Conrad Johnson SS amps


I am currently looking for a new power amplifier to drive my Martin Logan CLSIIs (4ohm load). I am deciding between CJ's MF2250 and MF2500. I was wondering what the difference was between the the stock model and the "A" model. ie: MF2250 vs. MF2250A. I would also like to know if they can they be bridged? Would I get better results using two MF2250 amps or a single MF2500 amp?
msilin
I think the Sonographe amps unlike the c-j MF ss amps used bipolar devices.  Though sounding slightly different, both were very good. Either one might be preferable depending on the rest of the system.
^Perhaps I should have said earlier c-j MF ss amps. I believe the latter ones use both mosfets and bipolars.
^While the current delivery might not be ideal, it could be adequate for your Thiel 2.4 SEs.