I’m sorry, but without the OEM passive crossover components, the inherent impedance of the speaker in the bass and midrange frequencies is very high, like 20 ohms and up (below 100Hz). I personally measured mine. Why would the MA2s ever have to look at a 1 or 2 ohm load? The reasoning behind using the 1 ohm resistors in series is to protect the toroidal audio transformer; they apparently do not like to look back at an amplifier with a very low output impedance, like your Bricasti or most other SS amplifiers. However, the MA2s have a high-ish output impedance which per se protects the toroid. So, yes, I understand why you use the 1 ohm resistors between the Bricasti and the transformer it drives, but they are not needed for the MA2, which anyway may be driving the bass transformer in parallel with the toroid. (Not sure how you have this stuff connected. I assume you are using a digital crossover that splits the frequencies between the bass and treble and super treble. I also assume the MA2 is operating only between around 100Hz and 5kHz, with the Bricasti taking over above 5kHz. Have you removed the OEM passive crossover components? If you have not, then I do see that the MA2s might have to deal with very low impedances, but I fervently hope not.)
Meantime, I am driving my 845PXs full range (heavily modified by me as you know) with a single Atma-sphere MA240 (heavily modified by me). I doubt the speaker draws more than 40-50W at full volume. Yes, I should add subwoofers.
