I don't have the off-axis response curves here. That said, these weren't designed to be listened to very far off-axis, either.
Thanks for the reminder of the earlier discussion - my recollector isn't always what it used to be...
That said, I do recall, now that I think about it, and re-reading the posts, there were some problems with room acoustics, which most folks acknowledged. There were also some problems with one of the recordings, but, if memory serves, I later found that to be in the recording, no matter what speakers I played through (even my Model 19's, Model 6's, and others I have at home).
Room acoustics at the Tulsa show were, indeed, a problem - hard surfaces, lots of reflections, etc., not suited for listening. Not even well suited as a living room, IMO...
Also, I do agree - I think there may be some who are, as you mention, hyper-sensitive listeners. For example, for many years when stores were using those ultra-sonic burglar alarms, I had to have them turn them off, or I couldn't go into the store - it killed my ears....just killed them. The people in the stores said they couldn't hear it, but admitted that a few of their customers did complain...
So, there are some for which nothing, other than a Shure VocalMaster Sound Column would sound good (terribly limited bandwidth)...as long as their amplifier had the special "Tone" knob like the VM amp did...
Given all that's been said, I still believe that if he will go back and do what I said in my most recent post, he would find a different result. It would be impossible for the 604 - in all it's variants - to be such a widely acclaimed speaker for so many years if there wasn't a good bit of "good" performance possible with them...
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