Wathen CryoTone Tubes 12AX7-WCM Preamp Tube

The gain structure on the CryoTube 12AX7-WCM preamp tube in a Deluxe style amp is incredibly smooth rather than fuzzy, crunchy, or just plain harsh. The WCM has more pronounced midrange (around 1k) than the WCB, which is a helpful frequency range to help cut through a mix.