JAN Raytheon 12AX7
Consistently rated as one of the best sounding US made 12AX7, the JAN Raytheon 12AX7 Black Plates is a top contender for both smooth mids and lush top end.
From Vacuum Tube Valley - Issue 14:This super rare tube was magical, it that it did everything beyond perfect. Dynamics and micro-detail were astonishing and noticeably better than any other 12AX7 in the test. It was unanimous amongst the reviewers that this was their favorite tube.