I have saved the merger project, but If I post it - not much is seen. The whole project could be an option, but there may be harder to understand my "mess" than to make 4-8 different measurements.
Screenshots, probably near-wall and mid-room is the opposite, as I did not saved .vxp project for each version 🙁
Screenshots, probably near-wall and mid-room is the opposite, as I did not saved .vxp project for each version 🙁
thanks @svp
the responses of both woofer and port are very different for near-wall measurement. there is something odd going on.
the mid-room port output has a clear peak at 80 Hz, but only a very round bump at 150 Hz for the near-wall measurement.
This is definitely a measurement or speaker setup issue, nothing related to vituixcad.
Also there should usually be a slight valley at tuning frequency for the woofer nearfield measurement, unless you have a very low Q bass reflex tuning.
The mid-room measurement has a slight dip, but the resonator still seems to be quite lossy because of overdamping or air leaks.
I would think the" high tuning" and the very round highly lossy "peak" of your near wall measurement indicates there was a problem with air tigthness of your enclosure.
EDIT: are you sure you did not set the gating times too tight for the nearfield measurement at near-wall setup? that could also have a similar effect and the very smoothed appearence would indicate that too!
by the way I think the sentence in question in the vituixcad REW measurement manual
the responses of both woofer and port are very different for near-wall measurement. there is something odd going on.
the mid-room port output has a clear peak at 80 Hz, but only a very round bump at 150 Hz for the near-wall measurement.
This is definitely a measurement or speaker setup issue, nothing related to vituixcad.
Also there should usually be a slight valley at tuning frequency for the woofer nearfield measurement, unless you have a very low Q bass reflex tuning.
The mid-room measurement has a slight dip, but the resonator still seems to be quite lossy because of overdamping or air leaks.
I would think the" high tuning" and the very round highly lossy "peak" of your near wall measurement indicates there was a problem with air tigthness of your enclosure.
EDIT: are you sure you did not set the gating times too tight for the nearfield measurement at near-wall setup? that could also have a similar effect and the very smoothed appearence would indicate that too!
by the way I think the sentence in question in the vituixcad REW measurement manual
is probably not indicating you should always measure nearfield next to the wall, but rather IF you want to simulate a 2pi-situation for a speaker to be positioned near/in the wall, then put the woofer near a wall also for nearfield measurement.
If you want to check the correct functioning of your bass reflex tuning (including airtightness) you could do an impedance measurement.
The dip between the two peaks should be as low as possible (usually near the nominal driver impedance, lower impedance dip indicates high Q) and indicates the actual tuning frequency.
The dip between the two peaks should be as low as possible (usually near the nominal driver impedance, lower impedance dip indicates high Q) and indicates the actual tuning frequency.
Airtightness in my case is extremely bad, as this is still a prototype box, and exactly as you said: "The dip between the two peaks" is almost no dip at all. But this is not much the case, as I want to compare nearfield measurements of the same woofer + vent at 2 or more different conditions. Will see what is what after couple of days and actual measurements.
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If that is the case you don't get serious measurement results. Airtightness is essential for vented boxes, every small leak has massive influence on useful port output and tuning of the enclosure.
I learned this the hard way!
During my port experiments I found a quick and dirty solution for this problem: play a sine wave near the tuning of the enclosure and turn up the volume a bit. You can now listen for air leaks holding your ear near any potential gap or hole. You can probably hear very audible whistling sounds in case of air leaks.
Wet lips are also very sensitive to cooling effect of air leaks (bike tire repair trick!).
Once you found a leak simply seal it with play dough.
Good luck!