Marantz PM-KI Ruby 2x100 Watts Reference Integrated Amplifier

Engineered and extensively tuned legendary Marantz sound master Ken Ishiwata and his team, drawing on more than 65 years of Marantz amplifier design knowledge
• Marantz high-resolution preamplifier stage with proprietary HDAM technology
• Switching power amplifier design derived from flagship PM-10 amplifier
• Generous output: 100W + 100W (into 8ohm), 200W + 200W (4ohm)
• Fully-discrete, two-stage design for signal purity, with separate power supplies for preamp and power amplifier sections to reduce interference 
• Toroidal transformer dedicated to preamp for clarity and powerful sound
• Current feedback design with newly-developed wide-range circuitry
• HDAM® SA3 circuitry for clean signal and optimal dynamics • MM/MC Phono input with new discrete Marantz Musical Premium Phono EQ circuit
• Thick nickel-plated copper independent input terminals for CD and Phono, plus Marantz-original high-quality/high-purity copper-plated speaker terminals 
• Linear volume control with new electric volume system
• High-quality construction with double-layer chassis, 5mm thick 
aluminum top lid, solid aluminum front and copper-plated chassis • High-grade, carefully selected audio parts: ultra-low leak current Schottky diodes, low noise complementary transistors, high-grade resistors, newly developed custom electrolytic capacitors, audio grade film capacitors and mica capacitors.
• Laser-engraved Ken Ishiwata signature and Ruby motif, marking Ishiwata’s 40-year Marantz legacy