Hello sanhanul,

What do you want to know ?

I have also in the mean time downloaded the things that you have done, and have noted the infos. The output trafo in your case is terminated at 200 ohms. So you need a 200/16 ohms matching trafo to connect the 604s. The links that 'AltecBest' has provided are dead spot on. Go for them. The big size is a good thing for trafos, it means good sound.

If you want to know about the quality of these amps, from the design they seem to be old cinema amps, and the 200 ohm thing is for the long cable run from the projection room to the screen area. The sound should be good. The input is also trafo driven.....should be good quality type when they are of such an old era. Someone else may be knowing more about these.

Aditya