Tri-amp 3 way speakers, still worth if using a multi-channel amp? (HiFI Stereo)

Hello to all,

Recently I’m thinking about tri-amp the 3 way loudspeakers that I’m planning to build, I know that the optimum way is with separated amps for each driver, but due the high costs of acquire 3 amps, I’m thinking about an multi channel amp.

Appreciate very much the thoughts from more experienced people about this subject, do you think that with a multi channel amp, and a very nice crossover, the system still will provide the great advantages of an active multi-amplified system?

Will put here the equipments that I have in mind, in order to provide some context.

This are the speakers that I’m planning to build, in fact, already purchased the first drivers :),

3 way: 12" woofer + radial horn + super tweeter
https://www.fostexinternational.com/docs/speaker_components/pdf/recom_enclose/w400aII_encl.pdf
(the exact drivers are the showed on the third option plan)

Active Crossover:
http://www.accuphase.com/cat/f-15len.pdf or http://www.accuphase.com/cat/f-25en.pdf
F15-L appears for reasonable prices from time to time...

Now, the amp it’s the big question?

I noticed that if choose the multichannel amp, mostly of then are designed for home theaters or pro audio... what about HiFi Stereo?

Appreciate very much suggestions, vintage or actual in production...

This Accuphase from 2001: http://www.accuphase.com/cat/px-600e.pdf

Appears to be the logical option, when considering the crossover, but this don’t appear very often, but according to my researches, they appear from time to time in Japan, found some in online auctions that was sold for prices not so extravagant... still costly, but, considering the price of acquire separated amps for the same performance level, still worth it..

Anyway, that’s it, appreciate very much all the thoughts about the subject, advices, amps suggestions...

Many thanks, best regards.