Originally Posted by l0nestar8
Airplayed to my X14's was interesting:
1) I had audible rumble starting at ~38Hz but very low in level. I couldn't start to detect pitch changes until about 50-60Hz.
2) Things were very "up and down" from there all the way up to ~350Hz with a big hole between 80Hz and 100Hz, but very strong on either side.
3) Output from ~500Hz and above was pretty even but still lots of image shifting that only increased until about 5kHz where everything sounded like it was inside my head.
4) I found 7-8kHz to be highly annoying and fatiguing. I physically cringed in this range.
5) After about 10-11kHz, I could no longer hear pitch changes and the sound was purely inside my brain (between the ears).
6) No audible sound past 13.5kHz.
7) Same test on my Oppo PM3 headphones (didn't even bother with HD650's) had an audible range from low 20's to 17kHz. No sound at all (likely my own hearing at this point) above ~17.5kHz.
8) I would likely need to try my Shure or Westone IEMs to get a true hearing limit. I don't think speakers or full-size headphones are best for that.
There are LOTS of interesting things happening with that sweep, which I am positive will vary for everyone.
One thing that stood out to me, is this is not a recording......it contains no mics, no instruments, no singers etc.
Yet it displays many of the attributes of imaging and soundstage that get linked to attributes of a recording or a speaker...…...yet none of that explanation exists......
There was no sounstage or imaging, no mic work, nothing to capture properly , no information whatsoever that would result in the image going from floor to ceiling in front and behind or even inside the head......
Due to the slow speed of this it really stands out...…
I have listened to it many times and still get new observations I did not notice in listening to it before...…..
While I do not understand all the science behind it, it does confirm to me it is very complex stuff and some of what is attributed to a speaker or recording is not the speaker or recording at all.
It is interesting to think of how much of the image might not be the recording or the speaker when I hear location shifts like that.....which brings me back to my little minute piece of the puzzle which I have been fixated on...."The Room"....."The Room"....LOL
Its is not the only one and might not be largest one, but I am fairly certain nothing will sound proper or good in a Racquetball court. No matter what...….
I know in live presentations the venue location is everything to some...…….the best orchestra or singer draws few people in certain locations due to the effect that location has on sound and some locations always draw people because of the way that location sounds.
Here is a quick best sounding concert halls search.....no matter the source, several always rate at the top...…...many agree we still do not know exactly why these sound the best.....but it is all about the room or hall in this case. From the frequency sweep video you can see the room certainly has attributes that are inescapable and contribute to many aspects of what is heard.
I can`t help but believe this accounts for some of what people hear in a speaker, that maybe is not heard in another speaker that has nothing to do with the speaker at all, but the room.
This is one take on why...…… The hall radius is the distance out in the hall where the power of the direct sound is equal to the power of the reflected sound.
I know in my room, I took over 100 REW sweeps moving the sub in a 6 inch grid pattern thru the entire usable room......a couple inches and also a couple DB had a very measurable difference based on the location and room...…….I did not investigate how minute of change was measurable, but I can easily see where listening to a speaker in room side by side could be enough to make a huge difference in what was heard in imaging, factor in non standardized sensitivity ratings and a simple side by side in room test of 2 speakers with the same avr level could produce crazy differences.
Which not only is the room the room, it depends and its complicated come in to play again.
Level matched blind tests which place the speaker in the same location in mono are about the only way to reduce the its complicated to a manageable level.
I have been nose to the grindstone for 2 years now and all I know is the rabbit hole is DEEP and I am barely educated enough to even understand part of what I hear and a small portion of why.
Much less shed my biases and preconceived notions which is even harder.