keep in mind that the vintage of the tube is factor in determining its sound.
with 12au7, i find the older brimar and mullard are my favorite. so far a tungsol 12axz has worked well in my cd player, but i am not sure of its vintage.
with 12au7, i find the older brimar and mullard are my favorite. so far a tungsol 12axz has worked well in my cd player, but i am not sure of its vintage.