Both output 28V DC ? Is the amperage the same or different for the MPS-1 ? Not in a rush to do this -but I think ?? a MPS-1 is simply a plug in - but a MPS-2 requires shipping in for service to my BP-25 ? This is to adapt the power input on the BP-25 to the extra pin on the BP-2 (I think?).
BTW-first 24 hours of a obviously old enough to vote BP-25 and among other audio pleasures -this is by far the quietest preamp I've ever had in my system -met my expectations and then some.