One of the early Dr. Z favorites, the Route 66 is an all original Dr. Z design based on the KT-66 tube originally built by Genelex. This tube generates the “Milkshake Thick” tones, as heard on John Mayall’s “Bluesbreaker” album featuring Eric Clapton (the “Beano Album”). The amp has piano-like clarity with endless sustain, even at low volumes. Its 32 watts sing when driven hard in a focused, thick distortion, with a tight bass response.