[QuarryHunslet]

I’ve raised a ticket and asked WiiM - maybe those settings are dealt with automatically when paired. I’ll post their reply.

I would also be interested to see this, although I would never need to use these “missing” options.

 

[Periperi]

When using the WiiM Sub Pro paired with your WiiM Ultra, certain options are no longer accessible in the Sub Pro settings in the WiiM Home App.

If you want to access these additional options, you will have to unpair your Sub Pro from your Ultra.

Will the Ultra “forget” all my sub peq/roomfit filter settings if I unpair it? Or are those already programmed into the sub and it can run standalone with the last set of settings?

 

[QuarryHunslet]

Will the Ultra “forget” all my sub peq/roomfit filter settings if I unpair it? Or are those already programmed into the sub and it can run standalone with the last set of settings?

I’m sorry I don’t know that, because I don’t use any “peq/roomfit filter settings” with my Sub Pro.

 

[harkpabst]

I wonder what's inside the "Move Sub" menu.

 

[QuarryHunslet]

I wonder what's inside the "Move Sub" menu.

There’s a pop up box saying “Do you want to move WiiM Sub Pro to another device?”, and the options are No or Yes.

Yes brings another screen “Select a Device”, and there is a list of all WiiM devices that are available on your network, and you have the option to select one.

 

[harkpabst]

There’s a pop up box saying “Do you want to move WiiM Sub Pro to another device?”, and the options are No or Yes.

Yes brings another screen “Select a Device”, and there is a list of all WiiM devices that are available on your network, and you have the option to select one.

Not what I had hoped for.

RoomFit applies a high Q filter at the crossover to compensate for this.

Does the positive gain filter really do anything meaningful in compensating for the dip? If so, then it's OKish to apply it. But if the dip is really caused by acoustic cancellation there's not much to be gained and I'd rather remove it.

However a better overlap would avoid this.

I'm not onvinced, it might, and it might just not.

When you tried different crossover frequencies between 80 Hz and 110 Hz and the dip was always present, did move with the crossover frequency? Did you notice at least a slight difference in how deep it was?

 

[QuarryHunslet]

Not what I had hoped for.

What were you hoping for?

 

[harkpabst]

What were you hoping for?

Something like placement specific settings. Hoping for was a bit much, but I just had expected something a tad more exciting (like lime juice).