Rui,
Update from the Audio Sleuth. I went back to the Canadian Sound&Vision magazine "Audio/Video Preview 1996" (I was editor before I moved to "Audio" mag in New York) and checked the Axiom listings.
In 1996, there were two different versions of the Axiom AX500 subwoofer. One was passive (no internal amp) and listed at $599. It used the 10-inch aluminum-cone woofer.
The other Axiom AX500 was active and the internal amplifier was spec'd at 130 watts; that model listed at $899. That was typical power output of subwoofers of that era. Paradigm's largest sub in 1996 had an internal 120-watt amp.
Regards,
Alan
