I am running a Primaluna Prologue Three preamp feeding a Prologue Five amp.
I found the stock Chinese tubes to be lacking.
In the Prologue Three I replaced the rectifier tubes with early 60's Mullard 5AR4's, the driver tubes with NOS 60's German RFT/Philips 12AU7's, the input tubes with 60's Telefunken ribbed plate 12AX7's.
In the Prologue Five I replaced the Output tubes with a new quad of reissue GL KT-88's, the driver tubes with late 50's Sylvania long black plate 12BH7A's and the input tubes with new Black Sable Cryo treated Sovtek 12AX7LPS's.
My tube rolling has really made these Primalunas sound wonderful. They are not leaving anytime soon.
Al.
I found the stock Chinese tubes to be lacking.
In the Prologue Three I replaced the rectifier tubes with early 60's Mullard 5AR4's, the driver tubes with NOS 60's German RFT/Philips 12AU7's, the input tubes with 60's Telefunken ribbed plate 12AX7's.
In the Prologue Five I replaced the Output tubes with a new quad of reissue GL KT-88's, the driver tubes with late 50's Sylvania long black plate 12BH7A's and the input tubes with new Black Sable Cryo treated Sovtek 12AX7LPS's.
My tube rolling has really made these Primalunas sound wonderful. They are not leaving anytime soon.
Al.