Wloeb - I concur. The differential pair is certainly no passive circuit, though. By definition 2, the Aleph does not not require a differential input for its operation, so bypassing the additional circuitry when connected to a source that is not truly differential makes sense. This is especially true for short cable runs.
The Pass XONO that serves as the source to my amps is a non-differential implementation that creates a balanced output via a phase splitter at each output.
The Pass XONO that serves as the source to my amps is a non-differential implementation that creates a balanced output via a phase splitter at each output.