The amplifier output stage of the PM-KI Ruby allows a large power output, delivering 2x100W into an 8ohm load, and easily copes with high-impedance speakers thanks to a 2x200W output into 4ohms. The amplifier module connects directly to the rear panel PCB on the PM-KI Ruby to maintain signal purity and sound stability.

The result is a much more dynamic, accurate and detailed sound. Over the years, Marantz has developed different HDAM technology to fit the particular requirements of players and amplifiers. The PM-KI Ruby uses the latest high-grade HDAM-SA3 technology, combined with optimized circuit design layout and carefully selected components, the PM-KI Ruby ensures exceptional sound quality and performance.

Distortion is reduced by using two-stage amplification in the phono stage, and Marantz’ HDAM is combined with JFETs (junction gate field effect transistors) in the input stage, giving high input impedance. The exclusion of coupling capacitors further simplifies the design, reducing signal distortion and enhances signal purity.