Wiim Pro Plus w/sub in 2.1

[dmoss74]

Hi,

My current setup has changed to the following:
Wiim Pro Plus (ethernet) >Fosi Audio ZA3>Kef Q350 w/JBL powered sub

I'm trying to rolloff the Kefs at approximately 80hz and have everything below 80hz go to the sub.

It appears that the wiim app would only do a rolloff of everything below 80hz and have no effective sub 80hz being fed to the PSW. At least that's what it looks like. If I'm missing something, then I'm all ears.

I don't want to add one of those misi dsp units to the system if it can be avoided.

Another option I see (possibly) is getting a couple inline crossover things from FMOD. The problem with those is the rolloff frequencies (70hz or 100hz). I guess I would get the 100 hz model. Maybe the 70.

Outside of using the room correction method in the wiim app, this seems to be my best option. As long as it works.

From there, I'd do my own additional EQ with the PEQ built into the wiim app.

Thanks for any help.

 

[terryforsythe]

Since the WiiM Pro Plus does not have a subwoofer out, you will need an external crossover.

As for crossover frequency, there are some things to consider: The KEF Q350's harmonic distortion and your subwoofer placement.

Given the speaker's harmonic distortion profile, I would lean toward a 100Hz crossover if the subwoofer is placed up front in the general area of the speakers.

If the subwoofer is NOT placed up front in the general area of the speakers, a 70Hz crossover may do a better job at making sure you don't hear where the subwoofer is located. The downside to the 70Hz crossover frequency is that you will be getting more harmonic distortion from your speakers. Will it be audible? I don't know. It certainly will depend on how loud you are playing the speakers. At moderate listening levels with a listening position within a couple of meters from the speakers, I highly doubt you will hear the harmonic distortion.

Here is Amir's review of the KEF Q350 speakers, where you can see the harmonic distortion measurements: https://www.audiosciencereview.com/forum/index.php?threads/kef-q350-speaker-review.13484/

 

[dmoss74]

Since the WiiM Pro Plus does not have a subwoofer out, you will need an external crossover.

As for crossover frequency, there are some things to consider: The KEF Q350's harmonic distortion and your subwoofer placement.

Given the speaker's harmonic distortion profile, I would lean toward a 100Hz crossover if the subwoofer is placed up front in the general area of the speakers.

If the subwoofer is NOT placed up front in the general area of the speakers, a 70Hz crossover may do a better job at making sure you don't hear where the subwoofer is located. The downside to the 70Hz crossover frequency is that you will be getting more harmonic distortion from your speakers. Will it be audible? I don't know. It certainly will depend on how loud you are playing the speakers.

I think the placement issue would mean I should get the 100 hz versions. The sub out comes from the Fosi, so if those inline crossovers work, then that may be what I'm after. I've never tried them, but for 30 bucks a pair, I guess I could take a flyer on them.

thanks for the quick response.

 

[dmoss74]

following up. i got a pair of the fmod 100hz inline crossovers. for where my speakers it (and the horrible room i have for listening) they made an instant, and very good addition. the lfe are now free to do their full job at the sub level.

i may order a set of the 70hz ones, too, just in case i get in a situation where the speakers can get further from the wall.

 

[Inertiaman]

I see you've already arrived at a solution that works for you, but just to highlight another option that others might consider: use a Wiim Mini.

You could setup a "HP" filter in the Pro Plus EQ at 100 Hz (or whatever freq is preferred) which would serve as the high pass filtering to your stereo mains.
Then use a Wiim Mini to connect the subwoofer. Link the Pro Plus and Mini as a group in the Wiim app. You can use the native controls on your subwoofer to low-pass the sub signal from the Wiim Mini, or you can also use a "LP" filter in the Mini to do so. Relative volumes between sub/mains can be adjusted via the Mini or Pro Plus volumes in the app grouping, and/or with the native volume on the subwoofer.

There are limitations to this approach, primarily that the shelf filter slopes are fixed on the Wiim EQ. Your subwoofer is also defacto "wireless", which some point to as potentially problematic, although the native Wiim synchronization works so well that I suspect this may not be an issue. The upside is that you don't need any wiring from your main setup to the sub location.