Dr. Ears
Super Member
First, I replaced the two Nuvistors with NOS ones from the 1930's to 1940's and immediately noticed more bass.
Next, I replaced the gray plated 6AU6 with an RCA black plated one, then I replaced the Telefunken 12AU7 with a black plated RCA 5814 from the 1950's, which gives you more detail, but I am not certain that I prefer the RCA 5814 over the Tele 12AU7.
Incoming are a smooth plated Tele 12AU7, black plated 6HS6's, a Mullard 6EA8, a black plated 6CS6 and a Telefunken 6AU6.
Fortunately none of the tubes are very expensive.
I will report back after I have heard it's new tube compliment.
Next, I replaced the gray plated 6AU6 with an RCA black plated one, then I replaced the Telefunken 12AU7 with a black plated RCA 5814 from the 1950's, which gives you more detail, but I am not certain that I prefer the RCA 5814 over the Tele 12AU7.
Incoming are a smooth plated Tele 12AU7, black plated 6HS6's, a Mullard 6EA8, a black plated 6CS6 and a Telefunken 6AU6.
Fortunately none of the tubes are very expensive.
I will report back after I have heard it's new tube compliment.