The Dr Z Route 66 is an all original Dr.Z design based on the KT-66 tube originally built by Genelex. This tube generates "Milkshake Thick" tones, as heard on John Mayalls
"Bluesbreaker" album featuring Eric Clapton
(the "Beano Album" as it is known to many).
is not a duplicate of the Marshall JTM-45,
but completely original spin with new tonal end results. The Route
66 Head has a EF-86 front-end. For those not familiar with this
tube, it is a 9 pin pentode, offering incredible gain and input
dynamics. It is normally used in high-end stereos, most often for its
accurate transfer of input signal, balance, and headroom.