Not all wpc are created equally. Some amps, not necessarily new, sound significantly more powerful than others of the same power rating. I have heard the class A Bedini 25X25 sounds huge for a 25wpc amp. The classic NAD 3020 kicked out an amazing 20wpc. And tube amps can pull off the same trick.
Me thinks there is much more to the equation than the wpc rating, whether using the old or new standard.
Me thinks there is much more to the equation than the wpc rating, whether using the old or new standard.