Is Speaker design evolution stagnant


Based on what I read from speaker manufacturers, many use the same drivers but apply different crossover philosophies to achieve a particular sound.

My simplistic understanding is that while limiting the range of high or low signals , the remaining signal is corrupted ( phase inversions, roll off, etc.. ).

With today’s technology, why aren’t more speaker manufacturers using active crossovers to be connected after the preamp and sending exact spectrum signals separately to be amplified to each driver.  That would Eliminate all electronics inside the speaker cabinet except the drivers. Each driver gets fed only the signal that it works best at. No out of phase, half phase, quarter phase issues, no phase angle issues. 100% of the power goes to each driver without limiters to scale it back.  I think Bryston Model T Actives is designed this way ( don’t work for them and not pushing any product). Am I looking at it too simply? Do electronic crossover play havoc on signals the way inductors and capacitors do?

Some speaker manufacturers have gone half way with built in woofer amps ( Vaughn?)

Of course you would need a 3 channel amp for each side ( based on W/M/T config) or some variable of mono amps, whatever.



jacksky
@Jacksky   
Yes , i  already know what i am talking about, i  made semipowered 
LS  Bache audio-002 with build in 2 amps . one for low base
25-150Hz (adjustable) and one classAB  100-700HZ (fixed)
 customer need just one external low power AMP.  sound pressure
was balanced (using RTA)  sound so good , so need to be listen
The big challenge with activating a speaker is that the electronics can fail and the speakers become very heavy, difficult to ship, and a bigger risk to buy in the used market. A passive speaker can go 20-30 years without much risk of problems. 
Seanheis,
In my view that is a low probability scenario and wouldn't detract me. Don't know why you would ship a speaker. 
Post removed 
kssst_amojan,  I dont want to argue.  You are DIY guy and build and
rebuild for own use, i hope you sound as perfect as you tell us. 
 is no secret we use high quality amp module from Hypex , it not such
expensive and no chip, we have account and get good price. you see
on market now plenty accembled   amps based on Hypex M-core
Some people like it ,some not, but  without doubt is best choice
to amplified  25-700 hz, The quality , damping is excellent  amd price
for all parts no more $700-800      per speakers ( no labor cost)    FOR mids and high my customers using low power class A  (tub or solid
state)   My personal preference is Pathos double TT   20 Watt per channel. See my   http://bacheaudio.com/bache-audio-002ab-loudspeakers-v2-stereotimes-com/ 

  http://bacheaudio.com/6moons-audioreviews-bache-audio-002ab/