Cita Iniciado por DarkenedUnderpass Ver mensaje
Bueno pero los subwoofers tienen varios cientos de potencia de vatios, a veces más de 1000w, nada que ver con una etapa de 150W en Clase D. No sé, quizá sea un mito que deba enterrar, pero leo estas cosas y me echa para atrás la clase D:

https://the-ear.net/review-hardware/...8-loudspeaker/
"It’s also possible that the class D amp doesn’t like the 2.5 Ohm impedance minimum of the 948. However, the Focal shows true harmony and extended listening will never be a problem. This is a system for a music lover who has plenty of time to enjoy it."

https://www.audioholics.com/tower-sp...al-aria-k2-936
The above graph shows the electrical behavior of the Focal Aria K2 936. Focal specifies this speaker to have a nominal impedance of 8 ohms, and that seems like a stretch. This is very much a 4-ohm load; in fact, the minima drops well below 4 ohms by my measurement. I would say Focal’s spec is there as reassurance that regular AVRs can handle this load. They probably could, but with a steep phase angle at the minima at around 100Hz, a very heavily used frequency, I wouldn’t want to crank these speakers on any AVR that cheaped out on the amplifier section. These speakers should be used with a stout amplifier

https://www.stereophile.com/content/...r-measurements
My estimate of the Focal's voltage sensitivity was 89.5dB(B)/2.83V/m—close to the specified 90dB, and usefully a little higher than average. The Aria 936 is specified as having a nominal impedance of 8 ohms and a minimum impedance of 2.8 ohms; my measurement (fig.1) confirmed the minimum value at 108Hz, but as the impedance stays below 4 ohms from the upper bass though the lower midrange, where music has high levels of energy, I would recommended using a amplifier rated into 4 ohms with this speaker.
Sí, sí, de acuerdo... pero no hay que generalizar los resultados de un modelo concreto con las especificaciones del resto de la serie, que pueden ser totalmente distintas.
En el caso de la 948 yo no veo que sea una curva exageradamente compleja o difícil para un amplificador "normal".

Y bueno.. las webs audiófilas han tenido un odio eterno a la amplificación en clase D: no quieren asumir que una pequeño modulo de 500gr entregue los mismos 400 watios que un monstruo de clase AB que pesa 20Kg.... y que de esta manera pueda "justificar" que se le ponga un precio escandaloso.

Solo hay que ver los modernos modulos Purifi, Hypex o los Pascal (que tengo yo) con cifras SINAD de ensueño.

Los mitos, si están deben enterrarse.

UN saludo del Oso