Bi-Amping Options B&W 801 Series 2

tomcarr is mistaken; your speakers do not dip to 3 Ohms; they have a minimum impedance of ~ 5.5 Ohms at ~ 10 KHz. This speaker has very benign impedance and phase angle curves which make for a very easy to drive speaker. Regrettably, I consider tomcarr to also be mistaken in stating that they need current. At chez xeno, our North Creek cross-overed Matrix 801 Series 2 speakers are driven by 75 lb. custom tube monoblocks that use 2 BL7 and 4 KT77 tubes, making about 100 watts. The system can play much louder than I would ever want.

Suffice it to say, I agree with russ69, try the Rogue 100. I bet it sounds great :).

Saw your system photos; I’m curious about your 801’s crossovers; what are they? They look great...good for you for upgrading from the week link factory x-overs. Oh, and forget about the bass alignment filter, at least the B&W one; it steals the incredible detail that these speakers have without it. The Krell version is thought by some to avoid this problem, I don’t know, but I do know that I’m not willing to put anything between these amazing speakers and our amazing amps other than Silversmith’s amazing Fidelium speaker cables :)

Enjoy your great speakers!

@russ69 A single MC-252 got better highs and better lows than the Rogue Stereo 100 from the Warfedales, in my opinion. I had issues with very dissonant distortion from an Electric Light Orchestra recording when running both the Freya and the Stereo 100, although the main issue was with my cartridge & Numark turntable & arm, as I recall.  Taking the Freya out of tube mode removed the distortion. I actually came to prefer the buffered mode for the Freya. 
The B&W have a lot more top end than my vintage Warfedales, ARs, and KLH models, so I was thinking that with the B&W speaker, I wouldn’t mind a bit of roll-off on the top end. 

@raysmtb1 I am using at least one tone control now, the ‘Environmental’ equalizer McIntosh MQ-107, and although I haven’t attempted to ‘curve’ it as yet, I am boosting the bass at ‘2’ out of 5 or 6 (I can’t recall exactly), but I’ve had to turn it down from ‘rattling the windows’ on some recordings. I would say you’re correct, although you can hear the bass without the EQ boost, you can hear it a lot better with it. 
More to your point, I’m not sure what more power will do for me. The manufacturer describes the bass driver as “12 inch (300mm) high-power polymer-cone woofer,” and I have read comments about what a nice speaker it is (was), but that it required a lot of power. When I have it turned up to ‘loud’ I’m 21 dB consuming about 25 Watts. But the amp experts always talk about having enough reserve in either the choke or the capacitor bank to deliver high amounts of current in a short amount of time to properly deliver the ‘transients’ that make for dynamic playback. 
But I think the also say that twice the power takes ten times the Watts, so . . . how much is enough, and how much is too much? That’s kind of my question. 

@tomcarr I like the way you think. I’m probably goin to try it, regardless, but I thought I would ask the question here, to gain knowledge from experts and those more experienced than myself. I’ve got a good deal of money tied up in the system at this point, so there isn’t a lot of room for ‘playing around’ in ways that failures go in the trash can. Ben there, done that, got the T-shirt and a few damaged amps and speakers to prove it. :-)

@lowrider57 Thanks for the compliment on my system, I’ve certainly been all-in since COVID struck which coincided with my retirement and my wife’s death May she rest in peace. 
Regarding the crossover, the speaker comes with two sets of speaker terminals, so that to drive them from a single amp, I would need strap the two positive terminals together and strap the two negative terminals together as well so that the power from the two wires could get to all four terminals and from there to all three drivers. 
It is my understanding that each original set of speaker terminals were connected to their own crossover network, and the drivers receive their signal from the crossover network internal to each speaker, but external to the amplifier. I include a picture of the crossover networks in my virtual system photos. Both crossovers inhabit the same circuit board, so it is difficult to distinguish them. 
I can definitely vouch for the fact that if I turn the one amp off driving the midrange and tweeter, all I hear is muffled bass notes, not at all distinct or loud; likewise, if I turn the amp feeding the bass drivers, all I hear is faint ‘tinny’ treble, again, not very distinct or loud. But when both amps are turned on I hear much more than the sun of the separate parts, the notes are clear, distinct, and loud, there is a sound stage (speakers disappear) instruments are well-placed within it, and there is plenty of ‘air’ around the instruments. As one listener noted, “I feel as if the musicians are in the room with me.” It is truly astonishing, and I didn’t have that kind of sound until I brought the B&W 801 speakers into the mix. They are truly a magnificent speaker: what you have (in the recording) is what you hear, no doubt.