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Paul S. Barton comes to mind for living designers.
Earl Geddes, Tom Danley, and Don Keele are surely also widely known among enthusiasts.
Paul S. Barton comes to mind for living designers.
When I tried to record it, I realized it is not the breathing that is causing the problem but the letter "H" when she utters "he goes away." The H picks up a metallic overtone. I have enclosed a crappy recording on my Samsung phone. I can hear it there but it is far more subtle than what I hear in person.
It is hard to hear it in that recording if you don't know what the read distortion sounds like. I will see if I can set up my recording mic to capture it better.@amirm, have listened to your recording many times and can't find anything noticeable when Eva sings "he".
From THD graph there's evident problems in two resonance peaks starting at 585 Hz 4% next some 620 Hz 3%, these are not visible in FR and there's a small change in impedance, they appear in the port distortion too. Eva Cassidy voice triggered both resonance points to build up 2nd an 3rd harmonics...in the most sensitive frequency range for detecting distortion.Can you explain more? I don't know what I'm looking at, or where the problem is.
What makes you think it is not just a bad sample?
Hint: see BS U5 review https://www.audiosciencereview.com/...s-u5-slim-3-way-coaxial-speaker-review.13735/What makes you think it is not just a bad sample?
Except that perspective and presence are nonsense words.Listening to one speaker will certainly allow one to hear many characteristics of a speaker, such as tonal balance. It seems to me that perspective, or presence of the speaker is more easily heard in a stereo performance .
BTW, this is the actual album:
View attachment 104904
The youtube version I linked to is from another album. While it showed the problem, it was not as severe there so maybe there is a difference in recording (or youtube compression changing it).
Great a expert like you @jackocleebrown is part of ASR community. if I may, what do you think about coaxial mid-tweeter speaker on axis response vs 20-30 degree off axis?Amir, it seems likely to me that this issue is caused by something having come loose in the speaker. Possibly a trim, one of the driver bolts, a cable internally rattling. I'm doubtful this is a design flaw.
The term perspective describes the apparent distance between the listener and the music. Perspective is largely a function of the recording (particularly the distance between the performers and the microphones), but is also affected by components in the playback system. Some products push the presentation forward, toward the listener; others sound more distant, or laid-back. The forward product presents the music in front of the loudspeakers; the laid-back product makes the music appear slightly behind the loudspeakers. Put another way, the forward product sounds as though the musicians have taken a few steps toward you; the laid-back product gives the impression that the musicians have taken a few steps back. Robert HarleyExcept that perspective and presence are nonsense words.
That reads like a chaotic behaviour (bifurcation) which has been observed on loudspeakers:Almost at the same time I hear the problem, the woofer goes way in and stays there for a second.
Is the speaker new or is it done - "burn in"?
Amir, it seems likely to me that this issue is caused by something having come loose in the speaker. Possibly a trim, one of the driver bolts, a cable internally rattling. I'm doubtful this is a design flaw.
@amirm do you remember that strange amp protection issue you had a while ago when testing a speaker? Could it be that the amplifier is causing this due to protection engaging briefly this time? Maybe you can monitor the speaker input terminals to see if there’s an anomaly that tally with the sound you hear?Mark Levinson No 53:
The track has DC component at the start of "goes away" !I put a blanket over the coaxial driver and I still could hear the problem. I then pulled it further down on top of the woofer and still could hear the problem.
Almost at the same time I hear the problem, the woofer goes way in and stays there for a second. The coaxial driver is also moving fair bit. Not sure if these are helpful hints but this is all I have.
I do. Unfortunately as the weather has gotten colder, the problem has gotten worse. So for now, I have stopped using that monoblock and this test and recent other ones have been with the other monoblock.@amirm do you remember that strange amp protection issue you had a while ago when testing a speaker? Could it be that the amplifier is causing this due to protection engaging briefly this time? Maybe you can monitor the speaker input terminals to see if there’s an anomaly that tally with the sound you hear?
What’s the point on insisting? You made your point. It’s rejected. We don’t need to hear your constant whining.Ridiculous. That’s almost like publishing half a review. Very disappointing, Amir.
Yeh, could have been caused by me starting the track in the middle.The track has DC component at the start of "goes away" !
Thank you for the reply. I was thinking if something in this speakers impedance function that is fooling the amplifiers protection circuit. That’s all.I do. Unfortunately as the weather has gotten colder, the problem has gotten worse. So for now, I have stopped using that monoblock and this test and recent other ones have been with the other monoblock.
So no, it is not related to that. Indeed as I reported -- and I have repeated -- I have played the exact track at levels matching or exceeding what this speaker is doing with Revel M105 and there is zero hint of this problem there.