Voici le dernier buzz du monde tellement passionnant de la hi-fi
Il s'agirait d'une enceinte avec l'une des meilleurs image stéréophonique.
Quelques specs :
-une courbe de réponse en fréquence plate sur toute la bande audible à +- 0.7dB dans et hors axe d'écoute.
-Une différence de phase proche de zéro entre les HP medium/aigu proche de Zero à toutes les fréquences
Pour en savoir plus le site du constructeur :
http://www.yg-acoustics.com/
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Toutes les enceintes HiFi
Yg acoustics l'enceinte : le buzz
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ici les commentaires sur le blog d'un magasin américain (fan de kharma, audionote et ce genre de son particulier) :
http://www.yg-acoustics.com/YG_Acoustic ... ochure.pdf
The claim to fame for these speakers is their reported accuracy in frequency response: +/- 0.7dB. Sure sounded accurate to me.
Listening was an interesting experience here. The flat frequency response allowed part of my brain to relax while listening, a part which does not usually get to relax. Yes, our Marten Design Coltranes are a reported +/- 2dB - but there was an apparent audible improvement heard here. The musical passages of the Rachmaninov flowed better from one to the other, each being of a more appropriate, more real, loudness with respect to what came before and after. This is the good news - and the advantages of a really flat frequency response is something I think we will both attribute more importance to whenever we audition a loudspeaker in the future.
A cautionary note: specifications usually, including those for this speaker, list a frequency response without detailing at what SPL the response was measured at. As an obvious example of how misleading this is, the response may be flat to 20Hz at 1 watt, but at 10 watts it may be down 8dB at 20Hz. Another specification qualification that is missing is what kind of frequency wave was used - was it a pulse or a smooth sweep?
What is missing in these specifications is also a consistency of frequency response dynamics - which has at least three dimensions:
1. Consistency: For say, one watt, does the shape of the response to a pulse at, say, 30Hz match the shape of the response to one at say 5000Hz.
2. Accuracy: how closely does the shape of the response to a pulse match the shape of the response itself
3. Dynamics: How consistent are #1 and #2 at different wattages? [We talk about this in general terms as how well a speaker handles micro-dynamics, midi-dynamics, and macro-dynamics]
The construction of these speakers out of what looks to be aluminum also seemed to minimize cabinet colorations. Most high-end loudspeaker manufacturers are getting pretty good at this these days.
OK, the bad news. There was a real lack of separation between the notes here. They all kind of blended into each other. No doubt part of the cause of this is the low efficiency of the midrange / tweeter assembly (a reported 85dB). This assembly is the box at the top of the speaker. It is being bi-amped by a 800 watts/channel stereo amplifier.
The subwoofer, the largest part of the speaker, is self-powered. There was some disconnect between the bass and the midrange. There was also a severe lack of transparency and imaging - there was no way either if us were able to convince ourselves that there was a real piano between the speakers somewhere.
My guess would be that in constructing the crossover so that the flat frequency response was achievable, they not only reduced the efficiency of the speaker quite a bit, but comprised some of the other aspects of frequency response, as described by the 3 points above.
Anyway, a mixed bag. These speakers are very popular in Japan.
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L'adresse du blog : (et des photos suplémentaires)
http://www.audiofederation.com/hifiing/ ... /index.htm
http://www.yg-acoustics.com/YG_Acoustic ... ochure.pdf
The claim to fame for these speakers is their reported accuracy in frequency response: +/- 0.7dB. Sure sounded accurate to me.
Listening was an interesting experience here. The flat frequency response allowed part of my brain to relax while listening, a part which does not usually get to relax. Yes, our Marten Design Coltranes are a reported +/- 2dB - but there was an apparent audible improvement heard here. The musical passages of the Rachmaninov flowed better from one to the other, each being of a more appropriate, more real, loudness with respect to what came before and after. This is the good news - and the advantages of a really flat frequency response is something I think we will both attribute more importance to whenever we audition a loudspeaker in the future.
A cautionary note: specifications usually, including those for this speaker, list a frequency response without detailing at what SPL the response was measured at. As an obvious example of how misleading this is, the response may be flat to 20Hz at 1 watt, but at 10 watts it may be down 8dB at 20Hz. Another specification qualification that is missing is what kind of frequency wave was used - was it a pulse or a smooth sweep?
What is missing in these specifications is also a consistency of frequency response dynamics - which has at least three dimensions:
1. Consistency: For say, one watt, does the shape of the response to a pulse at, say, 30Hz match the shape of the response to one at say 5000Hz.
2. Accuracy: how closely does the shape of the response to a pulse match the shape of the response itself
3. Dynamics: How consistent are #1 and #2 at different wattages? [We talk about this in general terms as how well a speaker handles micro-dynamics, midi-dynamics, and macro-dynamics]
The construction of these speakers out of what looks to be aluminum also seemed to minimize cabinet colorations. Most high-end loudspeaker manufacturers are getting pretty good at this these days.
OK, the bad news. There was a real lack of separation between the notes here. They all kind of blended into each other. No doubt part of the cause of this is the low efficiency of the midrange / tweeter assembly (a reported 85dB). This assembly is the box at the top of the speaker. It is being bi-amped by a 800 watts/channel stereo amplifier.
The subwoofer, the largest part of the speaker, is self-powered. There was some disconnect between the bass and the midrange. There was also a severe lack of transparency and imaging - there was no way either if us were able to convince ourselves that there was a real piano between the speakers somewhere.
My guess would be that in constructing the crossover so that the flat frequency response was achievable, they not only reduced the efficiency of the speaker quite a bit, but comprised some of the other aspects of frequency response, as described by the 3 points above.
Anyway, a mixed bag. These speakers are very popular in Japan.
---------------------
L'adresse du blog : (et des photos suplémentaires)
http://www.audiofederation.com/hifiing/ ... /index.htm
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- Inscription Forum: 19 Jan 2007 21:20
My guess would be that in constructing the crossover so that the flat frequency response was achievable, they not only reduced the efficiency of the speaker quite a bit, but comprised some of the other aspects of frequency response, as described by the 3 points above.
Je serais assez d'accord avec ca...
Outre qu'une enceinte avec une courbe de réponse plate ne sert à rien vu que l'acoustique de la piéce peut ajouter 20 dB à certaines fréquences ( dans les cas désespérés quand même ), il est très probable que le filtrage pour arriver à cette "platitude" commence à faire du dégat sur le signal...
L'exemple type de la fausse bonne idée
La configuration dans mon profil
Adhérez à l'assoc pour que le site soit indépendant : http://www.homecinema-fr.com/l-association-hcfr/
(Ce compte ne répondra pas à vos messages privés)
- ogobert
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ogobert a écrit:My guess would be that in constructing the crossover so that the flat frequency response was achievable, they not only reduced the efficiency of the speaker quite a bit, but comprised some of the other aspects of frequency response, as described by the 3 points above.
Je serais assez d'accord avec ca...
Outre qu'une enceinte avec une courbe de réponse plate ne sert à rien vu que l'acoustique de la piéce peut ajouter 20 dB à certaines fréquences ( dans les cas désespérés quand même ), il est très probable que le filtrage pour arriver à cette "platitude" commence à faire du dégat sur le signal...
L'exemple type de la fausse bonne idée
Non, c'est juste le dernier pipeau marketing à la mode. Les enceintes se raffinent mais ce sont tjs les mêmes bonnes vieilles recettes dans des emballages différents. Ce genre de marketing est là pour les faire exister sur un marché surchargé.
- jbcortes
- Messages: 873
- Inscription Forum: 09 Déc 2002 14:21
Il faut bien trouver un argument pour essayer de se faire connaitre quand on propose un nouveau produit,
bon ou pas bon, vieille recette ou pas,
il y a de grands "historiques" qui feraient bien de se remettre aussi en question quelquefois...
et qui mettent des fortunes dans le marketing...
Celles-la méritent qu'on les écoute avant de les mettre au placard d'un revers de main non ?
bon ou pas bon, vieille recette ou pas,
il y a de grands "historiques" qui feraient bien de se remettre aussi en question quelquefois...
et qui mettent des fortunes dans le marketing...
Celles-la méritent qu'on les écoute avant de les mettre au placard d'un revers de main non ?
- van.alstine
- Messages: 7423
- Inscription Forum: 01 Nov 2006 19:13
- Localisation: france
van.alstine a écrit:Il faut bien trouver un argument pour essayer de se faire connaitre quand on propose un nouveau produit,
bon ou pas bon, vieille recette ou pas,
il y a de grands "historiques" qui feraient bien de se remettre aussi en question quelquefois...
et qui mettent des fortunes dans le marketing...
Celles-la méritent qu'on les écoute avant de les mettre au placard d'un revers de main non ?
Oui, c'est sûr. Elles sont peut-être très bien. Avant tout, je vois qu'elles sont chères. De plus en plus. Et ça m'énerve.
Au fait, je suis d'accord avec toi sur B&W.
- jbcortes
- Messages: 873
- Inscription Forum: 09 Déc 2002 14:21
Oui, pour ce qui est du prix c'est très agaçant de voir que ça devient aussi un argument
Mais par grands historiques je ne visais pas que B&W bon en grande partie c'est vrai...
on peut y mettre du monde là dedans...
Mais par grands historiques je ne visais pas que B&W bon en grande partie c'est vrai...
on peut y mettre du monde là dedans...
- van.alstine
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- Inscription Forum: 01 Nov 2006 19:13
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Composants utilisés :
Hypex electronics subwoofer amps
Kimber select cables
Mundorf crossover
Scan-Speak/Vifa drive units
WBT connectique
Hypex electronics subwoofer amps
Kimber select cables
Mundorf crossover
Scan-Speak/Vifa drive units
WBT connectique
- reyle
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- Inscription Forum: 23 Déc 2006 17:44
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- reyle
- Messages: 4030
- Inscription Forum: 23 Déc 2006 17:44
Le Yoav a l'air très branché avec DCS.
- reyle
- Messages: 4030
- Inscription Forum: 23 Déc 2006 17:44
reyle a écrit:
le concepteur Yoav Geva Gonczarowski
Le tweeter est pas un peu trop haut?
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- Inscription Forum: 19 Jan 2007 21:20
reyle a écrit:le navire amiral
On dirait les nouveaux drones anti-émeutes de Tsahal
- van.alstine
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