G-ORb Rubidium Master Clock Generator

The G-0Rb looks at first glance like it could be a digital-to-analog converter. The unit is sheathed in Esoteric’s gorgeous metalwork, matching the P-03 universal transport and D-03 digital-to-analog converter in my equipment rack. The rear panel, however, reveals its uniqueness in the audio world—it holds eight BNC clock-output jacks, a BNC clock-input jack, and an AC power socket. A narrow front-panel display indicates the G-0Rb’s output frequency, which is adjustable via a row of buttons (see the linked review, above, from The Absolute Sound, for specifics).

The G-0Rb can be used with Esoteric transports and processors that accept an external clock signal, as well as with products from other manufacturers that have a word-clock input. The G-0Rb’s outputs feed the clock-input jacks on a transport and digital-to-analog converter. For example, front-panel switches on the Esoteric P-03 and D-03 transport and DAC disengage the units’ conventional on-board clocks and accept the clock from the G-0Rb.