If you open the top of the amplifier or look into manual, you can find out what kind of tube is being used.
I recommend you to buy Nos(new old stock) tubes around 50$ and change the tubes.
If you are not familiar with changing the tube, you had better get the advice from some French audiophile around you.
I recommend you to buy Nos(new old stock) tubes around 50$ and change the tubes.
If you are not familiar with changing the tube, you had better get the advice from some French audiophile around you.