4705-G Progression/Gemini DAC Gemini is a special version of Progression DAC. Gemini comes with 2 Progression circuitry, each handling left and right channel separately, in the same Progression casing. For the maximum performance, we recommend Gemini to be driven with 2 Power Dumpties. Compatibility: Any CDtransport/player with unbalanced digital output and any pre-amplifier/amplifier with unbalanced inputs.