Cita Iniciado por Moonfly Ver mensaje
Placebo effects are always a concern in any test situation*, but I would have to question your blind test as when you compare different subwoofer types, there are differences. I got a guy in AVF to do this for himself here:

http://www.avforums.com/forums/15833269-post292.html

and he is reporting the very same experience I describe and others also agree with. There are cases where subwoofers will sound very similar and are almost indistinguishable, but not when you are comparing different design types. Again, I would ask as to your reasoning as to why different types of subwoofers exists if they simply sound the same once they are eq'd flat. I dont wish to be impolite, but I have to question your testing if you cannot distinguish the difference between a high end ported and a high end sealed subwoofer, when both are capable of reference level playback. Even more so, less capable subwoofers are harder to match to each other due to performance limitations. Once I get myself a good system again, I will invite you for a listening session, and we can do this together and come to our conclusions.

We can quote group delay, harmonic distortions, spectrograph results, in room response measurements to our hearts content, but until this test is performed its all theory. I have done these tests myself and know the outcome, and have urged others to also do the same, and the vast majority have come to the same conclusions.

One final thing I would ask, is why do you think I would turn my back on ported designs if what you state is true. Sealed designs are more expensive if you want high spl output to be produced cleanly to low frequencies. You typically need a pair of drivers and at least double the clean power to match the output of a ported sub, so why would I pay these costs if there is no additional benefit from it.

*I do not agree that high end cables make a difference. A clean reproduction from an amplifier is clean no matter the cost, so a more expensive amplifier doesnt always make any real difference. High end power cables are pointless. Thes are things I believe, and its my belief that if you have the correct specification, then the end result is good, even if the cables etc are cheap.
Yo no me fío de las experiencias de los demás cuando han realizado pruebas sin el rigor necesario.
Lo que sí tengo claro es que si las diferencias de THD, grouo delay, etc están por debajo del umbral de detectabilidad humano, está claro que nadie las podrá distingui, y si lo hace será por un error en la metodogía de la prueba, ya sea por no haber sido capaz de igualar lo suficiente las curvas entre los subs a probar, o por no haber realizado un "blind test".

Creo que no se ha asimilado bien mi ejemplo sobre los cables.
Lo que he querido explicar es un ejemplo claro para que todo el mundo entienda la importancia que tiene el realizar una metodogía correcta para no inducir a conclusiones erróneas, por eso son necesarios los "blind test" rigurosos, ya que en pruebas conmutadas sabiendo que suena en cada momento la sugestión nos causa siempre malas pasadas y somos incluso capaces de "creer" encontrar diferencias donde en realidad no las hay.

Sobre el tema SPlmax, cada diseño tiene sus pros y sus contras según frecuencia, pero ese no es el tema sobre que estoy hablando, sino de si suenan o no indistinguibles una vez igualas curvas con EQ; o dicho de otra manera: de si un diseño aporta mejora de "calidad de sonido" audible sobre el otro. La respuesta de cualquiera que haya realizado un "blind test" riguroso es que no, mientras ninguno de los diseños se lleven cerca del límite.

Un saludete