Here is something I’ve been working on for a while, the Pure BiPolar or Dynalo Mk2. The Dynalo circuit has been used in a lot of amps over the years but as parts have been obsolete it was time to finally update it. The biggest difference is the input stage which is now “super symmetry” as Nelson Pass called it but it means it can take a single ended signal (RCA) and converts it to balanced without any extra circuitry. That’s why the amp has only one balanced output socket, it is always balanced. Other changes are higher rail voltages and higher Class A bias for more power. To power the amplifier modules it has my own version of the ultra stable GRLV (Gold Reference Low Voltage) power supply which is just about the best power supply we can design fed by an oversized transformer. The end result of this is one of the best dynamic amps we’ve ever designed. It’s highly transparent and able to cope with even the most demanding loads.

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