I believe those woofers were ten inch. That was the real kicker; a ten inch bass driver in such a small box. They could do it because the tweeter could handle high power due to it's large size and big magnet. That tweet crossed at about 2k. The aperiodic loading is how they got the bass to perform well with such a wide freq response demand. The new one's( and I have not heard them) use much better quality drivers but the same configuration; 10"/woof and 1 3/4 " tweet with simple xover and ap loading. So I would expect they sound very close considering the same company and style of drivers are used. And remmember they are very Inexpensive. If you buy the parts it runs you 268$. Stuff them in your A25 box or have a really nice box built to specs and for 450$ you have a really good pair of speakers.