1. WiiM Amp with PEQ but no delay settings
2. Walls are pretty thin to the right, but massive to the left.
View attachment 346448
Told you my room is complicated and challenging
3. I cant change the orientation, i can just set the couch and/or TV Board with speakers lower/higher and more left/right. (which both didnt change the response a lot)
Btw closing the door doesnt make a lot of difference. I also had the sub at the bottom right corner, but it felt a bit too close to the MLP with similar response.
Thanks!
First off, if you actually like your setup, then enjoy it and use some time to fiddle with the last details if there is something that truly annoys you.
If you still want to try different things, then read on. But as others pointed out, maybe you already have close to what you can achieve with the current setup.
Great drawing
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Just to try, you could put the subwoofer way in the left corner.... even though I know the signal wire would be quite long.
I can't make out the filter settings of your amp from the manual. It mentions a built-in EQ on both the input and output. Because what I do, is to do EQ on the mains, the subs, and then on the input, so that the final EQ after the mains and subwoofers work optimal together I then use the input EQ to make it a global EQ that is independent of the cross-over of both the mains and the subs, because some corrections are often needed right in the middle of a cross-over area.
In your case, with only one sub. I would measure the speakers alone in the MLP, within a half a meter around that too... to kinda get an average, so that it is just a bit smooth, even though you move your head a bit or slouch during listening... you know... sometimes we are tired
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In doing so, I would apply a low order high-pass filter to them, if your mains are not already falling with a second order slope downwards. This gives you a good starting point to mate the subwoofers with them, since you now know what to aim for.
Then you add the subwoofer, trying to fiddle both with placement and phase, cross-over ( the sub may easily cross higher than your mains do ), so that you end up with a response that have as few or very narrow suck-outs. And then you EQ ( on the input of the amp ) down the excess FR until the total response is smooth and even.
Sub frequencies are long and bounce quite a bit around the room before we "identify" them as bass. So that is one of the reasons you can't cross between mains and subwoofers like it was a cross-over between a midrange and tweeter.
Another approach, since you only have one sub, is to move the sub closer to the mains and treat it like an extension, kinda like having 3 way speakers. Then you can more easily use a bit more traditional approach with cross-over and EQ, since the system is now acting more like an all-in-one speaker - so to speak.
If you really want to make it better, and you find all approaches fruitless, then maybe the following story is the way to go - even though it might require extra fiddle.
I helped one of my friends who have a set of Focal Alto Utopia BE, where the bass was just wrong in his also very square room. A 4 channel DSP and rather cheap SVS and Klipsch subwoofer, one on the far rear left corner and one on the far right middle, cleared it all up with WAY smoother and controlled response all over the room. So maybe you need 2 cheaper subwoofers, rather than one "expensive". Maybe the built-in DSP is fine, or else a mini-dsp is quite cheap, especially for sub-use.
One of the reasons I love multiple subwoofers, is because even if I just EQ'd the mains, two people can't even enjoy the same level of quality bass, just sitting next to each other.
Please turn all nobs and push all buttons, and do not avoid overlapping the response between subs and mains. Your equipment won't break, and it's a huge learning experience that I would not personally have been without, since I also still learn, even though the people I've already helped are satisfied
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