Stereophile has been doing and publishing these measures for years so I would not discount them totally.
peter you should talk to JS then to figure out what is going on. Or maybe someone else here with expertise in this area could comment.
Obviously your results apply to your speakers only. But there is nothing to indicate they apply to any other pair so you should be cautious in public there.
I personally suspect you have a crossover issue at this point but I am no expert. JS could help you much better.
I am an engineer and have image processing background but not an audio engineer. 1/3 octave as I understand it is essentially a low pass filter that produces a more generalized output. That would be useful to enable a general comparison between data sets filtering details that matter for exact tonality but not for that initial purpose.
In any case you need apples and apples measures to compare at all. 1/3 octave apples apples comparison is only one possible with data and tools available at this point that is apples/apples. It would show general response with enough resolution to determine if two general response curves are similar or not. From what we know so far I would predict they continue to be radically different with yours still showing large gradual dropoff all else staying the same.
The review mentioned a small tonality variation detected. It was not clear to me if that was detected by ear only or supported by other measures done but not mentioned. John Atkinson surely has/had good ears but I I would still hope the latter.
Also these were original OHM 5s reviewed. I had original Walsh 2s, same gen Walsh drivers and I a/b compared them to my newer series 3 models when I got them and I can attest that there were significant midrange tonal variations and the originals were nowhere close. Stereophile may have been generous with their assessment and not published unflattering info perhaps knowing JS would attempt to address which he did starting in series 2 models shortly after.
peter you should talk to JS then to figure out what is going on. Or maybe someone else here with expertise in this area could comment.
Obviously your results apply to your speakers only. But there is nothing to indicate they apply to any other pair so you should be cautious in public there.
I personally suspect you have a crossover issue at this point but I am no expert. JS could help you much better.
I am an engineer and have image processing background but not an audio engineer. 1/3 octave as I understand it is essentially a low pass filter that produces a more generalized output. That would be useful to enable a general comparison between data sets filtering details that matter for exact tonality but not for that initial purpose.
In any case you need apples and apples measures to compare at all. 1/3 octave apples apples comparison is only one possible with data and tools available at this point that is apples/apples. It would show general response with enough resolution to determine if two general response curves are similar or not. From what we know so far I would predict they continue to be radically different with yours still showing large gradual dropoff all else staying the same.
The review mentioned a small tonality variation detected. It was not clear to me if that was detected by ear only or supported by other measures done but not mentioned. John Atkinson surely has/had good ears but I I would still hope the latter.
Also these were original OHM 5s reviewed. I had original Walsh 2s, same gen Walsh drivers and I a/b compared them to my newer series 3 models when I got them and I can attest that there were significant midrange tonal variations and the originals were nowhere close. Stereophile may have been generous with their assessment and not published unflattering info perhaps knowing JS would attempt to address which he did starting in series 2 models shortly after.