Why HiFi manufacturers don't make active crossovers anymore?

Bryston had an active dsp xover at axpona with a couple of their amps. The showman was claiming their approach was so much better than just slapping a couple 'plate amps' on the back of a typical speaker and calling it active. Their dsp xover list at $13,000, then they're amps, then they're speakers. I have a room that I notice thru measuring shows no room gain from ported speakers meaning most full range passive ported speakers roll off at 60 hz and are 20-40 db down by 40 hz! The dsp8000 reaches deep and I don't know if it's because of dsp or driver configuration or the combination. I prefer an active xover if it means I don't need a rack of amps to drive my speakers as most passive systems leech power.

Audio Research made both active and passive crossovers for bi- and tri-amping Magneplanars back in the day.

If you see one for sale today, it is tons of money since, obviously, some people still want to bi- and/or tri-amp their systems.

While the technically descriptive articles above are interesting, if one wishes to use an active or passive crossover to manage their system, I see little reason why this cannot be done.

We set up many systems with these crossovers in the signal path back in the day, and they had no detrimental audible influence on the music.  Possibly that is why these items remain both elusive and expensive today.

Cheers!

Anyone experienced the Luxman A-2003 tube active crossover? 

I think Naim still make Active crossover electronics.  They no longer manufacture the speakers to work with these units though. 

I can't speak to most of the crossovers mentioned in the thread. I use a Bryston 10B two way analog crossover with Magnepan 1.6's and 2 Arcam 10P 2 channel amplifiers. I removed the speakers passive crossovers and rewired the speaker panels to the binding posts. I was able to pick up the crossover and second amplifier used. IMO, it was time and money well spent. It really opened up and cleaned up the sound. 

The Bryston 10B is not as flexible as some of the digital crossover versions (i.e. - limited in slope and crossover point selections, and no room correction) but matches very well with the Magnepans as what choices are available with the Bryston are close to what the original passive crossovers were. I ended up liking different settings more than those matching the original passives.

I believe the Bryston and Pass analog active crossovers are still available and I see them used on rare occasions. Good luck with your project.

JS