I am really wondering, is the stock GE5670 tube that comes installed in the Paradisea really all that bad? Does it have no uniquely good qualities at all?
Heck no! That little tube sounds just fine. If your system is a little bright or hard sounding, that tube will fit like a glove. On the other hand if your system is bordering on the warm side, thats where these NOS tubes help to provide the proper system balance.
Balance being the operative word with any change to your system.
If you like the sound of the stock tube, then thats all that matters. Don't get caught up in chasing NOS tubes, you could drive your self nuts. Just sit back and enjoy the music
