Only one unit is available, the prototype unit shown at CES a few years ago. The top unit in the photo is the actual unit. These are late production units with the textured gloss finish. Photo is actual unit. Basic circuit topology is very similar to a Renaissance amplifier.
Photo is actual unit.
Has bias indicator lights and adjustments on the front panel, can drive loads as low as 2 ohms at full power. This unit has a slight cosmetic mar on the front left side, not visible from a few feet away. Photo is the catalogue shot, not theactual unit. The Classic Marantz tube stereo preamplifier. Photo is actual unit.