ernestcarl
Major Contributor
Sorry, I did not look carefully! Duh. It's already included in the mdat. Thanks!
It is problematic using LP measurements from 2 different rooms to compare those, better would be nearfield measurements at the same exact position and room, even better in a large anechoic room, also comparing a step response of 3-way and 2-way loudspeaker and even more making optical analogies to "fast drivers" but we have discussed this in another place before.*The Sceptre tweeter+mid woofer step looks 'quicker' than the KH310 minus the phase uncorrected sealed sub -- dunno how this will translate with actual listening. Some people criticize 'overly fast' drivers...
It is problematic using LP measurements from 2 different rooms to compare those, better would be nearfield measurements at the same exact position and room, even better in a large anechoic room, also comparing a step response of 3-way and 2-way loudspeaker and even more making optical analogies to "fast drivers" but we have discussed this in another place before.
@ernestcarl
Thank you for working with my measurements! I don't understand exactly what it all means, but I'm happy to see it looking good!
Just to be on the safe side and for clarification, I'll explain again what I did:
Corrected system:
measurements are called "L+sub network" and "R+sub network": RME ADI-2 DAC -> KH750 DSP network mode (filters set by MA 1) -> KH310
Additional measurements:
"L local", "R local": RME ADI-2 DAC -> KH310 (no sub, no filtering)
"sub network": RME ADI-2 DAC -> KH750 DSP network mode (filters set by MA 1) -> 1 KH310 for acoustical timing reference, the other one switched off, so the measurements shows sub only
"sub local": RME ADI-2 DAC -> KH750 DSP local mode (no filtering) -> 1 KH310 for acoustical timing reference, the other one switched off, so the measurements shows sub only
"L+sub local", "R+sub local": RME ADI-2 DAC -> KH750 DSP local mode (no filtering; delay and phase not optimized) -> KH310
Edit: UMIK-1 untouched at same position the whole time.
Does the software show the total time delay for sub+speaker phase linearization? I'm interested in how much delay it adds for viewing streamed web video content.
No, i don´t think so. I don´t know how much delay is added. From my experience with trying different delays manually in this room to try aligning the sub and speakers i would guess something between 10 and 20ms, but i really don´t know.
Edit: By the way, physical distance LP to sub is quite close to LP to mains, less than 10cm difference, i think.
Maybe also not to increase the latency too much?There is something quite curious about the correction in the Neumann sub+mains phase-linear system in that it does not try re-create a more "perfect" looking step between the sub & mains like we see in others e.g. Audiolense & Dirac. I dunno if this is just a one-off thing where its AI decided not to do it in this particular situation for "best results".
Maybe also not to increase the latency too much?
I don´t know what you mean with curious, but it should be noted that L and R are quite different in the crossover region (FR and phase). So maybe aligning to both channels had to be a compromise.
I think with the ported KH120 will still be slower even after time-domain correction.
I think I see clearer why the phase-linearized step of the S8 looks "quicker" than that of the KH310 -- it could just be an illusion.
Extreme windowing:
View attachment 105788
*much more evident with the extreme nearfield measurement I took at 15cm.
The high resolution wavelet is a much better default view of the energy peak time response performance between different speakers.
View attachment 105791
In the mids and highs where linear phase correction is more relevant, the result probably would be the very similar after all.
@DjBonoBobo
Whenever you can find the time, I was wondering if you can take a quick listen to the track Foc by Rodrigo y Gabriela with your KH310's phase-linearization turned on vs off. The bass is unimportant. I'm just interested if you can perceive any "brightening" colouration effect in the mid and high transients from the guitars or any kind of improved clarity.
Maybe you won't be able to hear any difference at all, which would be very informative, nevertheless.
Unfortunately i am not able to do this because in my current setup i cannot turn linear phase on/off without touching the EQ for the frequency response. This would only be possible if i would reset the EQ filters and reactivate the iPad-app, but i will not do this, because i would have to make all the measurements again. (Also it would require to go to the subwoofer and press the switch for "local", so no "on the fly" comparison possible, i think)
EDIT: Download link: https://www.file-upload.net/download-14439092/KH310A-KH750DSPMA-1_TEST.mdat.html
EDIT2: Room dimensions: 489x357x240 cm (LxWxH)