http://www.gspr.com/parasound/jc_6_points.htmlSo here are some of his philosophies that made his designs unique for the time.
1. Balanced Complementary Topology
Solid state amplifier designs have a certain amount of distortion generated by each active part. If the parts can be used in push-pull or in differential mode, then much of the inherent distortion can be canceled as it is being generated.
2. FET's Where Possible
FET's are inherently more linear than bipolar transistors. FET's have a voltage gain that is proportional to the square root of the current in the FET. Bipolar transistors have a voltage gain that is directly proportional to the current in the transistor. FET's are more linear over a greater current range.
3. No Signal Capacitors
Removing any need for input, output, or feedback capacitors, removes a potential distortion source, and can lower cost as well.
4. Class A When Possible
All else being equal, Class A is better. It has lower overall distortion, and the higher harmonics are reduced significantly.
5. Quality Parts
We have researched the potential problems with passive parts. Most passive parts have some measurable distortion. Some distortion mechanisms are subtle and are difficult to measure, but are detected in listening tests.
6. Regulated Driver Stages
The output stage can demand a great deal from a power supply. It is impractical to make a virtually perfect power supply in a cost effective product. We regulate the driver supplies to remove any potential distortion in the drivers, when the output stage makes a strong demand on the power supply.
My hope is that we can add discussion of designers to the thread to keep it going.