RARE NOS MITCHAM Mullard ECC82 12AU7 holy grail LONG Plates K61 dual Post Getter
Mitcham Mullard k61 ecc82 12au7 holy grail audio tube 91/91. “The top end is silky and pleasant and doesn't get rolled off. They retain a fine sense of "air" at the top, and the upper midrange is smooth and liquid.