Conrad Johnson MF2250A / MF2500A vs CJ MF2275SE / MF2550SE

The biggest difference is that the SE indicates it has the Teflon Caps. I had a 2500A but haven't heard the newer amps

Also, the resistors in the SE models are supposed to be superior & more costly VISHAY brand.  But I wish I knew if it would be a change that was apparent.

The MF 2250 and 2500 were basically the same amps but with different power. 25 years ago they were good amps but not the last word in detail. But musical with good control. The 2275 and 2550 SE are far superior in sound and build. The circuit and power supplies were changed and all the parts upgraded. The MF 2550SE was probably the best ss amp CJ ever made, possibly one of the best ss amps out there. The 2275 has a hair less headroom and bass but if you have efficient speakers will be just as good. The MF2550E is one amp I wish kept. Read the reviews, they are spot on. Call Jeff at CJ and he can walk you through with more details. 

Consider posting the same question on the CJ owners group forum. I find it much more helpful than Agon when it comes to specific CJ questions. No offense to members of this group. The CJ forum is brand specific. 

Thanks to all

47ghibli--

I provide concierge service for CJ. To add a little more to my earlier post. The main difference between the MF2500 and 2500A was internal wiring and binding posts. The 2275SE and 2550SE are an entirely new generation of circuitry and parts.  They use Teflon caps throughout and Vishay resistors in the audio circuit. Sonically they are the same except for the added power of the 2550. If you are looking at the 2275 for sale now, it is a great price for a great amp.  CJ can go over it if you want it checked out. Hope this helps.  Happy New Year to all.