I do not have the Candela, but in my tube equipment I have found the Mullard NOS cv4003 is the best sounding 12au7 tube for its rich midrange and fatigue free treble. The RCA cleartops come in second. Thy will take a lifeless sounding piece of equipment and make it sound great.
Tube rolling in the Candela
Hi all. For the Candela owners out there-what do you find to be the best sounding 12au7 and all its myriad variations in your system and what tubes have you tried? Also, I just picked up a Telefunken ecc82 red tip date coded Berlin, 1956. Are the red tips some special designation like medical equipment?