Help wanted in integrating sub using delay

[Jochie]

Hello everyone,

New member here. The listening part of my room is: 380cm (150inch) (front to back) cm x 350cm (138inch) (side to open floor plan, towards my back when pic was taken). Gear: pc>minidsp flex> svs pb2000 Lowpass 80Hz BW24/dB and Apollon ET7040>Dali Opticon 6 Highpass 80Hz BW24/dB.

After some help on ASR I tried to integrate my sub as well as possible. I applied these settings: mains 17.6ms delay, sub inverted, subgain -10 to taste, and it sounds really coherent. I just uploaded the measurements of both before (L+R, sub, L+R+sub) and after (L+R+sub with the settings applied). To my eyes, the graph with the delay and inverted sub looks a bit worse with a bigger dip at 55Hz and a slight dip around 100Hz? Could somebody be so kind as to fiddle with these measurements and for example the time alignment tool to see if this is the "best" result, or if there is room to improve?

 

[sm52]

Hello. I tried using measurements 1 and 2 to get a good total. Try delaying L+R by 8.26 ms, invert the sub (relative to measurement 2), and add +6 dB to it. I expanded the names of the measurements to make it clear what has changed in them. Addition of sub and L+R in the 8th measurement.
L+R drops off from 80 Hz. The sub seems to drop from 60 Hz (looking at graph 2). A hole from 55 Hz and above is most likely due to the room, but may be due to the subwoofer filter being too early.

 

[Jochie]

Hello. I tried using measurements 1 and 2 to get a good total. Try delaying L+R by 8.26 ms, invert the sub (relative to measurement 2), and add +6 dB to it. I expanded the names of the measurements to make it clear what has changed in them. Addition of sub and L+R in the 8th measurement.
L+R drops off from 80 Hz. The sub seems to drop from 60 Hz (looking at graph 2). A hole from 55 Hz and above is most likely due to the room, but may be due to the subwoofer filter being too early.

Ow wow, thank you so much. I applied the settings and listening now - sounds really good so far. Should I take a measurement of the applied settings and upload?

 

[sm52]

If you want more, take measurements separately for the right side (reference is also right), separately for the left (reference is right), separately for the sub (reference is right). After that, show (upload). To try to reduce the hole after 50 hertz, you can change the slope of the subwoofer filter. Now it is 18 dB/oct, frequency 50-60 hertz. Make 12 dB/oct at the same frequency. Or 24 dB/oct at 70-80 hertz. You can also reduce the cutoff frequency of the main ones, 70-60 hertz, the slope is the same as now, 14 dB/oct. I wrote real slopes, although you see others on the equipment.