The only thing I would do with a MF2500 is either send it in for an "A" upgrade to CJ, or send it to Bob and Gary Backert and let them do their own upgrade. The latter certainly did a good job on my aging MF2250.
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?