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Help with measurement Results - Understanding Wavelets, RT60 Target in Listening Rooms, Impuls Response Targets, General Advise

Plompudu

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Jun 13, 2023
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I've got a GIK 244 Bass Trap for Christmas and took the time do do some measurements and would love some feedback and suggestions.

I'm using 2x Swissonic A306 connected and crossed over at 80Hz via a SVS SB-1000.
My Dac and DSP is a Qudelix 5k. (The Speakers also have a build in ADAU1701 DSP that I haven't yet touched)

My comment has a lot of pictures and short text snippets so I tried to mark all import info and questions as bold.




First a RTA measurement of both speakers playing (64k, 1/48, No Smoothing, 50x Avg., Hann, 93.75%).
In pink and blue you can see the EQ and on Axis response (taken from Erins Spinorama)
1735225303814.png


Here are L/R RTA:
1735225346186.png

The Dip at 80Hz in the Left channel is caused by a Crossover issue that I can't fix till I get another DSP with separate Channels for Speaker and Subwoofer :/
They said on the Forum for my current DAC that they might get this feature implemented via the balanced out to 3 separate Channels.

Is such a big difference in the Treble normal for a small, asymmetrical room?
I've tried EQing it but the all results changed the imaging and tonality too much.
I'm at ~1.5m Distance - is it fair to assume that the flat Direct sound dominates the perception so much that it doesn't matter?

Picture of my Setup (behind the seat on the wardrobe is the new Absorber) + Rough Room Layout :
1735235333086.png

1735235397022.png


Here are 2 repeated single point measurements of both channels playing, with me outside of the room to minimize variance - The Phase seems to have changed a lot in the treble, is this normal?
1735225629082.png

1735225659173.png


Is the Phase good looking and are there some realistic Targets and how to get there?
Is FIR filtering useful if I have such a seemingly high variance in the Phase?
Any good links talking about Phase would be appreciated!


Here is the Impuls Response before and after adding the Panel:
The Old measurement is at a slightly different mic position and without a PEQ at 380Hz on the R Channel.
The Level changed by 2dB between the measurements by accident.
1735229516500.png

1735230262188.png

1735230314333.png

The Peak at ~0.5ms is likely caused by the mic stand I used since at the exact distance that would cause this peak in the impulse response. (2x11cm)

What are your Thoughts on the Impuls Response?
How does your System measure for comparison?
Is the downwards peak and waviness in the beginning a potential issue worth fixing? Could it be caused by the build in DSP in my Speakers?


Here is the FR of both measurements in case it's needed:
1735229740551.png


Here is the RT60 (Red = Before):
1735233274241.png

I plan to buy another Subwoofer when I've got the Money for it and a MiniDSP 2x4 for a proper Multi Sub with good integration. Do you expect it to potentially fix the Big Standing Wave at 36Hz?

Are these Targets what you'd recommend as well for a residential Setup or are they more meant to be used in a Studio?
1735233636295.png

Here are the Values with a Room of my Size:
1735233658448.png

1735233875821.png

Is the increase at around 200Hz something I should try to fix or would you say that's fine?

Here is the Fourier Spectrogram:
1735229205492.png

Anything worth pointing out?

Here is the Wavelet - can someone please explain what I'm looking at since I haven't found any explanations online that help me understand:

1735228880783.png

1735228904223.png

1735228929768.png

Are the Results good - anything I can conclude cause of it?
Need to fix anything?

Tell me if you need any other measurements and I'll send them if possible :)

Thanks in Advance to anyone answering!
 

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I've just found this and it seems to support my feeling of the imaging a tad bit getting better and something missing from behind me, but not in a bad sense.
The Overall soundstage seems better as well.
1736283830718.png


Here is the audibility threshold of the reflections based the picture above with the Bass Absorber behind me at place.
With me inside the Room, near the mic do they change upwards and have a higher run to run variation.
In some parts are the Early Reflections a bit above the Threshold, but don't quite reach the B-Line.
1736283792843.png

Here is the before and after:
1736285548323.png


Based on that would I say that the above Impulse Response Target is a good guideline, while I prefer being more towards the inaudible Reflections instead of in the "Spaciousness"-Area.
 
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