This one have been produced between 1990 and 1995, about
i am the owner of a cj evolution 2000 and it is the better world between SS AMP and TUBES AMP
bass performance is also very good close to the krell in some departement but the amp is a bit slow (like a classe A amp)
tubes are in the input and last a long time the amp got some mosfet transistors so the sound is smooth but the amp is running hot and could drive difficult load with finesse
it is a kind of muscle amp with a very delicate sound that i believe is better then the SS AMP of CJ but lesser then the PREMIER SERIE
i would recommand this purchase even if it is a very underated amplifiers.....