Wathen CryoTone Tubes 12AX7-WCB Preamp Tube

The CryoTone 12AX7-WCB is an incredibly sweet-sounding tube. It has slightly more pronounced upper mids than the WCM, which can be good for blues and especially jazz. This tube is very responsive (fast) to the touch, with a fast note bloom, which makes it a bouncy feel and very fun to play.

This tube seems to have pretty high headroom, which for some might be a plus, for others maybe not. However, when the tube does saturate, the gain structure of it is incredibly pleasant and doesn't overpower the fundamental tone of the tube.