Bass amp for a tri-amped system?

Bd,
Thanks,
I'm totally unfamiliar with Eagles. I took the liberty to see them on your virtual system. They look interesting. I'm using 200 watt monos which these mammoth speakers need to sing. I'm actually completely content with my Signature amps - they are really quite wonderfull. The best of both solid state and tubes. Thanks for the suggestion.

IME, you can definitely optimize certain aspects with various amps that address a particular range better.

But in the long run, after you've gotten used to the sonic effects of that combo, the more cohesive and musically compelling sound from matching amps outweighs the "audio excellence" of disparate amps with disparate dynamics, tone, phase response, etc.

So the job of discovering the best amp that will work at all frequencies is much more difficult.

About the only time I've had luck mixing & matching was with subs working from 40 Hz or lower.

YMMV...

Please forgive me, but I don't understand the "disparate" problem if the active crossover prevents frequency overlap. and once again, it is the lowest of frequencies I'm trying to address probably below 40 Hz. Getting "used to it" doesn't explain the evaluations performed by qualified audiophile visitors. Once again, I think I understand the reality of mixing amps, it's well documented. however, I believe in this case, it minimally applies.

I've heard setups both ways. I think with a passive crossover, using the same amps makes sense and in my experience sounds better. With an active crossover it will sort of blend the two or three amps sound's together so there may be less sonic differences in the end and should sound like one voice. I would make sure to use all the same cabling either way I think. Your system looks and I'll bet sounds awesome. My speakers, Legacy Helix, are quadruple amped using a Xilica digital crossover and are supplied with about 3,600 watts per channel. Talk about headroom!
You might want to check out my system as well.

Thanks Sgr, I appreciate your perspective, especially after seeing your system!
Cabling to the amps are all Stealth Metacarbons with Stealth Indra upstream so I think I'm following your advice.