Just acquired this amazing, and by many highly praised, Harman Kardon amplifier. I immediately liked the sound over my Yamaha A-780 ( okay, they are two quite different animals ) and even my wife said "Hey, I like this sound". It came with some issues which seems to be common to all of them after so many years, and I am interested if someone has done some kind of upgrade on this amplifier , and what was the experience, what is worth to do? One thing, resistors on emitters of output transistors are 0.5 Ohms, 5 Watts and 10% ?? I am thinking to replace them with 1% resistors ( 5 W, of course). Would it be good move, or can tighter tolerance cause problems? Thanks for any opinion.
I have not heard, but i do know there are a number of attempts to upgrage this amplifier. Based on my experience when these sold new (i had Citation 12) some of these could be very worthwhile.
dave
dave
Normally people start by replacing the power supply capacitors (you know after 40+years) if not done yet.
About the emitter resistors if you change them you probably going to have to redo the Bias/idling current and that in an amplifier of this vintage may mean other parts may be replaced.
Good luck and Merry Christmas
About the emitter resistors if you change them you probably going to have to redo the Bias/idling current and that in an amplifier of this vintage may mean other parts may be replaced.
Good luck and Merry Christmas