Jaja, todos entran a justificarse... Heimi pide la ayuda de Congo y Congo a la ayuda de Rave y de Rave despues ¿Quien mas?
¿Donde están la pruebas bajo normativa CEA-2010? Respondo yo, cuando las ranas críen pelo.
Cito textualmente lo que es (Lo pongo en ingles, dado que la traducción al castellano es mala y queda peor en el post):
CEA 2010 Subwoofer Testing - What Is This and Why We Use It?
For many years, a traditional means of quantifiably measuring distortion has involved the very simple principle that if you excite a device under test with a single frequency, any other frequencies which it simultaneously produces must therefore be distortion. As a result of measuring this repeatedly, on all different kinds of gear we find that our reproduction devices tend to add multiples of the excitation frequency, called simply enough, harmonic distortion. (If you excite a speaker with a 1000 Hz signal, and it simultaneously produces 2000 and 3000 Hz, it has created a 2nd and 3rd harmonic of the fundamental frequency, or simple harmonic distortion. It has been know for quite some time by those attempting to relate the simply derived number which measures only the amplitude of those harmonics relative to the fundamental, known as THD or total harmonic distortion, correlates quite poorly with the human perception of how badly the original signal is distorted. The 2010 CEA standard addresses this issue by using a progressively more stringent limitation on the allowable distortion. Higher-order and/or odd-order harmonics have progressively lower allowable distortion limits, as these tend to subjectively be more offensive to the human ear than lower order and/or even-order harmonics. I have personally seen, as far back as the early 1990's from my own research as a subwoofer system designer for Miller & Kreisel Sound, that we often could "tweak" a compressor in such a way where we found the result more musical and pleasing, yet the THD as measured by some very expensive and reliable HP equipment would actually go up as a percentage of the output. In my own personal experience, this was almost always a trade-off for more low harmonics (notably second or third) for less higher harmonics (fourth or higher). We shall discuss this relatively new CEA 2010 standard in some detail, and hold true to it where feasible.
Por cortesía de...
http://www.audioholics.com/education...oofer-shootout
Y de...
http://www.soundandvisionmag.com/blo...-baseline-bass
Que 4 son mejor que tal y que cual (Depende de las condiciones, no solo es SPL atufando el oído).
Que a mi coche le meto dos motores turbofan Rolls-Royce y vuela y corre mas que un Bugatti Veyron (¡ También!).
Si es cierto y le doy la razon al Rave, que hay verdaderas maquinas creadas en el mundo del HUM y superiores a comerciales ¿Pero el desembolso cuanto es?
Un ejemplo mas y de autenticos pepinos de subwoofer HUM:
http://www.data-bass.com/data?page=system&id=2 = a 1800$
http://www.data-bass.com/data?page=system&id=1 = ¡Este es barato! 1000$
Todos estos mejores que los JBL con un cacho y probados bajo normativa CEA-2010 (Vamos, con hechos y no con palabras "
")
Ahhh me olvidaba, mi HUM 24" da mas que un PB13-Ultra, si... pero es horrible y el desembolso fue grande (En mi caso no, un chollo por la oferta) de lo contrario me hubiera salido al menos por 2.000€.
Y como esto es el cuento de la buena pipa (Ese que nunca termina y continua en bucle infinito...), ya perdí suficiente "time" en desgranar un poco del tema y por millonésima vez.
Bye Bye