The Grail amplifier is a pure single ended, class A operated design in mono block configuration. It features one 5687 input tube, a single 300-B driver tube, and a pair of venerable 845s that run in parallel as the output tubes. Each stage is transformer coupled to provide excellent, low D.C. grid resistance. This results in the lowest possible distortion into each stage. The input stage features an input transformer providing 100 % voltage gain and ground isolation between the amps input and all preceding audio equipment. All signal transformers are custom, double C core designs that provide a precision sound stage with the clearest depth of field possible. The driver and output stage are run with fixed biasing to provide low distortion and filament start up protection.

Power is delivered via five discreet power supplies. The input-driver and output power supplies utilize full wave bridge rectification with choke inputs, to a PI network for filtration. Choke input power supplies are used throughout this design. Choke input supplies, while expensive and more time consuming to design a circuit around, are considered by many to be the best option when sound quality is of ultimate importance. The output and driver filament supplies are DC and heavily filtered to prevent AC ripple from coupling to the electrodes of each stage. The often under-appreciated biasing supply also receives a full wave bridge rectifier and PI filter. Each respective stage includes a driver and output section 10 turn biasing potentiometer for easy adjustment of operating idle current. All signal supplies use high voltage polypropylene capacitors for optimal noise rejection and frequency response. High quality electrolytic capacitors are used in the biasing and filament supplies.