Fun part of it is tube rolling.
If you change the input tube with NOS, the sound will change drastically.
Some NOS pair of tube cost more than 100 bucks, but there are good ones costing around 70 $ for pair.
If you change the input tube with NOS, the sound will change drastically.
Some NOS pair of tube cost more than 100 bucks, but there are good ones costing around 70 $ for pair.

