I would assume that demand has been off for such high wattage stuff. Due to the economy? Saturation? Dunno.
Practically speaking, the big power was really only useful for bass content in big inefficient woofers.
Nowadays, many speaker manufacturers have moved away from very inefficient acoustic suspension designs and are using more efficient bass reflex variants and even some really efficient horn-loaded configurations.
In addition, many audiophiles are opting for separate powered-subwoofers, taking a load off the "full range" speakers and therefore also their amplifiers.
Personally, I would be intrigued by a really big acoustic suspension woofer powered by some gazonga amp -- back to the old days. (But isn't this just what a lot of subwoofers are?)
Practically speaking, the big power was really only useful for bass content in big inefficient woofers.
Nowadays, many speaker manufacturers have moved away from very inefficient acoustic suspension designs and are using more efficient bass reflex variants and even some really efficient horn-loaded configurations.
In addition, many audiophiles are opting for separate powered-subwoofers, taking a load off the "full range" speakers and therefore also their amplifiers.
Personally, I would be intrigued by a really big acoustic suspension woofer powered by some gazonga amp -- back to the old days. (But isn't this just what a lot of subwoofers are?)