Conrad Johnson SS amps

MF 2300A is upgraded version of the amp,better sounding one.

Yeah,they are both mosfet amps,2300 and 2300A i mean.The hole is described in one of the reviews posted on CJ website.

Hi
1.CJ MF 2500A cannot be bridged.It is impossible by design.
2.I bought 2 MF 2500A to biamp my Snell type B which is 4 ohm/86 db sensitive and is hugely dissapointed.These amps are bipolar design and they sound absolutely unConrad Johnson like.They also failed to bring my speakers to life.
Before i used a number of older CJ mosfet SS amps (like mf 2200, mf 200 which i still have) and was always amazed at how good they sounded and their ability to grab the woofers.MF 2500A in comparison sounds very thin and lean and there is a huge gap in lower midrange/upper midbass region.They have a good high freq extension though so if your speakers have no more than 3 drivers you might be satisfied with them.Mine has 2 midrange drivers,2 tweeters,1 10" woofer and 1 10" subwoofer per side so the hole in the freq spectrum is very apparent.
Also MF 2500A sounds terrible at low volumes as opposed to older amps so you need to really crank up the volume which might be a problem if you live in the apt bldg.Older CJ mosfet amps handle all kind of loads with ease.ML as i know is one tough load so i can see a potential problem.The speaker can sound lifeless like in my situation.
If you like 50s-60s jazz or classical,i say go for it,but all your rock cds will become unlistenable.If you have any questions feel free to e-mail me.Take care.steve.

Yes,i like the old mosfet sound better.It is not as transparent on top as 2500 but it has that tubelike magic with solid state power.2500 sounds like SS.As for bass control i now have a very unpleasant rubbery bass,individual notes are not defined (no midbass,remember),all i hear is congested bass ramblings.This is strictly my experience and you may find these amps very pleasant.I will still keep both amps for my second system (there is no way i will make close to what i paid by selling them).I will be very selective when buying speakers for them.I heard them in a store paired with AP Virgo III and the results were really good,just don't match it with a full range/tough load speakers.You will lose.