AHT manufactures or has manufactured the following equipment (click to expand models list):Solid State Amplifiers
AHT web site (December 2, 2009): The American Hybrid Technology Phono Stage is a two-box unit; the regulated power supply is attached by an umbilical to the phono stage proper. A few circuit (footnote 1) blurbs: shortest possible signal paths; ultra-high-precision, ultra-high-cost, 0.05% Vishay resistors; Teflon caps (none "crossing" the signal path); DC-coupled; all silver solder; and vdH linear-crystal 300 Ohm silver wire inputs. Substituting internal resistors alters the overall gain from 46 to 67dB, making the AHT particularly appropriate for a number of the low-output MC cartridges fashionable these days. I used a 50 ohm value for my trusty Grasshopper Gold brisk, light, and adept on its suspension lo, these many hard audiophile months. The 'Hopper is also designer Dan Fanny's reference, mounted on his tweaked-out Goldmund Reference.