A message from the Designer
My analog experience transitioned from hobbyist to professional with the design of the ARP 2600 Music Synthesizer
( made into a legend by Stevie Wonder) in 1971. Since 1996 I've been writing component design articles and reviewing speakers for Audio Xpress magazine. The June '06 issue shows "Mad Katy", the perfectionist 250 watt tube amp I designed. One year later ( June '07 issue), i described how Intrinsic Fidelity Testing allows direct listening comparison of a component's input and output signals, with the highest resolution and freedom from extraneous variables.
Hard to find articles by author:
SONIC COMPARISON OF POWER AMPLIFIER OUTPUT VS INPUT
This simple test method is "beyond compare" in determining a power amp`s I/O signal. By Dennis Colin
A 6-CHANNEL VOLUME/BALANCE CONTROL
Construct this master volume control to experience the excitement of "better than CD" quality by Dennis Colin