Hey James. This seems like an opportune time to jump in and ask for some help.
I’m building a new 2ch system around a pair of 4 ohm / 90 dB Spatial M4 and have zeroed in / obsessed over several very different amps. One of those is the 2.5B3 which has been more frustrating than the others in that there isn’t a lot of chatter or reviews of this model and nothing I’ve found relate to my wants including the B135 or any other cubed models.
Maybe it’s enough to say my preferences are more tube like, at least as it relates to power requirements. I want all the imaging, 3D sound stage, space, detail, dynamics, low end grunt, etc but at life size SPL - my nirvana. Yeah, I’ll occasionally crank it up but my critical listening comfort zone doesn’t bother the neighbors or my wife or further damage these aging ears.
I’d very much appreciate any comments you can offer but would also appreciate references to any material that will help me, and hopefully others, to understand Bryston philosophy and cubed. I’ve stumbled on informative podcasts and YouTube videos in the past that I can’t find again.
Many thanks,
Allan