Hello I’m new to the forum and interested in diving into the WOPL world. I’m considering purchasing a phase liner 400 or 700 to have modified and not sure which would best for my speakers’ needs. I’m right in the middle of building an all tube driven high efficiency vintage system but got sidetracked with some ADS l910 speakers in my solid state bedroom setup. I’ll probably start a new thread about that specifically. Anyway, looking forward to learning about these phase linear amps.