My understanding is that the Model T Signature are 3-way active-crossovered but not powered. Users need to supply their own 6-channel amplification.
I think putting crossovers upstream of amplification makes a lot of sense. It also provides plenty of upgrading / tweaking opportunities as it lets you pick separate amps and match their character and sound signature to specific drivers and frequency ranges. In that sense the Brystons seem closer in spirit to some vintage Infinity or Apogee than modern active all-in-one speakers like Buchardt, KEF or Dutch & Dutch.
The M100 is listed at $4500 on Axiom’s website, whereas according to Bryston’s extraordinarily confusing website the Model T is discontinued, but it used to cost $12,000 when new. For that price difference you’d think the Brystons would sound better