If an engineer can build an amplifier specifically designed for the components of a particular speaker and the way they react to each other electronically the engineer can design the amplifier so that it matches the needs of its drivers and crossover networks, without an amp / speaker unit the engineer is only guessing. Using some random amplifier will never give you the exact needs of your specific speaker unless the speaker and amp are made as a unit.
I have a Dolby Atmos system and a home theater system in the same room, they are set up separately from each other, of course the home theater and stereo sounds much better but the Genelec mixing system sounds more accurate.
You don't have to be much of an audiophile or even a professional audio engineer to be offered vibration dampening systems of all types, to mount under speakers on stands, as equipment racks, under equipment feet, in the internal frame of components, under speaker cable and AC cables, vibration is big business. When the speaker is in the same enclosure as the amp how in the world can you take out vibration if it mattered all powered speakers would sound awful.
With only a few exceptions high end audiophile systems don't design amps and preamps for particular speakers, why because audiophiles like to tinker and argue about how the sound changes when the speaker cables are to close to the floor. Someday the powered speaker will be be the audiophile speakers of the future as they are now in concert systems with networked audio (connectors don't matter). Or perhaps audiophiles don't care about sound and only care about audiophile community, maybe that's ok, I'm one also.