You haven’t heard an amplifier until you hear a properly designed and implemented Gaincard amp. This amplifier is designed by the inventor of this design so you know it is going to be good. Engaging, musically satisfying and you will find yourself listening for long hours to your music. This amp will get you very close to the ultimate music listening experience.
Here are some comments by Herb Reichert of Listener magazine which are absolutely true:
Easily the smallest, most solidly built, and most musically effective solid-state amplifier through which I've ever played music. The 25-watt Gaincard amplifier will outplay the Krells and Levinsons, it will reveal more of the poetry and structure of musical art than any silicon-based amplifier I have experienced.
Model 4706 Gaincard and Model 4700 Power Humpty:
World's smallest number of parts - 9 parts per channel ( excluding attenuators ) World's shortest signal pass length - 32 m/m ( including the length of parts ) World's shortest NFB loop length - 9 m/m ( including the length of the resistor ) World's smallest filter/condenser - 1000µF, (50W version - 2200µF) Powerful voltage regulation with high capacity transformer - 170 VA cut-core transformer +-individual coils Dual mono construction with each channel in a separate chassis. Rigid and compact aluminum chassis construction to release vibrations smoothly. Separate 12-position attenuators for each channel. Can be up-graded into a pair of complete mono amplifiers by adding another Model 4700 Power Humpty.
Output power: 25W+25W ( 8) (50W version : 50W+50W) Input impedance: 22k ( unbalanced only ) Attenuators: 12-steps for each channel Output on and off switches for each channel Dimensions: Model 4706 170(w)x40(h)x100(d)m/m Model 4700 130(dia.) x195(d) m/m