sqitis
Head-Fier
Understood! That is one area I could hear that would better the 63. Just a little bit more twinkle on the top end......LOLI would trust you with two 58 melz solid plates one day but they are not for sale, only for your listening pleasure. They are close to the 63's, only slight differences, better high frequency response IMHO. Most of my listening is with the Incubus and it is made to let the 6sn7 shine. In one of my pre-amp tube setups there are 12 tubes involved, it is tough for me to differentiate as much in that setup.