Question for amp experts

Yes, it possible for them to sound even better.  The key word is synergy.  The amp can actually be matched to the driver.  Additionally, the crossover is easier to implement.  This applies to both analog and digital designs.  Although it is most common, the amp and crossover do not have to be placed within the loudspeaker cabinet.

Hi,
theoretically speaking if same amp used yes, but with a seperate one no. And still you will need a preamp. Vibration issues and interference with crossover can be minimized to a point with construction. I cannot imagine a tube amp inside a speaker cabinet.

Petgo60,

Good points. I know many of the wireless desktop, active speakers have preamp, dacs, built in. Be a pain if you wanted to add a TT. 

I believe it may be, for the reasons given by @onhwy61 
If not, then explain the success of ATC speakers.  I came very close to going in that direction after a frustrating 5+ years of looking for an amplifier that would sound great in my system.  I probably would have ended up with ATC SCM 100s if not for my new SMc amplifiers.
http://atcloudspeakers.co.uk/2020/04/atc-scm100se-wins-hi-fi-editors-choice-award-2020/
http://atcloudspeakers.co.uk/wp-content/uploads/2019/08/HIFI174_ATC_SCM100SE_Review.pdf

I'm no expert but most all subwoofers are active speakers. A lot of studio speakers are active. Maybe it has more to do with the target market.