Pues sí valhuma .....fíjate hasta qué punto puede ser divertida la sugestión:valhuma escribió:También puede suceder que no nos guste que las cosas sean tan sencillas,cuando en este mundo hemos buscado complicar las cosas.
Es como decir que si es sencillo y fácil no puede ser mejor que una cosa muy trabajada y laboriosa con mejores materiales, como siempre esta saliendo la parte comercial que tenemos metidos por culpa de querer sacar cosas nuevas y que superan a las viejas, por lo menos eso dicen, así poder vender lo nuevo por los motivos que nos están diciendo.
Algo tienen que decir para poder argumentar en lo nuevo, no se puede decir, miren hasta aquí hemos llegado, esto ya esta bien, ahora solo podemos hacer cosas mas bonitas, diferente diseño, oírse se va a oír igual que lo anterior, pero sera mas nuevo, mas elegante, eso no vende.
UN SALUDO.
"
An interview with Floyd E. Toole,
Harman International
Pregunta:
2. Loudspeakers cannot show such a good frequency response, distortion figures or step response as amplifiers, do you believe they will ever come close? And will it be possible to make loudspeaker boxes without a boxy sound? What quality is most in need of improvement?
Respuesta:
-There are two fundamental properties of a loudspeaker - frequency domain behavior (amplitude and phase response - both of which define the time domain response) and directivity. With the excellent transducers that we can now make (e.g. the new Infinity C.M.M.D. ceramic metal matrix diaphragms that have no diphragm resonances within the audible band) and digital equalization, it is possible to make loudspeakers that are remarkably close to the ideal performance.
-Directivity is more complicated, being influenced by the shape and size of the enclosures, and the number and sizes of drivers. But, even there, things are now getting very much better than in the past.
-Time-domain behavior (you call it step response), is not a serious factor, as humans are very insensitive to phase shift. Only very large group delays - larger than occur in normal loudspeaker designs - are audible, and even then normal listening room acoustics make the differences even more difficult to hear.
- Right now, some loudspeaker designs come close enough to the ideal that the opinions of listeners are more influenced by the variations in recordings and listening rooms. Those are the factors most in need of improvement.
- Many recording studios use monitor loudspeakers that are seriously bad, and all rooms control the bass response that we hear. All rooms are different.
-The boxy sound of an enclosure is caused by acoustical and mechanical resonances. Good engineering can reduce these to inaudible levels. I remember, in a blind test of several years ago, listeners complaining of a "boxy" coloration from a certain product. It was audible to me as well, and moderately annoying. When the curtain was opened, the listeners saw that the boxy sound was coming from a large full-range panel loudspeaker.The resonance was in the panel - there was no box. It turns out to be difficult to design panel loudspeakers that do not have resonances. There is no "magic" about panel speakers, and there is no need for a box to sound boxy.
1. Loudspeaker Measurements and Their Relationship to Listener Preferences”, J. Audio Eng, Soc., vol. 34, pt.1 pp.227-235 (1986 April), pt. 2, pp. 323-348 (1986 May).
2. F.E. Toole and S.E. Olive, “The Modification of Timbre by Resonances: Perception and Measurement”, J. Audio Eng, Soc., vol. 36, pp. 122-142 (1988 March). "
.......sobretodo cuando estás plenamente convencido de que a una caja le resuena el recinto.......se abre el telón tras el blind test y ...... tachán .....resulta que esa caja que percibíamos como que tenía "boxy sound" (porque se escuchaba cierta resonancia) en realidad no tenía recinto cerrado!!! y la resonancia estaba provocada por el propio panel
Qué cachondo que es Floyd Toole, eh!
Un saludete
P.D.: A veces creemos percibir con toda seguridad una anomalía debida a un factor determinado que en realidad es producida por un fenómeno diferente.
P.D.2: Earl Geddes, ingeniero y HUMita que "no debe tene NPI" diseña el recinto de sus cajas referencia que tanto éxito le están dando así de cutres:
http://www.audiocircle.com/index.php?topic=54981.0
Aquí sus modelo inferior Abbey 12:
http://www.enjoythemusic.com/diy/0309/gedlee_abbey.htm