• Marantz PM-KI Ruby Signature Reference Integrated Amplifier
• $5199.00

Marantz PM-KI Ruby Signature Reference Integrated Amplifier

Marantz has been designing and making amplifiers for more than 65 years, and for 40 of those the products have reflected expertise of Ken Ishiwata. Now, to mark his four decades with the company, the PM-KI Ruby amplifier has been developed and tuned by a highly experienced engineering team led by KI himself. . Features a fully discrete two-stage design with separate power supplies for the pre-amplifier and power amp — plus, a moving coil/moving magnet phono stage complete with Marantz Musical Premium Phono EQ circuit and Marantz HDAM technology for signal purity and exceptional audio quality. PM-KI Ruby is built on a vibration-resistant double layer chassis with thick aluminum panes for rigidity and features a laser-engraved Ken Ishiwata signature to commemorate his legacy.

**Key Features **

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

Pure Analog Design

The purely analog design of the PM-KI Ruby contributes to its noise-reduction structure and clean build. Rather than build the DAC into the amplifier, which would add noise within the chassis, Marantz built the PM-KI Ruby without one and then implemented the DAC in the SA-KI Ruby Super Audio CD Player. This eliminated interference with the delicate analog signals passing through the amp, maintaining an analog environment that’s as pure and clean as possible.