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Apr 8, 2010 at 10:47 PM Post #12,976 of 24,807
QUOTE=chi2;6539242]Sitting in an opera hall means hearing a large part of indirect sound waves reflected by the ceiling and the walls while the auditors' bodies have a strong absorbing and damping effect. High frequencies are reflected to a lesser degree than other frequency ranges which leads to a distinct tilt of the frequency reproduction. Depending on the sonic qualities of the building it does substantially matter, too, where you are sitting.

While this is just the way it is in concert and opera halls, I don't really like it
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. I prefer a fresher more involving representation like the one to be found on most recordings where you have a mix of more distantly placed microphones catching more of the indirect sound and of closer placed instrument or instrument group specific microphones recording a higher degree of direct sound. This, however, is more like sitting quite close to the orchestra or just at the rim of the orchestra pit (and I love it).

While the 007A/II is markedly brighter than the 007 I wouldn't call it bright or treble peaked. It certainly is less so than any pro bias Lambda with the exemption of the LNS (and maybe the 404LE which I don't own and haven't heard yet). The Sigmas provide a more concert or opera hall like presentation but with them I just miss some of the sonic experiences that make listening to music involving. My Sigmas with Lambda 202 drivers preserve more of the sonic information at both ends of the spectrum but I still prefer both O2s and the 4070 even for large orchestral works and operas.[/QUOTE]


Higher frequencies of sound suffer greater losses of amplitude in general, not just because of reflection effects. The physics seems fairly complicated even moisture in the air contributes to the attenuation of soundwaves. This source has a reasonable discussion on that subject.

The speed and attenuation of sound 2.4.1

The point being that in any real life listening situation you are probably going to hear less high frequencys than what will be recorded by a mic because this is generally set close in to the performers. So unless equalization is employed, recorded sound will be somewhat "hot." Headphones or speakers that give a flat response may end up sounding harsh or edgy as a result.

There is no single "concert hall sound" for even a single hall. The frequency response and the ratio of direct to indirect sound can vary a lot for different seating locations as well as the position of the performers.

At the Gotterdamerung performance I recently attended I sat in 2 different setas in different parts of the hall, because I misread my ticket and there was no usher when I first arrived. Both seats were pretty good, close to the front of their respective balconies but the lower "loge" seat gave a much stronger sound from the vocalists than did the sme seat number on the next higher balcony. This was probably due to the fact that I was sitting closer to their actual level on stage so they were more or less signing straight at me. However on that same loge balcony when I have sat further back, the sound is less clear.

However, I have been generally unhappy with the ground floor "orchestra" seats for opera in most halls because the orchestra sound is muted. This seeming paradox comes as a result of the fact that an opera orchestra generally sits in a pit so the orchestra seats get almost no direct sound of from the orchestra. Also if you sit under a balcony, you lose a lot of the indirect sound and I don't like these locations at all.

You will generally get both more direct orchestral sound in the balcony as well as a powerfull reflection from the ceiling so the balcony may be the best place to hear an opera orchestra if not the singers.

I listen to a lot more music on phones than in concert halls, for cost and practical reasons, and high frequency preformance has been a continuing source of annoyance to me over the years, especially with headphones.

I wouldn't say the 007A is bad in that regard. However the various Sigmas give both a more concert-hall treble roll-off in addition to their more natural perspective. That roll-off also acts as a filter to some of the nasties of recordings of high frequencies.

However, what I think I was hearing was more in the way of dissatisfaction with the treble artifacts in recorded sound. If you spend all your time listening to recorded music you build up a tolerance but after 5 1/2 hour live performance you develope more or an auditory memory of live sound.
That remains the basic test of recorded sound, does it sound like the real thing? I see very few members of this forum making any comparisons of live and recorded sound. I suspect few go to live performances, as is true with the rest of the population.

The state of the art of recorded sound and playback is very good but there are still issues which I doubt that even a megabuck system is going to solve.

I am more likely to listen to the 007A's for orchestral work but but I prefer the Sigma/404 more for opera and choral music. I am not sure how the Sigma/202 sounds compared to the Sigma/404. The trandsucers are simliar, but the 404 uses the higher grade cable the same as the 007. I suspect the Sigma/202 is closer in sound to the original Sigma pro. I have one, put together by Stax some years ago and it is slightly less refined in sound and has slightly less bass and treble than the Sigma/404.
 
Apr 9, 2010 at 10:18 AM Post #12,977 of 24,807
I had the chance to go to the Opera Bastille in Paris lastly for the first time, i was sitting well above the orchestra, and i was struck by the smoothness of the sound. I tend to think smoothness is the key quality i'm looking for when listening to any kind of music... i can't stand harshness either. I agree with you that treble is very soft in such conditions because of the physical effects both of you mentionned. After that i was curious to compare the live experience with my Lambda, not with the same recording though. I found that the Lambda's airy and delicate sound gave quite a hint of a live experience.
Of course you can't expect the exact same experience because you're always dependant on the microphones' placement, but i can imagine how the Sigma (which i never heard) would get you closer to the live experience thanks to the speaker-like presentation.
Warming up the amp helps too in my case. After an hour the sound gets warmer and fuller, and moreover this etch (i guess it's the infamous stats etch) i often hear (even with the SR-003) seems to disappear... leaving the headphone plugged into the amp doesn't solve the problem i think, and it's easy to check if you own two headphones. Sometimes i wish i could just plug them and enjoy the sound, but those phones seem to have their own mood
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Your comment about the LNS is interesting chi2, sometimes i think that with a bit more body in the lows the LNS would be quite O2-like!
 
Apr 9, 2010 at 12:27 PM Post #12,978 of 24,807
Hi, a while ago someone posted some frequency response curves of the Stax headphones. It was from a japanese site. Does anyone have the link? I'm looking for an SR-404 and SR-404LE frequency response curve measurements.

Thanks.
 
Apr 9, 2010 at 1:21 PM Post #12,980 of 24,807
Quote:

Originally Posted by Cya|\| /img/forum/go_quote.gif
I have a high end speaker system. Actually, the amp is not high end, but the speakers are. The speakers are custom made, with magnesium woofer and ribbon tweeter. Ribbon tweeters are very similiar sounding to electrostatic/planar technology.
I was thinking about buying the akg k701 and the zero dac in october, as i'm gonna transfer to a student dorm.
Since i may miss my speakers with ribbon tweeter, i was wondering if i could somehow afford some headphones amp.
So i wanted to ask: are the stax sr-303 different from the sr-404, or do they sound identically? 6moons says they are identical, but i'd like to ask for your opinion too.
Also, is it possible to drive them with a cheap class d amp, so i may buy a better amp in a later moment?



Does anyone know the answer to this question? Or his personal opinion is fine too ^^.
 
Apr 9, 2010 at 5:25 PM Post #12,981 of 24,807
Quote:

Originally Posted by ting.mike /img/forum/go_quote.gif
Hi, a while ago someone posted some frequency response curves of the Stax headphones. It was from a japanese site. Does anyone have the link? I'm looking for an SR-404 and SR-404LE frequency response curve measurements.

Thanks.



Probably this
ƒwƒbƒhƒzƒ“ STAX SRS-4040
ƒwƒbƒhƒzƒ“ STAX SRS-2020
ƒwƒbƒhƒzƒ“ STAX SR-007 SRM-717
Love the 3D graphs
tongue_smile.gif


By the way the bass is supposed to be flat, contrary to what these dummy heads tell.
 
Apr 9, 2010 at 10:12 PM Post #12,982 of 24,807
Quote:

Originally Posted by Cya|\| /img/forum/go_quote.gif
Does anyone know the answer to this question? Or his personal opinion is fine too ^^.


The main (only) difference between the 303 and 404 is the cable. Some have suggested that Stax also does more quality matching of the drivers on the 404. The 404 uses the bigger, lower capacitance, cable the same as the 007's.

I have never made the direct comparison of the 404 and 303 but I have had different Lambdas including the 404, a Signature and a Nova and Sigmas' with and without the wide cable and definietey prefer the phone with the wide cables as having somewhat more detail and refinement.

Unless cost is a big issue I would go for the 404. Whichever way you go look into removing the foam backing behind the drivers. I feel this makes all the lambdas sound more open and less harsh.
 
Apr 10, 2010 at 12:48 PM Post #12,983 of 24,807
Quote:

Originally Posted by Cya|\| /img/forum/go_quote.gif
So i wanted to ask: are the stax sr-303 different from the sr-404, or do they sound identically? 6moons says they are identical, but i'd like to ask for your opinion too.


I have both and I prefer the 404 – but only because of the look & feel of the 404's cable
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. With regard to their sonic characteristics I'm unable to hear any consistent differences.
 
Apr 10, 2010 at 1:01 PM Post #12,984 of 24,807
Quote:

Originally Posted by mobbaddict /img/forum/go_quote.gif
By the way the bass is supposed to be flat, contrary to what these dummy heads tell.


Frequency response curves are a most interesting phenomenon. With many headphone models I find my perceptions to more or less or even largely correspond with specific elements shown in the diagrams. With other models I'm just wondering. The bass response of the Lambdas and the O2 in these charts certainly belong to the latter. In my perception it is far from being rolled off below 40 or even 50 Hz. The actual measuring technique is crucial. Changing a detail may lead to quite different results. Seal will be the key to understanding low frequency reproduction. Still I fail to see why Lambdas and even more so the O2 should give (more) problems with seal when placed on a dummy head (than other phones).
 
Apr 10, 2010 at 1:29 PM Post #12,986 of 24,807
Quote:

Originally Posted by chi2 /img/forum/go_quote.gif
Frequency response curves are a most interesting phenomenon. With many headphone models I find my perceptions to more or less or even largely correspond with specific elements shown in the diagrams. With other models I'm just wondering. The bass response of the Lambdas and the O2 in these charts certainly belong to the latter. In my perception it is far from being rolled off below 40 or even 50 Hz. The actual measuring technique is crucial. Changing a detail may lead to quite different results. Seal will be the key to understanding low frequency reproduction. Still I fail to see why Lambdas and even more so the O2 should give (more) problems with seal when placed on a dummy head (than other phones).


Maybe the sculptured earpads don't sit properly except on real skin rather than whatever a dummy head is made of?
 
Apr 10, 2010 at 1:57 PM Post #12,987 of 24,807
Quote:

Originally Posted by chi2 /img/forum/go_quote.gif
Frequency response curves are a most interesting phenomenon. With many headphone models I find my perceptions to more or less or even largely correspond with specific elements shown in the diagrams. With other models I'm just wondering. The bass response of the Lambdas and the O2 in these charts certainly belong to the latter. In my perception it is far from being rolled off below 40 or even 50 Hz. The actual measuring technique is crucial. Changing a detail may lead to quite different results. Seal will be the key to understanding low frequency reproduction. Still I fail to see why Lambdas and even more so the O2 should give (more) problems with seal when placed on a dummy head (than other phones).


Take a look at pages 3 & 4 of this study, where they measure the Lambda Pro, it explains a lot of things
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http://www.jstage.jst.go.jp/article/ast/25/4/276/_pdf
Do you really think the Lambdas are on par with the O2 regarding deep bass? I felt the O2 was on another level when i auditioned it.
 
Apr 10, 2010 at 2:34 PM Post #12,988 of 24,807
Quote:

Originally Posted by mobbaddict /img/forum/go_quote.gif
Take a look at pages 3 & 4 of this study, where they measure the Lambda Pro, it explains a lot of things
wink.gif

http://www.jstage.jst.go.jp/article/ast/25/4/276/_pdf



Figure 18 is pretty handy too. Completely open the -3dB point is above 100Hz; completely sealed it drops to 30Hz.
 
Apr 10, 2010 at 6:14 PM Post #12,989 of 24,807
Quote:

Originally Posted by mobbaddict /img/forum/go_quote.gif
Take a look at pages 3 & 4 of this study, where they measure the Lambda Pro, it explains a lot of things
wink.gif

http://www.jstage.jst.go.jp/article/ast/25/4/276/_pdf



Excellent paper w/ great information, thanks! So the seal is not only crucial, as I knew & stated, but may also more difficult to realize with a Lambda on a dummy head than with other brands/form factors (which was somewhat of a surprise to me).

Quote:

Originally Posted by mobbaddict /img/forum/go_quote.gif
Do you really think the Lambdas are on par with the O2 regarding deep bass? I felt the O2 was on another level when i auditioned it.


Oh, I was only talking of bass quantity by frequency. The Lambdas can go down really deep. However, with regard to dynamics, impact, precision, and spacial localization the O2 certainly plays in different league.
 
Apr 11, 2010 at 3:11 AM Post #12,990 of 24,807
Quote:

Originally Posted by mobbaddict /img/forum/go_quote.gif
Take a look at pages 3 & 4 of this study, where they measure the Lambda Pro, it explains a lot of things
wink.gif

http://www.jstage.jst.go.jp/article/ast/25/4/276/_pdf
Do you really think the Lambdas are on par with the O2 regarding deep bass? I felt the O2 was on another level when i auditioned it.



Doesn't surprise me. I thought that the 007A had less deep bass than the 404 when I first got mine. Later this was not so either because of break-in or the fact that I did Spritzer's spring mod on the 007A. When I compared my 007A with the 007 Mk1 at Cajam, I thought both had about the same bass extension although the 007A had some bass boom.

Quote:

Originally Posted by chi2 /img/forum/go_quote.gif
Excellent paper w/ great information, thanks! So the seal is not only crucial, as I knew & stated, but may also more difficult to realize with a Lambda on a dummy head than with other brands/form factors (which was somewhat of a surprise to me).

Oh, I was only talking of bass quantity by frequency. The Lambdas can go down really deep. However, with regard to dynamics, impact, precision, and spacial localization the O2 certainly plays in different league.



The Lambda earpad is contoured to fit most peoples' heads, not a flat coupler. This obviously helps its good bass response, even vis a vis the 007.
 
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