I have a CJ MF-200 which is good into 1 ohms. These amps have alot of current. You should have no issues with these amps concerning power into 4 ohms. I believe my amp puts out 250 watts per channel into 8 ohms and over 400 watts into 4 ohms. I have an old review somewhere. The Mf-2300A is basically the same amp just tweaked with more exotic parts. I spoke to Bill Thallman who used to design this stuff. He said the 2500 has better bass and drive, but the 2300 has a warmer more natural midrange. I will be selling my amp soon since I upgraded to a Pass amp. I kept my CJ a long time. I tried many highly rated amps in my system to try and better the CJ. I kept coming back to the CJ, and sold the other amps (Llano, Odyessey, Belles, McCormack) until I got the Pass amp. I remember reading someone else who owned the MF-200 with speakers dipping into 1 ohm. The CJ amp had no problems. The transformer on this amp is monsterous.
c-j technical questions
Does anyone know of any tests that show the power out-put of conrad-johnson's solid state power amplifiers into a 4 Ohm load. I'm particularly interested in the 2300, 2300A, 2500 and 2500A amplifiers. I'm also interested to know what the out-put impedance range preceding these amplifiers should be.